svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / feature / paging / impl / FeaturePagingHelperImpl.java @ 44840
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.fmap.dal.feature.paging.impl; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Date; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.ListIterator; |
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import java.util.logging.Level; |
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import org.apache.commons.lang3.mutable.MutableBoolean; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.EditableFeature; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureQuery; |
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import org.gvsig.fmap.dal.feature.FeatureSelection; |
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import org.gvsig.fmap.dal.feature.FeatureSet; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.fmap.dal.feature.exception.ConcurrentDataModificationException; |
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import org.gvsig.fmap.dal.feature.exception.FeatureIndexException; |
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import org.gvsig.fmap.dal.feature.impl.dynobjectutils.DynObjectFeatureFacade; |
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import org.gvsig.fmap.dal.feature.paging.FacadeOfAFeaturePagingHelper; |
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import org.gvsig.fmap.dal.feature.paging.FeaturePagingHelper; |
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import org.gvsig.tools.dynobject.DynObject; |
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import org.gvsig.tools.dynobject.DynObjectSet; |
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import org.gvsig.tools.dynobject.impl.DefaultDynObjectPagingHelper; |
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import org.gvsig.tools.exception.BaseException; |
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import org.gvsig.tools.util.UnmodifiableBasicList; |
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import org.gvsig.tools.util.UnmodifiableBasicList64; |
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import org.gvsig.tools.visitor.VisitCanceledException; |
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import org.gvsig.tools.visitor.Visitor; |
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/**
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* Helper class to access the values of a FeatureCollection by position. Handles
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* pagination automatically to avoid filling the memory in case of big
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* collections.
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*
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* TODO: evaluate if its more convenient to read values in the background when
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* the returned value is near the end of the page, instead of loading a page on
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* demand.
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*
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* @author gvSIG Team
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*/
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public class FeaturePagingHelperImpl extends DefaultDynObjectPagingHelper |
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implements FeaturePagingHelper {
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private static final Logger LOG = LoggerFactory.getLogger(FeaturePagingHelperImpl.class); |
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private static class Page { |
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private Feature[] features; |
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private final long number; |
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private final int size; |
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private long lastaccess; |
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public Page(long number, int size) { |
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this.size = size;
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this.number = number;
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this.features = new Feature[size]; |
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this.lastaccess = 0; |
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} |
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public void setFeature(int i, Feature copy) { |
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this.features[i] = copy;
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} |
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public Feature[] getFeatures() { |
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this.lastaccess = (new Date()).getTime(); |
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return this.features; |
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} |
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public long getPageNumber() { |
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return this.number; |
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} |
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public long getLastAccess() { |
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return this.lastaccess; |
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} |
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public int size() { |
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return this.size; |
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} |
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public void dispose() { |
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for (int i = 0; i < features.length; i++) { |
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features[i] = null;
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} |
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this.features = null; |
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this.lastaccess = 0; |
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} |
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} |
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private static class PageCache { |
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private final int maxpages; |
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private List<Page> pages; |
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public PageCache(int maxpages) { |
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this.maxpages = maxpages;
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this.pages = new ArrayList<>(); |
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} |
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public void clear() { |
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for (Page page : pages) {
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page.dispose(); |
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} |
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this.pages = new ArrayList<>(); |
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} |
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public Page get(long pageNumber) { |
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for( Page page : pages ) {
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if( page.getPageNumber() == pageNumber ) {
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return page;
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} |
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} |
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return null; |
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} |
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public void add(Page page) { |
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if( this.pages.size()< this.maxpages ) { |
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this.pages.add(page);
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return;
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} |
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int toDrop = 0; |
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for( int i=0; i<this.pages.size(); i++ ) { |
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if( this.pages.get(i).getLastAccess()<this.pages.get(toDrop).getLastAccess() ) { |
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toDrop = i; |
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} |
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} |
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this.pages.set(toDrop, page);
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} |
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} |
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private FeatureQuery query;
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private FeatureStore featureStore;
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/** If the selected Features must be returned as the first ones. **/
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private boolean selectionUp = false; |
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private FeatureSet featSet = null; |
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private FeatureSelection initialSelection = null; |
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private Feature[] features = null; |
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private PageCache cachedPages = null; |
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private boolean initialization_completed = false; |
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private FeatureSelection selection = null; |
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/**
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* Constructs a FeaturePagingHelperImpl from data of a FeatureStore.
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*
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* @param featureStore
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* to extract data from
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* @throws DataException
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* if there is an error initializing the helper
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*/
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public FeaturePagingHelperImpl(FeatureStore featureStore)
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throws BaseException {
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this(featureStore, DEFAULT_PAGE_SIZE);
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} |
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/**
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* Constructs a FeaturePagingHelperImpl from data of a FeatureStore.
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*
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* @param featureStore
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* to extract data from
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* @param pageSize
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* the number of elements per page data
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* @throws DataException
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* if there is an error initializing the helper
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*/
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public FeaturePagingHelperImpl(FeatureStore featureStore, int pageSize) |
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throws BaseException {
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this(featureStore, null, pageSize); |
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} |
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/**
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* Constructs a FeaturePagingHelperImpl from data of a FeatureStore.
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*
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* @param featureStore
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* to extract data from
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* @throws DataException
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* if there is an error initializing the helper
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*/
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public FeaturePagingHelperImpl(FeatureStore featureStore,
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FeatureQuery featureQuery) throws BaseException {
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this(featureStore, featureQuery, DEFAULT_PAGE_SIZE);
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} |
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/**
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* Constructs a FeaturePagingHelperImpl from data of a FeatureStore.
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*
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* @param featureSet
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* to extract data from
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* @param pageSize
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* the number of elements per page data
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* @throws DataException
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* if there is an error initializing the helper
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*/
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public FeaturePagingHelperImpl(FeatureStore featureStore,
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FeatureQuery featureQuery, int pageSize) throws BaseException { |
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super();
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this.cachedPages = new PageCache(3); |
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FeatureQuery query = featureQuery; |
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if (featureQuery == null) { |
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query = featureStore.createFeatureQuery(); |
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query.setFeatureType(featureStore.getDefaultFeatureType()); |
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} |
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this.featureStore = featureStore;
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this.query = query;
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this.query.setPageSize(pageSize);
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setDefaultCalculator(new Sizeable() {
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public long getSize() { |
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FeatureSet featureSet = getFeatureSet(false);
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try {
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return featureSet.getSize();
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} catch (BaseException e) {
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LOG.error("Error getting the size of the FeatureSet: "
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+ featureSet, e); |
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return 0l; |
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} |
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} |
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}, pageSize); |
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if (LOG.isDebugEnabled()) {
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LOG.debug("FeaturePagingHelperImpl created with {} pages, "
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+ "and a page size of {}", new Long(getCalculator() |
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.getNumPages()), new Integer(pageSize)); |
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} |
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this.initialization_completed = true; |
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} |
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/**
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* @return the selectionUp status
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*/
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public boolean isSelectionUp() { |
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return selectionUp;
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} |
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public FeatureSelection getSelection() {
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if (selection == null) { |
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try {
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return getFeatureStore().getFeatureSelection();
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} catch (Exception e) { |
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LOG.warn("Error getting the selection", e);
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} |
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} |
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return selection;
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} |
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public void setSelection(FeatureSelection selection) { |
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this.selection = selection;
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} |
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@Override
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public void setSelectionUp(boolean selectionUp) { |
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this.selectionUp = selectionUp;
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try {
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this.cachedPages.clear();
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FeatureSelection currentSelection = getSelection(); |
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if (selectionUp && !currentSelection.isEmpty()) {
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initialSelection =(FeatureSelection) currentSelection.clone(); |
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setCalculator(new OneSubsetOneSetPagingCalculator(
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new FeatureSetSizeableDelegate(initialSelection),
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new FeatureSetSizeableDelegate(getFeatureSet(false)), |
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getMaxPageSize())); |
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} else {
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if (initialSelection != null) { |
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initialSelection.dispose(); |
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initialSelection = null;
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} |
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setDefaultCalculator(new FeatureSetSizeableDelegate(
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getFeatureSet(false)), getMaxPageSize());
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} |
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} catch (BaseException e) {
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LOG.error("Error setting the selection up setting to: "
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+ selectionUp, e); |
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} catch (CloneNotSupportedException e) { |
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LOG.error("Error cloning the selection "
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+ "while setting the selection up", e);
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} |
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} |
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public synchronized Feature getFeatureAt(long index) throws BaseException { |
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// Check if we have currently loaded the viewed page data,
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// or we need to load a new one
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int maxPageSize = getMaxPageSize();
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long currentPage = getCurrentPage();
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long currentPage2 = currentPage;
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long pageForIndex = (long) Math.floor(index / maxPageSize); |
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if (pageForIndex != currentPage) {
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setCurrentPage(pageForIndex); |
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currentPage2 = getCurrentPage(); |
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} |
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long positionForIndex = index - (currentPage2 * maxPageSize);
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if (positionForIndex >= getCurrentPageFeatures().length) {
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throw new FeatureIndexException( |
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new IndexOutOfBoundsException("positionForIndex too big: " |
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+ positionForIndex)); |
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} else {
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Feature feature = getCurrentPageFeatures()[(int) positionForIndex];
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return feature;
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} |
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} |
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public Feature[] getCurrentPageFeatures() { |
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if( this.features==null ) { |
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try {
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this.loadCurrentPageData();
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} catch (BaseException ex) {
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// Do nothing
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} |
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if( this.features == null ) { |
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String msg = "Can't retrieve the features from current page."; |
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LOG.warn(msg); |
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throw new RuntimeException(msg); |
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} |
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} |
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return features;
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} |
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@Override
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public FeatureSet getFeatureSet() {
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return this.getFeatureSet(false); |
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} |
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/**
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* Gets the feature set.
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* The boolean tells whether we must create the featureset
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* again (for example perhaps we need it after a feature
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* has been added/removed)
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*/
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private FeatureSet getFeatureSet(boolean reset) { |
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if (featSet == null || reset) { |
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if (featSet != null) { |
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try {
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featSet.dispose(); |
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} catch (Exception ex) { |
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LOG.info("Error while disposing featset.", ex);
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} |
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} |
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try {
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FeatureStore featureStore = getFeatureStore(); |
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synchronized (featureStore) {
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featSet = featureStore.getFeatureSet(getFeatureQuery()); |
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} |
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} catch (DataException e) {
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throw new RuntimeException("Error getting a feature set with the query " + getFeatureQuery()); |
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} |
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} |
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return featSet;
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} |
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@Override
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public DynObjectSet getDynObjectSet() {
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return getFeatureSet(false).getDynObjectSet(); |
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} |
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@Override
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public void reloadCurrentPage() throws BaseException { |
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boolean sel_up = this.isSelectionUp(); |
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setSelectionUp(false);
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if (getCalculator().getCurrentPage() > -1) { |
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this.cachedPages.clear();
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loadCurrentPageData(); |
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} |
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|
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if (sel_up) {
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setSelectionUp(true);
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} |
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} |
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|
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@Override
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public void reload() throws BaseException { |
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|
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this.cachedPages.clear();
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/*
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* Force re-creation of feature set
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*/
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this.getFeatureSet(true); |
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|
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|
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setDefaultCalculator(new Sizeable() {
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public long getSize() { |
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FeatureSet featureSet = getFeatureSet(false);
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try {
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return featureSet.getSize();
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} catch (BaseException e) {
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LOG.error("Error getting the size of the FeatureSet: "
|
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+ featureSet, e); |
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return 0l; |
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} |
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} |
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}, getCalculator().getMaxPageSize()); |
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reloadCurrentPage(); |
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} |
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|
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public FeatureStore getFeatureStore() {
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return featureStore;
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} |
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|
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public FeatureQuery getFeatureQuery() {
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return query;
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} |
447 |
|
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/**
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* Loads all the Features of the current page.
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* @throws org.gvsig.tools.exception.BaseException
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*/
|
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@Override
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protected synchronized void loadCurrentPageData() throws BaseException { |
454 |
if( !initialization_completed ) {
|
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return;
|
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} |
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final int currentPageSize = getCalculator().getCurrentPageSize(); |
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final long currentPage = getCalculator().getCurrentPage(); |
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Page page = this.cachedPages.get(currentPage);
|
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if( page==null ) { |
461 |
page = new Page(currentPage, currentPageSize);
|
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|
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long t1 = 0; |
464 |
if (LOG.isTraceEnabled()) {
|
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t1 = System.currentTimeMillis();
|
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} |
467 |
|
468 |
if (selectionUp) {
|
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loadCurrentPageDataWithSelectionUp(page); |
470 |
} else {
|
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loadCurrentPageDataNoSelection(page); |
472 |
} |
473 |
|
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if (LOG.isTraceEnabled()) {
|
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long t2 = System.currentTimeMillis(); |
476 |
LOG.trace("Time to load {} features: {} ms", currentPageSize, t2 - t1);
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} |
478 |
this.cachedPages.add(page);
|
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} |
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this.features = page.getFeatures();
|
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} |
482 |
|
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private void loadCurrentPageDataWithSelectionUp(final Page page) |
484 |
throws BaseException {
|
485 |
FeatureSelection selection = initialSelection; |
486 |
if (selection == null) { |
487 |
loadCurrentPageDataNoSelection(page); |
488 |
} else {
|
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FeatureSet set = getFeatureSet(false);
|
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try {
|
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OneSubsetOneSetPagingCalculator twoSetsCalculator = null;
|
492 |
if (getCalculator() instanceof OneSubsetOneSetPagingCalculator) { |
493 |
twoSetsCalculator |
494 |
= (OneSubsetOneSetPagingCalculator) getCalculator(); |
495 |
} else {
|
496 |
twoSetsCalculator |
497 |
= new OneSubsetOneSetPagingCalculator(
|
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new FeatureSetSizeableDelegate(selection),
|
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new FeatureSetSizeableDelegate(set),
|
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getMaxPageSize(), getCalculator().getCurrentPage()); |
501 |
setCalculator(twoSetsCalculator); |
502 |
} |
503 |
|
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// First load values from the selection, if the current page has
|
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// elements from it
|
506 |
if (twoSetsCalculator.hasCurrentPageAnyValuesInFirstSet()) {
|
507 |
loadDataFromFeatureSet(page, 0, selection,
|
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twoSetsCalculator.getFirstSetInitialIndex(), |
509 |
twoSetsCalculator.getFirstSetHowMany(), null);
|
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} |
511 |
// Next, load values from the FeatureSet if the current page has values
|
512 |
// from it
|
513 |
if (twoSetsCalculator.hasCurrentPageAnyValuesInSecondSet()) {
|
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loadDataFromFeatureSet( |
515 |
page, |
516 |
// The cast will work as that size will be <= maxpagesize,
|
517 |
// which is an int
|
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(int) twoSetsCalculator.getFirstSetHowMany(), set,
|
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twoSetsCalculator.getSecondSetInitialIndex(), |
520 |
twoSetsCalculator.getSecondSetHowMany(), selection); |
521 |
} |
522 |
} finally {
|
523 |
/*
|
524 |
* This is the feature set
|
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* we dont want to lose it
|
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*/
|
527 |
// set.dispose();
|
528 |
} |
529 |
} |
530 |
} |
531 |
|
532 |
private void loadCurrentPageDataNoSelection(final Page page) |
533 |
throws BaseException {
|
534 |
|
535 |
long firstPosition = getCalculator().getInitialIndex();
|
536 |
|
537 |
if (LOG.isDebugEnabled()) {
|
538 |
LOG.debug("Loading {} Features starting at position {}",
|
539 |
getCalculator().getCurrentPageSize(), firstPosition |
540 |
); |
541 |
} |
542 |
|
543 |
FeatureSet featureSet = getFeatureSet(false);
|
544 |
try {
|
545 |
loadDataFromFeatureSet(page, 0, featureSet, firstPosition,
|
546 |
getCalculator().getCurrentPageSize(), null);
|
547 |
} catch(DataException ex) {
|
548 |
throw ex;
|
549 |
// } finally {
|
550 |
// featureSet.dispose();
|
551 |
} |
552 |
|
553 |
} |
554 |
|
555 |
private void loadDataFromFeatureSet(final Page page, |
556 |
final int valuesPosition, FeatureSet set, long initialIndex, |
557 |
final long howMany, final FeatureSelection selectedFeaturesToSkip) |
558 |
throws DataException {
|
559 |
|
560 |
try {
|
561 |
final MutableBoolean errorReported = new MutableBoolean(false); |
562 |
set.accept(new Visitor() {
|
563 |
private int i = valuesPosition; |
564 |
|
565 |
@Override
|
566 |
public void visit(Object obj) throws VisitCanceledException, |
567 |
BaseException { |
568 |
if (i >= valuesPosition + howMany) {
|
569 |
throw new VisitCanceledException(); |
570 |
} |
571 |
Feature current = (Feature) obj; |
572 |
// Add the current Feature only if we don't skip selected
|
573 |
// features or the feature is not selected
|
574 |
if (selectedFeaturesToSkip == null |
575 |
|| !selectedFeaturesToSkip.isSelected(current)) { |
576 |
try {
|
577 |
page.setFeature(i,current.getCopy()); |
578 |
i++; |
579 |
} catch(Exception ex) { |
580 |
// Aqui no deberia petar, pero...
|
581 |
// me he encontrado un caso que tenia una referencia a
|
582 |
// una feature seleccionada que ya no existia. No se como
|
583 |
// habia pasado, se habia quedado de antes guardada en el
|
584 |
// proyecto pero la feature ya no existia, y eso hacia que
|
585 |
// petase al intentar leer de disco la feature a partir
|
586 |
// de una referencia no valida.
|
587 |
if( !errorReported.booleanValue() ) {
|
588 |
// Solo sacamos un error por pagina de datos.
|
589 |
LOG.warn("Problemas recuperando feature.",ex);
|
590 |
errorReported.setTrue(); |
591 |
} |
592 |
} |
593 |
} |
594 |
} |
595 |
}, initialIndex, howMany); |
596 |
} catch(VisitCanceledException ex) {
|
597 |
// Do nothing
|
598 |
} catch (BaseException e) {
|
599 |
if (e instanceof DataException) { |
600 |
throw ((DataException) e);
|
601 |
} else {
|
602 |
LOG.warn("Error loading the data starting at position {}",
|
603 |
new Long(initialIndex), e); |
604 |
} |
605 |
} |
606 |
} |
607 |
|
608 |
public void delete(Feature feature) throws BaseException { |
609 |
featureStore.delete(feature); |
610 |
/*
|
611 |
* Force re-creation of feature set
|
612 |
*/
|
613 |
this.getFeatureSet(true); |
614 |
|
615 |
reloadCurrentPage(); |
616 |
} |
617 |
|
618 |
public void insert(EditableFeature feature) throws BaseException { |
619 |
featureStore.insert(feature); |
620 |
/*
|
621 |
* Force re-creation of feature set
|
622 |
*/
|
623 |
this.getFeatureSet(true); |
624 |
|
625 |
reloadCurrentPage(); |
626 |
} |
627 |
|
628 |
public boolean isEmpty() { |
629 |
try {
|
630 |
return getFeatureSet(false).isEmpty(); |
631 |
} catch (ConcurrentDataModificationException ex) {
|
632 |
LOG.warn("ConcurrentDataModification error asking about the emptiness of the list. Retrying reloading data.");
|
633 |
try {
|
634 |
reload(); |
635 |
} catch (BaseException e) {
|
636 |
LOG.warn("Error reloading data.", e);
|
637 |
throw new RuntimeException(e); |
638 |
} |
639 |
try {
|
640 |
return getFeatureSet(false).isEmpty(); |
641 |
} catch (DataException e) {
|
642 |
LOG.warn("Error asking about the emptiness of the list after reloading data.",e);
|
643 |
throw new RuntimeException(e); |
644 |
} |
645 |
} catch (DataException ex) {
|
646 |
throw new RuntimeException(ex); |
647 |
} |
648 |
} |
649 |
|
650 |
public void update(EditableFeature feature) throws BaseException { |
651 |
featureStore.update(feature); |
652 |
/*
|
653 |
* Force re-creation of feature set
|
654 |
*/
|
655 |
this.getFeatureSet(true); |
656 |
|
657 |
reloadCurrentPage(); |
658 |
} |
659 |
|
660 |
public FeatureType getFeatureType() {
|
661 |
|
662 |
FeatureType ft = null;
|
663 |
|
664 |
try {
|
665 |
ft = featureStore.getDefaultFeatureType(); |
666 |
} catch (DataException e) {
|
667 |
LOG.error("Error while getting feature type: " +
|
668 |
e.getMessage(), e); |
669 |
} |
670 |
return ft;
|
671 |
|
672 |
/*
|
673 |
*
|
674 |
FeatureSet featureSet = getFeatureSet();
|
675 |
try {
|
676 |
return featureSet.getDefaultFeatureType();
|
677 |
} finally {
|
678 |
featureSet.dispose();
|
679 |
}
|
680 |
*/
|
681 |
|
682 |
|
683 |
} |
684 |
|
685 |
protected void doDispose() throws BaseException { |
686 |
initialSelection.dispose(); |
687 |
if (featSet != null) { |
688 |
try {
|
689 |
featSet.dispose(); |
690 |
} catch (Exception ex) { |
691 |
LOG.info("Error while disposing featset.", ex);
|
692 |
} |
693 |
} |
694 |
} |
695 |
|
696 |
public DynObject[] getCurrentPageDynObjects() { |
697 |
Feature[] features = getCurrentPageFeatures();
|
698 |
DynObject[] dynobjects = new DynObject[features.length]; |
699 |
for (int i = 0; i < dynobjects.length; i++) { |
700 |
dynobjects[i] = new DynObjectFeatureFacade(features[i]);
|
701 |
} |
702 |
return dynobjects;
|
703 |
} |
704 |
|
705 |
@Override
|
706 |
public DynObject getDynObjectAt(long index) throws BaseException { |
707 |
return new DynObjectFeatureFacade(getFeatureAt(index)); |
708 |
} |
709 |
|
710 |
@Override
|
711 |
public List asList() { |
712 |
return new FeaturePagingHelperList(); |
713 |
} |
714 |
|
715 |
@Override
|
716 |
public List asListOfDynObjects() { |
717 |
return new DynObjectPagingHelperList(); |
718 |
} |
719 |
|
720 |
private class FeaturePagingHelperList extends PagingHelperList { |
721 |
@Override
|
722 |
public Object get(int i) { |
723 |
return this.get64(i); |
724 |
} |
725 |
|
726 |
@Override
|
727 |
public Object get64(long i) { |
728 |
try {
|
729 |
return getFeatureAt(i);
|
730 |
} catch (ConcurrentDataModificationException ex) {
|
731 |
LOG.warn("ConcurrentDataModification error getting feature "+i+" of the list. Retrying reloading data."); |
732 |
try {
|
733 |
reload(); |
734 |
} catch (BaseException e) {
|
735 |
LOG.warn("Error reloading data.", e);
|
736 |
throw new RuntimeException(e); |
737 |
} |
738 |
try {
|
739 |
return getFeatureAt(i);
|
740 |
} catch (Exception e) { |
741 |
LOG.warn("Error getting feature "+i+" of the list after reloading data.",e); |
742 |
throw new RuntimeException(e); |
743 |
} |
744 |
} catch (BaseException ex) {
|
745 |
throw new RuntimeException(ex); |
746 |
} |
747 |
} |
748 |
|
749 |
@Override
|
750 |
public Object set(int i, Object e) { |
751 |
// Feature newFeature = (Feature) e;
|
752 |
// EditableFeature oldFeature = ((Feature) this.get(i)).getEditable();
|
753 |
// oldFeature.copyFrom(newFeature);
|
754 |
// update(oldFeature);
|
755 |
return super.set(i, e); |
756 |
} |
757 |
|
758 |
@Override
|
759 |
public Object remove(int i) { |
760 |
// Feature feature = (Feature) this.get(i);
|
761 |
// delete(feature);
|
762 |
return super.remove(i); |
763 |
} |
764 |
|
765 |
@Override
|
766 |
public boolean add(Object e) { |
767 |
// EditableFeature feature = (EditableFeature) e;
|
768 |
// insert(feature);
|
769 |
return super.add(e); |
770 |
} |
771 |
} |
772 |
|
773 |
private class DynObjectPagingHelperList extends PagingHelperList { |
774 |
@Override
|
775 |
public Object get(int i) { |
776 |
return this.get64(i); |
777 |
} |
778 |
|
779 |
@Override
|
780 |
public Object get64(long position) { |
781 |
try {
|
782 |
return getDynObjectAt(position);
|
783 |
} catch (ConcurrentDataModificationException ex) {
|
784 |
LOG.warn("ConcurrentDataModification error getting element "+position+" of the list. Retrying reloading data."); |
785 |
try {
|
786 |
reload(); |
787 |
} catch (BaseException e) {
|
788 |
LOG.warn("Error reloading data.", e);
|
789 |
throw new RuntimeException(e); |
790 |
} |
791 |
try {
|
792 |
return getDynObjectAt(position);
|
793 |
} catch (Exception e) { |
794 |
LOG.warn("Error getting element "+position+" of the list after reloading data.",e); |
795 |
throw new RuntimeException(e); |
796 |
} |
797 |
} catch (BaseException ex) {
|
798 |
throw new RuntimeException(ex); |
799 |
} |
800 |
} |
801 |
|
802 |
} |
803 |
|
804 |
private abstract class PagingHelperList implements List, FacadeOfAFeaturePagingHelper, UnmodifiableBasicList, UnmodifiableBasicList64 { |
805 |
|
806 |
@Override
|
807 |
public FeaturePagingHelper getFeaturePagingHelper() {
|
808 |
return FeaturePagingHelperImpl.this;
|
809 |
} |
810 |
|
811 |
@Override
|
812 |
public String toString() { |
813 |
return String.format("..(%d %ss)...", this.size(), featureStore.getName()); |
814 |
} |
815 |
|
816 |
@Override
|
817 |
public long size64() { |
818 |
try {
|
819 |
return getFeatureSet(false).getSize(); |
820 |
} catch (ConcurrentDataModificationException ex) {
|
821 |
LOG.warn("ConcurrentDataModification error asking the size of the list. Retrying reloading data.");
|
822 |
try {
|
823 |
reload(); |
824 |
} catch (BaseException e) {
|
825 |
LOG.warn("Error reloading data.", e);
|
826 |
throw new RuntimeException(e); |
827 |
} |
828 |
try {
|
829 |
return getFeatureSet(false).getSize(); |
830 |
} catch (DataException e) {
|
831 |
LOG.warn("Error asking the size of the list after reloading data.",e);
|
832 |
throw new RuntimeException(e); |
833 |
} |
834 |
} catch (DataException ex) {
|
835 |
throw new RuntimeException(ex); |
836 |
} |
837 |
} |
838 |
|
839 |
@Override
|
840 |
public int size() { |
841 |
long sz = this.size64(); |
842 |
if( sz>Integer.MAX_VALUE ) { |
843 |
sz = Integer.MAX_VALUE;
|
844 |
} |
845 |
return (int) sz; |
846 |
} |
847 |
|
848 |
@Override
|
849 |
public boolean isEmpty() { |
850 |
try {
|
851 |
return getFeatureSet(false).isEmpty(); |
852 |
} catch (ConcurrentDataModificationException ex) {
|
853 |
LOG.warn("ConcurrentDataModification error asking about the emptiness of the list. Retrying reloading data.");
|
854 |
try {
|
855 |
reload(); |
856 |
} catch (BaseException e) {
|
857 |
LOG.warn("Error reloading data.", e);
|
858 |
throw new RuntimeException(e); |
859 |
} |
860 |
try {
|
861 |
return getFeatureSet(false).isEmpty(); |
862 |
} catch (DataException e) {
|
863 |
LOG.warn("Error asking about the emptiness of the list after reloading data.",e);
|
864 |
throw new RuntimeException(e); |
865 |
} |
866 |
} catch (DataException ex) {
|
867 |
throw new RuntimeException(ex); |
868 |
} |
869 |
} |
870 |
|
871 |
@Override
|
872 |
public Iterator iterator() { |
873 |
try {
|
874 |
return getFeatureSet(false).fastIterator(); |
875 |
} catch (ConcurrentDataModificationException ex) {
|
876 |
LOG.warn("ConcurrentDataModification error getting iterator of the list. Retrying reloading data.");
|
877 |
try {
|
878 |
reload(); |
879 |
} catch (BaseException e) {
|
880 |
LOG.warn("Error reloading data.", e);
|
881 |
throw new RuntimeException(e); |
882 |
} |
883 |
try {
|
884 |
return getFeatureSet(false).fastIterator(); |
885 |
} catch (DataException e) {
|
886 |
LOG.warn("Error getting iterator of the list after reloading data.",e);
|
887 |
throw new RuntimeException(e); |
888 |
} |
889 |
} catch (DataException ex) {
|
890 |
throw new RuntimeException(ex); |
891 |
} |
892 |
} |
893 |
|
894 |
@Override
|
895 |
public boolean contains(Object o) { |
896 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
897 |
} |
898 |
|
899 |
@Override
|
900 |
public Object[] toArray() { |
901 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
902 |
} |
903 |
|
904 |
@Override
|
905 |
public Object[] toArray(Object[] ts) { |
906 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
907 |
} |
908 |
|
909 |
@Override
|
910 |
public boolean add(Object e) { |
911 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
912 |
} |
913 |
|
914 |
@Override
|
915 |
public boolean remove(Object o) { |
916 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
917 |
} |
918 |
|
919 |
@Override
|
920 |
public boolean containsAll(Collection clctn) { |
921 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
922 |
} |
923 |
|
924 |
@Override
|
925 |
public boolean addAll(Collection clctn) { |
926 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
927 |
} |
928 |
|
929 |
@Override
|
930 |
public boolean addAll(int i, Collection clctn) { |
931 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
932 |
} |
933 |
|
934 |
@Override
|
935 |
public boolean removeAll(Collection clctn) { |
936 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
937 |
} |
938 |
|
939 |
@Override
|
940 |
public boolean retainAll(Collection clctn) { |
941 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
942 |
} |
943 |
|
944 |
@Override
|
945 |
public void clear() { |
946 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
947 |
} |
948 |
|
949 |
@Override
|
950 |
public Object set(int i, Object e) { |
951 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
952 |
} |
953 |
|
954 |
@Override
|
955 |
public void add(int i, Object e) { |
956 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
957 |
} |
958 |
|
959 |
@Override
|
960 |
public Object remove(int i) { |
961 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
962 |
} |
963 |
|
964 |
@Override
|
965 |
public int indexOf(Object o) { |
966 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
967 |
} |
968 |
|
969 |
@Override
|
970 |
public int lastIndexOf(Object o) { |
971 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
972 |
} |
973 |
|
974 |
@Override
|
975 |
public ListIterator listIterator() { |
976 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
977 |
} |
978 |
|
979 |
@Override
|
980 |
public ListIterator listIterator(int i) { |
981 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
982 |
} |
983 |
|
984 |
@Override
|
985 |
public List subList(int i, int i1) { |
986 |
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
987 |
} |
988 |
|
989 |
@Override
|
990 |
public List toList() { |
991 |
return this; |
992 |
} |
993 |
|
994 |
} |
995 |
} |