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 / impl / DefaultFeatureQuery.java @ 44727
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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.impl; |
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|
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import org.apache.commons.lang3.ArrayUtils; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.Expression; |
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import org.gvsig.expressionevaluator.ExpressionUtils; |
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import org.gvsig.fmap.dal.DataTypes; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.expressionevaluator.ExpressionEvaluator; |
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.FeatureQuery; |
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import org.gvsig.fmap.dal.feature.FeatureQueryOrder; |
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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.impl.expressionevaluator.DefaultExpressionEvaluator; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dynobject.DynStruct; |
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import org.gvsig.tools.evaluator.AndEvaluator; |
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import org.gvsig.tools.evaluator.Evaluator; |
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import org.gvsig.tools.evaluator.EvaluatorFieldsInfo; |
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import org.gvsig.tools.persistence.PersistentState; |
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import org.gvsig.tools.persistence.exception.PersistenceException; |
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/**
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* Defines the properties of a collection of Features, as a result of a query
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* through a FeatureStore.
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* <p>
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* A FeatureQuery is always defined by a FeatureType, or by the list of
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* attribute names of the FeatureStore to return.
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* </p>
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* <p>
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* The filter allows to select Features whose properties have values with the
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* characteristics defined by the filter.
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* </p>
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* <p>
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* The order is used to set the order of the result FeatureCollection, based on
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* the values of the properties of the Features.
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* </p>
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* <p>
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* The scale parameter can be used by the FeatureStore as a hint about the
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* quality or resolution of the data needed to view or operate with the data
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* returned. As an example, the FeatureStore may use the scale to return only a
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* representative subset of the data, or maybe to return Features with less
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* detail, like a point or a line instead of a polygon.
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* </p>
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* <p>
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* If an implementation of FeatureStore is able to get other parameters to
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* customize the behavior of the getDataCollection methods, there is an option
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* to set more parameters through the setAttribute method.
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* </p>
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*
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* @author 2009- <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team
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*/
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public class DefaultFeatureQuery implements FeatureQuery { |
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public static final String SCALE_PARAM_NAME = "Scale"; |
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private Map<String,Object> queryParameters = new HashMap(); |
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private String featureTypeId = null; |
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private List<String> attributeNames = new ArrayList(); |
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private List<String> constantsAttributeNames = new ArrayList(); |
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private Evaluator filter;
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private FeatureQueryOrder order = new FeatureQueryOrder(); |
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private long limit; |
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private long pageSize; |
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private List<String> groupByColumns; |
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private Map<String,String> aggregateFunctions; |
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/**
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* Creates a FeatureQuery which will load all available Features of a type.
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*
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*/
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public DefaultFeatureQuery() {
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super();
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} |
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/**
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* Creates a FeatureQuery which will load all available Features of a type.
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*
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* @param featureType
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* the type of Features of the query
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*/
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public DefaultFeatureQuery(FeatureType featureType) {
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super();
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this.setFeatureType(featureType);
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} |
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/**
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* Creates a FeatureQuery with the type of features, a filter and the order
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* for the FeatureCollection.
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*
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* @param featureType
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* the type of Features of the query
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* @param filter
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* based on the properties of the Features
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*/
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public DefaultFeatureQuery(FeatureType featureType, Evaluator filter) {
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super();
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this.setFeatureType(featureType);
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this.filter = filter;
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} |
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/**
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* Creates a FeatureQuery with the type of features, a filter, the order for
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* the FeatureCollection and the view scale.
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*
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* @param featureType
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* the type of Features of the query
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* @param filter
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* based on the properties of the Features
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* @param scale
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* to view the Features.
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*/
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public DefaultFeatureQuery(FeatureType featureType, Evaluator filter,
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double scale) {
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this.setFeatureType(featureType);
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this.filter = filter;
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this.setScale(scale);
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} |
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/**
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* Creates a FeatureQuery which will load a list of attribute names of all
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* available Features.
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*
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* @param attributeNames
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* the list of attribute names to load
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*/
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public DefaultFeatureQuery(String[] attributeNames) { |
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super();
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setAttributeNames(attributeNames); |
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} |
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/**
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* Creates a FeatureQuery with the list of attribute names of feature, a
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* filter and the order for the FeatureCollection.
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*
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* @param attributeNames
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* the list of attribute names to load
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* @param filter
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* based on the properties of the Features
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*/
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public DefaultFeatureQuery(String[] attributeNames, Evaluator filter) { |
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super();
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setAttributeNames(attributeNames); |
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this.filter = filter;
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} |
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/**
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* Creates a FeatureQuery with the list of attribute names of feature, a
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* filter, the order for the FeatureCollection and the view scale.
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*
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* @param attributeNames
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* the list of attribute names to load
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* @param filter
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* based on the properties of the Features
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* @param scale
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* to view the Features.
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*/
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public DefaultFeatureQuery(String[] attributeNames, Evaluator filter, |
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double scale) {
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setAttributeNames(attributeNames); |
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this.filter = filter;
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this.setScale(scale);
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} |
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@Override
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public double getScale() { |
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Double scale = (Double) this.getQueryParameter(SCALE_PARAM_NAME); |
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if (scale == null) { |
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return 0; |
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} |
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return scale;
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} |
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@Override
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public void setScale(double scale) { |
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this.setQueryParameter(SCALE_PARAM_NAME, scale);
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} |
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@Override
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public Object getQueryParameter(String name) { |
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return queryParameters.get(name);
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} |
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@Override
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public void setQueryParameter(String name, Object value) { |
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queryParameters.put(name, value); |
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} |
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@Override
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public void setFeatureType(FeatureType featureType) { |
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this.featureTypeId = featureType.getId();
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} |
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@Override
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public String[] getAttributeNames() { |
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return (String[])attributeNames.toArray(new String[attributeNames.size()]); |
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} |
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@Override
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public void setAttributeNames(String[] attributeNames) { |
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this.attributeNames.clear();
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if (attributeNames != null){ |
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for (int i=0 ; i<attributeNames.length ; i++){ |
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this.attributeNames.add(attributeNames[i]);
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} |
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} |
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} |
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@Override
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public void retrievesAllAttributes() { |
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this.attributeNames.clear();
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} |
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@Override
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public void addAttributeName(String attributeName){ |
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//If the attribute exists finish the method
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for (int i=0 ; i<attributeNames.size() ; i++){ |
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if (attributeNames.get(i).equals(attributeName)){
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return;
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} |
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} |
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this.attributeNames.add(attributeName);
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} |
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@Override
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public void addEssentialAttributeNames(FeatureStore store) { |
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FeatureType storeType; |
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try {
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storeType = store.getDefaultFeatureType(); |
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} catch (DataException ex) {
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throw new RuntimeException("Can't access to the default feature type of tghe store", ex); |
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} |
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FeatureAttributeDescriptor[] pks = storeType.getPrimaryKey();
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if( storeType.hasOID() || ArrayUtils.isEmpty(pks) ) {
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FeatureAttributeDescriptor attrInt = null;
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FeatureAttributeDescriptor attrStr = null;
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FeatureAttributeDescriptor attrNotGeom = null;
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for (FeatureAttributeDescriptor attr : storeType) {
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if( attrInt == null && (attr.getType()==DataTypes.INT || attr.getType()==DataTypes.LONG) ) { |
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attrInt = attr; |
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} else if( attrStr == null && attr.getType()==DataTypes.STRING ) { |
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attrStr = attr; |
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} else if( attrNotGeom == null && attr.getType()!=DataTypes.GEOMETRY ) { |
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attrNotGeom = attr; |
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} |
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} |
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if( attrInt != null ) { |
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this.addAttributeName(attrInt.getName());
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} else if( attrStr != null ) { |
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this.addAttributeName(attrStr.getName());
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} else if( attrNotGeom != null ) { |
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this.addAttributeName(attrNotGeom.getName());
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} else {
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this.addAttributeName(storeType.getAttributeDescriptor(0).getName()); |
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} |
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} else {
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for(FeatureAttributeDescriptor attr : pks ) {
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this.addAttributeName(attr.getName());
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} |
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} |
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} |
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@Override
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public void addPrimaryKeyAttributeNames(FeatureStore store) { |
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FeatureType storeType; |
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try {
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storeType = store.getDefaultFeatureType(); |
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} catch (DataException ex) {
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throw new RuntimeException("Can't access to the default feature type of tghe store", ex); |
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} |
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for(FeatureAttributeDescriptor attr : storeType.getPrimaryKey() ) {
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this.addAttributeName(attr.getName());
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} |
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} |
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@Override
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public boolean hasAttributeNames() { |
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return !this.attributeNames.isEmpty(); |
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} |
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@Override
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public void clearAttributeNames() { |
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this.attributeNames = new ArrayList(); |
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} |
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@Override
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public Evaluator getFilter() {
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return filter;
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} |
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@Override
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public Expression getExpressionFilter() { |
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if( this.filter instanceof ExpressionEvaluator ) { |
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return ((ExpressionEvaluator)this.filter).getExpression(); |
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} |
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return null; |
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} |
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@Override
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public void setFilter(Expression filter) { |
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if( filter == null ) { |
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this.clearFilter();
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return;
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} |
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Evaluator x = new DefaultExpressionEvaluator(filter);
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this.setFilter(x);
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} |
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@Override
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public void setFilter(String filter) { |
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if( StringUtils.isEmpty(filter) ) {
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this.clearFilter();
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return;
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} |
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try {
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this.setFilter(ExpressionUtils.createExpression(filter));
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} catch (Exception ex) { |
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throw new RuntimeException("Can't create filter from '"+filter+"'",ex); |
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} |
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} |
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@Override
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public void setFilter(Evaluator filter) { |
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if( filter == null ) { |
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this.clearFilter();
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return;
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} |
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this.filter = filter;
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addFilterAttributes(filter); |
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} |
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@Override
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public void addFilter(String filter) { |
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if( StringUtils.isEmpty(filter) ) {
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return;
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} |
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this.addFilter(ExpressionUtils.createExpression(filter));
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} |
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@Override
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public void addFilter(Expression filter) { |
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Evaluator x = new DefaultExpressionEvaluator(filter);
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this.addFilter(x);
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} |
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@Override
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public void addFilter(Evaluator evaluator) { |
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if (evaluator == null) { |
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return;
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} |
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if (this.filter == null) { |
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this.filter = evaluator;
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} else {
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if (this.filter instanceof AndEvaluator) { |
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((AndEvaluator) this.filter).addEvaluator(evaluator);
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} else {
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this.filter = new AndEvaluator(this.filter); |
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((AndEvaluator) this.filter).addEvaluator(evaluator);
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} |
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} |
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addFilterAttributes(evaluator); |
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} |
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@Override
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public void clearFilter() { |
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this.filter = null; |
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} |
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private void addFilterAttributes(Evaluator evaluator){ |
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if (evaluator != null){ |
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EvaluatorFieldsInfo fieldsInfo = evaluator.getFieldsInfo(); |
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if (fieldsInfo == null){ |
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// FieldsInfo is not available in this evaluator
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return;
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} |
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String[] fieldNames = fieldsInfo.getFieldNames(); |
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if (fieldNames== null){ |
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// fieldNames is not available in this evaluator
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return;
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} |
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for (int i=0 ; i<fieldNames.length ; i++){ |
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addAttributeName(fieldNames[i]); |
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} |
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} |
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} |
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|
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@Override
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public FeatureQueryOrder getOrder() {
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return order;
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} |
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|
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@Override
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public void setOrder(FeatureQueryOrder order) { |
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this.order = order;
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} |
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|
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@Override
|
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public boolean hasFilter() { |
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return this.filter != null; |
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} |
439 |
|
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@Override
|
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public boolean hasOrder() { |
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return this.order != null && this.order.size() > 0; |
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} |
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|
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@Override
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public Object clone() throws CloneNotSupportedException { |
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DefaultFeatureQuery clone = (DefaultFeatureQuery) super.clone();
|
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|
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// Clone attribute names array
|
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if (attributeNames != null) { |
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clone.attributeNames = new ArrayList(); |
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for (int i=0 ; i<attributeNames.size() ; i++){ |
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clone.attributeNames.add(attributeNames.get(i)); |
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} |
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} |
456 |
|
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// Clone order
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if (order != null) { |
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clone.order = (FeatureQueryOrder) order.clone(); |
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} |
461 |
|
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return clone;
|
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} |
464 |
|
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@Override
|
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public FeatureQuery getCopy() {
|
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try {
|
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return (FeatureQuery) clone();
|
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} catch (CloneNotSupportedException e) { |
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// TODO Auto-generated catch block
|
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e.printStackTrace(); |
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return null; |
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} |
474 |
// DefaultFeatureQuery aCopy = new DefaultFeatureQuery();
|
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//
|
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// aCopy.featureTypeId = this.featureTypeId;
|
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//
|
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// if (this.attributeNames != null) {
|
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// aCopy.attributeNames = (String[]) Arrays
|
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// .asList(this.attributeNames).toArray(new String[0]);
|
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// }
|
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//
|
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// aCopy.filter = this.filter;
|
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//
|
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// if (this.order != null) {
|
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// aCopy.order = this.order.getCopy();
|
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// }
|
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//
|
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// return aCopy;
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} |
491 |
|
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@Override
|
493 |
public String getFeatureTypeId() { |
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return featureTypeId;
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} |
496 |
|
497 |
@Override
|
498 |
public void setFeatureTypeId(String featureTypeId) { |
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this.featureTypeId = featureTypeId;
|
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} |
501 |
|
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@Override
|
503 |
public void saveToState(PersistentState state) throws PersistenceException { |
504 |
// FIXME: falta por terminar de implementar
|
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state.set("queryParameters", this.queryParameters); |
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state.set("featureTypeId", this.featureTypeId); |
507 |
state.set("attributeNames", this.attributeNames); |
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// state.set("filter", this.filter);
|
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state.set("limit", this.limit); |
510 |
state.set("pageSize", this.pageSize); |
511 |
|
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} |
513 |
|
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@Override
|
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public void loadFromState(PersistentState state) throws PersistenceException { |
516 |
// FIXME: falta por terminar de implementar
|
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this.queryParameters = (Map) state.get("queryParameters"); |
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this.featureTypeId = state.getString("featureTypeId"); |
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this.attributeNames = state.getList("attributeNames"); |
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this.filter = (Evaluator) state.get("filter"); |
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this.limit = state.getLong("limit"); |
522 |
this.pageSize = state.getLong("pageSize"); |
523 |
|
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} |
525 |
|
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/**
|
527 |
* Register the class on PersistenceManager
|
528 |
*
|
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*/
|
530 |
public static void registerPersistent() { |
531 |
DynStruct definition = |
532 |
ToolsLocator.getPersistenceManager() |
533 |
.addDefinition(DefaultFeatureQuery.class, |
534 |
"DefaultFeatureQuery",
|
535 |
"DefaultFeatureQuery Persistent definition",
|
536 |
null,
|
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null);
|
538 |
|
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definition.addDynFieldMap("queryParameters")
|
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.setClassOfItems(Object.class)
|
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.setMandatory(true);
|
542 |
|
543 |
definition.addDynFieldString("featureTypeId").setMandatory(false); |
544 |
|
545 |
definition.addDynFieldList("attributeNames")
|
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.setClassOfItems(String.class)
|
547 |
.setMandatory(false);
|
548 |
|
549 |
definition.addDynFieldObject("filter")
|
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.setClassOfValue(Evaluator.class) |
551 |
.setMandatory(false);
|
552 |
|
553 |
definition.addDynFieldObject("order")
|
554 |
.setClassOfValue(FeatureQueryOrder.class) |
555 |
.setMandatory(false);
|
556 |
|
557 |
definition.addDynFieldLong("limit").setMandatory(false); |
558 |
|
559 |
definition.addDynFieldLong("pageSize").setMandatory(false); |
560 |
|
561 |
} |
562 |
|
563 |
@Override
|
564 |
public long getLimit() { |
565 |
return limit;
|
566 |
} |
567 |
|
568 |
@Override
|
569 |
public long getPageSize() { |
570 |
return pageSize;
|
571 |
} |
572 |
|
573 |
@Override
|
574 |
public void setLimit(long limit) { |
575 |
this.limit = limit;
|
576 |
} |
577 |
|
578 |
@Override
|
579 |
public void setPageSize(long pageSize) { |
580 |
this.pageSize = pageSize;
|
581 |
} |
582 |
|
583 |
@Override
|
584 |
public String[] getConstantsAttributeNames() { |
585 |
return (String[])constantsAttributeNames.toArray(new String[constantsAttributeNames.size()]); |
586 |
} |
587 |
|
588 |
@Override
|
589 |
public void setConstantsAttributeNames(String[] constantsAttributeNames) { |
590 |
this.constantsAttributeNames.clear();
|
591 |
if (constantsAttributeNames != null){ |
592 |
for (int i=0 ; i<constantsAttributeNames.length ; i++){ |
593 |
this.constantsAttributeNames.add(constantsAttributeNames[i]);
|
594 |
} |
595 |
} |
596 |
} |
597 |
|
598 |
@Override
|
599 |
public void addConstantAttributeName(String attributeName) { |
600 |
//If the attribute exists finish the method
|
601 |
for (int i=0 ; i<constantsAttributeNames.size() ; i++){ |
602 |
if (constantsAttributeNames.get(i).equals(attributeName)){
|
603 |
return;
|
604 |
} |
605 |
} |
606 |
this.constantsAttributeNames.add(attributeName);
|
607 |
} |
608 |
|
609 |
@Override
|
610 |
public boolean hasConstantsAttributeNames() { |
611 |
return !this.constantsAttributeNames.isEmpty(); |
612 |
} |
613 |
|
614 |
@Override
|
615 |
public void clearConstantsAttributeNames() { |
616 |
this.constantsAttributeNames = new ArrayList(); |
617 |
} |
618 |
|
619 |
@Override
|
620 |
public boolean isAGroupByColumn(String name) { |
621 |
for (String columnName : groupByColumns) { |
622 |
if( StringUtils.equalsIgnoreCase(name, columnName) ) {
|
623 |
return true; |
624 |
} |
625 |
} |
626 |
return false; |
627 |
} |
628 |
|
629 |
@Override
|
630 |
public List<String> getGroupByColumns() { |
631 |
if( this.groupByColumns == null ) { |
632 |
this.groupByColumns = new ArrayList<>(); |
633 |
} |
634 |
return this.groupByColumns; |
635 |
} |
636 |
|
637 |
@Override
|
638 |
public Map<String, String> getAggregateFunctions() { |
639 |
if( this.aggregateFunctions == null ) { |
640 |
this.aggregateFunctions = new HashMap<>(); |
641 |
} |
642 |
return this.aggregateFunctions; |
643 |
} |
644 |
|
645 |
@Override
|
646 |
public String getAggregate(String name) { |
647 |
String fn = this.aggregateFunctions.get(name); |
648 |
if( StringUtils.isAlphanumeric(fn) ) {
|
649 |
return fn + "(\""+ name + "\")"; |
650 |
} |
651 |
return fn;
|
652 |
} |
653 |
|
654 |
@Override
|
655 |
public boolean hasAggregateFunctions() { |
656 |
return this.aggregateFunctions == null || this.aggregateFunctions.isEmpty(); |
657 |
} |
658 |
|
659 |
@Override
|
660 |
public boolean hasGroupByColumns() { |
661 |
return this.groupByColumns != null && !this.groupByColumns.isEmpty(); |
662 |
} |
663 |
|
664 |
@Override
|
665 |
public void copyFrom(FeatureQuery query) { |
666 |
DefaultFeatureQuery other = (DefaultFeatureQuery) query; |
667 |
this.queryParameters.clear();
|
668 |
this.queryParameters.putAll(other.queryParameters);
|
669 |
|
670 |
this.featureTypeId = other.featureTypeId;
|
671 |
|
672 |
this.attributeNames.clear();
|
673 |
this.attributeNames.addAll(other.attributeNames);
|
674 |
|
675 |
this.constantsAttributeNames.clear();
|
676 |
this.constantsAttributeNames.addAll(other.constantsAttributeNames);
|
677 |
|
678 |
this.filter = other.filter;
|
679 |
|
680 |
this.order.copyFrom(other.order);
|
681 |
|
682 |
this.limit = other.limit;
|
683 |
|
684 |
this.pageSize = other.pageSize;
|
685 |
|
686 |
if( this.groupByColumns!=null && other.groupByColumns!=null ) { |
687 |
this.groupByColumns.clear();
|
688 |
this.groupByColumns.addAll(other.groupByColumns);
|
689 |
} else if( other.groupByColumns!=null ) { |
690 |
this.groupByColumns = new ArrayList<>(); |
691 |
this.groupByColumns.addAll(other.groupByColumns);
|
692 |
} else if( this.groupByColumns!=null ) { |
693 |
this.groupByColumns = null; |
694 |
} |
695 |
|
696 |
if( this.aggregateFunctions!=null && other.groupByColumns!=null ) { |
697 |
this.aggregateFunctions.clear();
|
698 |
this.aggregateFunctions.putAll(other.aggregateFunctions);
|
699 |
} else if( other.groupByColumns!=null ) { |
700 |
this.aggregateFunctions = new HashMap<>(); |
701 |
this.aggregateFunctions.putAll(other.aggregateFunctions);
|
702 |
} else if( this.groupByColumns!=null ) { |
703 |
this.groupByColumns=null; |
704 |
} |
705 |
} |
706 |
|
707 |
} |