svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.plugin / org.gvsig.daltransform.app / org.gvsig.daltransform.app.join / src / main / java / org / gvsig / app / join / dal / feature / JoinTransform.java @ 44978
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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.app.join.dal.feature; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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import java.util.Objects; |
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import java.util.logging.Level; |
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import org.apache.commons.lang3.StringUtils; |
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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.feature.AbstractFeatureStoreTransform; |
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import org.gvsig.fmap.dal.feature.EditableFeature; |
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import org.gvsig.fmap.dal.feature.EditableFeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.EditableFeatureType; |
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import org.gvsig.fmap.dal.feature.Feature; |
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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.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.SetReadOnlyAttributeException; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dataTypes.Coercion; |
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import org.gvsig.tools.dataTypes.CoercionContext; |
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import org.gvsig.tools.dataTypes.CoercionException; |
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import org.gvsig.tools.dataTypes.DataType; |
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import org.gvsig.tools.dispose.DisposableIterator; |
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import org.gvsig.tools.dynobject.DynStruct; |
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import org.gvsig.tools.evaluator.Evaluator; |
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import org.gvsig.tools.evaluator.EvaluatorData; |
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import org.gvsig.tools.evaluator.EvaluatorException; |
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import org.gvsig.tools.evaluator.EvaluatorFieldsInfo; |
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import org.gvsig.tools.observer.Observer; |
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import org.gvsig.tools.persistence.PersistenceManager; |
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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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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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public class JoinTransform |
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extends AbstractFeatureStoreTransform {
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private static final Logger logger = LoggerFactory.getLogger(JoinTransform.class); |
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public static final String PERSISTENCE_DEFINITION_NAME = "JoinTransform"; |
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/**
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* Store from which the join transform will get the additional attributes
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*/
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private FeatureStore store2;
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/**
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* name of the key attr in store1 that will be used to match features in
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* store2
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*/
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private String keyAttr1; |
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/**
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* name of the key attr in store2 that will be used to match features in
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* store1
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*/
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private String keyAttr2; |
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/**
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* names of the attributes to join from store2 to store1
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*/
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private String[] attrs; |
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/**
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* Attribute names may change after transformation a prefix is applied. This
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* map keeps correspondence between store1 original names and their
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* transformed counterparts.
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*/
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private final Map<String, String> store1NamesMap; |
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/**
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* Attribute names may change after transformation if they are repeated in
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* both stores or if a prefix is applied. This map keeps correspondence
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* between store2 original names and their transformed counterparts.
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*/
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private final Map<String, String> store2NamesMap; |
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private JoinTransformEvaluator evaluator = null; |
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private FeatureType originalFeatureType;
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private String[] attrsForQuery; |
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private String prefix1; |
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private String prefix2; |
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private CoercionContext attr1Context;
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/**
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* A default constructor
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*/
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public JoinTransform() {
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store1NamesMap = new HashMap<>(); |
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store2NamesMap = new HashMap<>(); |
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} |
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/**
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* Initializes all the necessary data for this transform
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*
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* @param store1 store whose default feature type is the target of this
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* transform
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*
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* @param store2 store whose default feature type will provide the new
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* attributes to join
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*
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* @param keyAttr1 key attribute in store1 that matches keyAttr2 in store2
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* (foreign key), used for joining both stores.
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*
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* @param keyAttr2 key attribute in store2 that matches keyAttr1 in store2
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* (foreign key), used for joining both stores.
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* @param prefix1
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* @param prefix2
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*
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* @param attrs names of the attributes in store2 that will be joined to
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* store1.
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*/
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public void setValues(FeatureStore store1, FeatureStore store2, |
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String keyAttr1, String keyAttr2, String prefix1, String prefix2, |
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String[] attrs) { |
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if( store1 == store2 ) {
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throw new IllegalArgumentException("store1 == store2"); |
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} |
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this.setFeatureStore(store1);
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this.store2 = store2;
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this.keyAttr1 = keyAttr1;
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this.keyAttr2 = keyAttr2;
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this.prefix1 = prefix1; // TODO |
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this.prefix2 = prefix2; // TODO |
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this.attrs = attrs;
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this.attr1Context = store1.getDefaultFeatureTypeQuietly().getAttributeDescriptor(this.keyAttr1).getCoercionContext(); |
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} |
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private boolean containsIgnoreCase(List<String>l, String item) { |
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for (String x : l) { |
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if( StringUtils.equalsIgnoreCase(item, x) ) {
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return true; |
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} |
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} |
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return false; |
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} |
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@Override
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public void setUp() throws Exception { |
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// calculate this transform resulting feature type
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// by adding all specified attrs from store2 to store1's default
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// feature type
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// FIXME for more than one FTypes ??
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this.originalFeatureType = this.getFeatureStore().getDefaultFeatureType(); |
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// keep index of geometry and att desc ==============
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int orig_geom_field_index
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= this.originalFeatureType.getDefaultGeometryAttributeIndex();
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FeatureAttributeDescriptor orig_geom_field_att |
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= this.originalFeatureType.getDefaultGeometryAttribute();
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// Create the feature type and copy the store 1 type
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EditableFeatureType editableFeatureType = this.getFeatureStore().getDefaultFeatureType().getEditable();
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FeatureAttributeDescriptor[] featureAttributeDescriptors = editableFeatureType.getAttributeDescriptors();
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for( int i = 0; i < featureAttributeDescriptors.length; i++ ) { |
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editableFeatureType.remove(featureAttributeDescriptors[i].getName()); |
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} |
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addFeatureType(editableFeatureType, featureAttributeDescriptors, prefix1, store1NamesMap); |
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// =========== set the new geom field name and restore geometry values
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if( orig_geom_field_index >= 0 ) { |
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EditableFeatureAttributeDescriptor ed_att = null;
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ed_att = (EditableFeatureAttributeDescriptor) editableFeatureType.getAttributeDescriptor(orig_geom_field_index); |
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ed_att.setSRS(orig_geom_field_att.getSRS()); |
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ed_att.setObjectClass(orig_geom_field_att.getObjectClass()); |
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ed_att.setGeometryType(orig_geom_field_att.getGeomType()); |
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ed_att.setDefaultValue(orig_geom_field_att.getDefaultValue()); |
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String new_geom_field_name = ed_att.getName();
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editableFeatureType.setDefaultGeometryAttributeName(new_geom_field_name); |
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} |
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// =====================================================================
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// Add the store 2 fields
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FeatureType featureType2 = store2.getDefaultFeatureType(); |
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// Add the fields
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for( int i = 0; i < attrs.length; i++ ) { |
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addFeatureType(editableFeatureType, featureType2.getAttributeDescriptor(attrs[i]), prefix2, store2NamesMap); |
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} |
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List<String> list1 = new ArrayList<>(); |
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for (String attr : this.attrs) { |
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if( !containsIgnoreCase(list1, attr) ) {
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list1.add(attr); |
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} |
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} |
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if( !containsIgnoreCase(list1, keyAttr2 ) ) {
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list1.add(keyAttr2); |
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} |
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List<String> list2 = new ArrayList<>(list1); |
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for (String attrname : list1) { |
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FeatureAttributeDescriptor attrdesc = featureType2.getAttributeDescriptor(attrname); |
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String[] requiredAttrs = attrdesc.getRequiredFieldNames(); |
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if( requiredAttrs!=null ) { |
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for (String requiredAttr : requiredAttrs) { |
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if( !containsIgnoreCase(list2, requiredAttr) ) {
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list2.add(requiredAttr); |
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} |
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} |
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} |
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} |
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this.attrsForQuery = (String[]) list2.toArray(new String[]{}); |
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// if( this.store2NamesMap.containsKey(keyAttr2) ) {
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// this.attrsForQuery = this.attrs;
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// } else {
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// List<String> list = new ArrayList<String>(this.attrs.length + 1);
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// list.addAll(Arrays.asList(this.attrs));
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// list.add(keyAttr2);
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// this.attrsForQuery = (String[]) list.toArray(new String[]{});
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// }
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// assign calculated feature type as this transform's feature type
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FeatureType[] types = new FeatureType[]{ |
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editableFeatureType.getNotEditableCopy()}; |
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setFeatureTypes(Arrays.asList(types), types[0]); |
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if( store2.getIndexes().getFeatureIndex(keyAttr2)==null ) { |
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store2.createIndex(featureType2, keyAttr2, keyAttr2, (Observer)null); |
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} |
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} |
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private void addFeatureType(EditableFeatureType targetFeatureType, FeatureAttributeDescriptor[] featureAttributeDescriptors, |
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String prefix, Map<String, String> storeMap) throws DataException { |
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for( int i = 0; i < featureAttributeDescriptors.length; i++ ) { |
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addFeatureType(targetFeatureType, featureAttributeDescriptors[i], prefix, storeMap); |
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} |
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} |
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private void addFeatureType(EditableFeatureType targetFeatureType, FeatureAttributeDescriptor featureAttributeDescriptor, |
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String prefix, Map<String, String> storeMap) throws DataException { |
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String attName = featureAttributeDescriptor.getName();
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if( (prefix != null) && (!prefix.equals("")) ) { |
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attName = prefix + "_" + attName;
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} |
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// If an attribute already exists, calculate an alternate name and add it to our type
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int j = 0; |
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while( targetFeatureType.getIndex(attName) >= 0 ) { |
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attName = targetFeatureType.getAttributeDescriptor(attName).getName() + "_" + ++j;
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} |
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EditableFeatureAttributeDescriptor editableFeatureAttributeDescriptor |
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= targetFeatureType.add(attName, featureAttributeDescriptor.getType(), |
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featureAttributeDescriptor.getSize()); |
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editableFeatureAttributeDescriptor.setPrecision(featureAttributeDescriptor.getPrecision()); |
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if( featureAttributeDescriptor.getType() == DataTypes.GEOMETRY ) {
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editableFeatureAttributeDescriptor.setGeometryType(featureAttributeDescriptor.getGeomType()); |
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} |
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// keep correspondence between original name and transformed name
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storeMap.put(featureAttributeDescriptor.getName(), attName); |
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} |
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/**
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*
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*
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* @param source
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*
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* @param target
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*
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* @throws DataException
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*/
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@Override
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public void applyTransform(Feature source, EditableFeature target) |
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throws DataException {
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// copy the data from store1 into the resulting feature
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this.copySourceToTarget(source, target);
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// ask store2 for the specified attributes, filtering by the key
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// attribute value
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// from the source feature
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JoinTransformEvaluator eval = this.getEvaluator();
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eval.updateValue(source.get(this.keyAttr1), this.attr1Context); |
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FeatureQuery query = store2.createFeatureQuery(); |
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query.setAttributeNames(attrsForQuery); |
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query.setFilter(eval); |
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FeatureSet set = null;
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DisposableIterator itFeat = null;
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try {
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set = store2.getFeatureSet(query); |
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// In this join implementation, we will take only the first matching
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// feature found in store2
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Feature feat; |
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itFeat = set.fastIterator(); |
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if( itFeat.hasNext() ) {
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feat = (Feature) itFeat.next(); |
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// copy all attributes from joined feature to target
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this.copyJoinToTarget(feat, target);
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} |
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} finally {
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if( itFeat != null ) { |
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itFeat.dispose(); |
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} |
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if( set != null ) { |
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set.dispose(); |
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} |
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} |
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} |
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/**
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* @param feat
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* @param target
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*/
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private void copyJoinToTarget(Feature join, EditableFeature target) { |
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Iterator<Entry<String, String>> iter = store2NamesMap.entrySet() |
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.iterator(); |
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Entry<String, String> entry; |
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FeatureType trgType = target.getType(); |
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FeatureAttributeDescriptor attr; |
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while( iter.hasNext() ) {
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entry = iter.next(); |
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attr = trgType.getAttributeDescriptor((String) entry.getValue());
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if( attr != null && !attr.isReadOnly() ) { |
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target.set(attr.getIndex(), join.get((String) entry.getKey()));
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} |
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} |
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} |
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/**
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* @param source
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* @param target
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*/
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private void copySourceToTarget(Feature source, EditableFeature target) { |
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FeatureAttributeDescriptor attr, attrTrg; |
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FeatureType ftSrc = source.getType(); |
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FeatureType ftTrg = target.getType(); |
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for( int i = 0; i < source.getType().size(); i++ ) { |
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attr = ftSrc.getAttributeDescriptor(i); |
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attrTrg = ftTrg.getAttributeDescriptor(store1NamesMap.get(attr.getName())); |
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if( attrTrg != null ) { |
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try {
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if( !attrTrg.isReadOnly() ) {
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target.set(attrTrg.getIndex(), source.get(i)); |
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} |
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} catch (SetReadOnlyAttributeException e1) {
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// Ignore, do nothing
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|
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} catch (IllegalArgumentException e) { |
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attrTrg = ftTrg.getAttributeDescriptor(attr.getName()); |
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target.set(attrTrg.getIndex(), attrTrg.getDefaultValue()); |
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} |
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} |
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} |
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} |
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private JoinTransformEvaluator getEvaluator() {
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if( this.evaluator == null ) { |
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FeatureType ft2 = null;
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try {
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ft2 = this.store2.getDefaultFeatureType();
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} catch (DataException e) {
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logger.warn("Can't access to the feature type to build the evaluator.", e);
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throw new RuntimeException("Can't access to the feature type to build the evaluator.", e); |
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} |
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FeatureAttributeDescriptor att2 = ft2.getAttributeDescriptor(keyAttr2); |
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boolean is_num = att2.getDataType().isNumeric();
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this.evaluator = new JoinTransformEvaluator(keyAttr2, is_num); |
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} |
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return evaluator;
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|
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} |
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|
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private class JoinTransformEvaluator |
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implements Evaluator {
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|
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private String attribute; |
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private boolean isNumeric = false; |
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private Object value; |
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private String sql; |
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private EvaluatorFieldsInfo info = null; |
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private Coercion coercion;
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private CoercionContext context;
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|
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// private int attributeIndex;
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public JoinTransformEvaluator(String attribute, boolean is_numeric) { |
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this.attribute = attribute;
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this.isNumeric = is_numeric;
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this.value = null; |
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this.info = new EvaluatorFieldsInfo(); |
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|
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// this.attributeIndex = attrIndex;
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} |
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|
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public void updateValue(Object value, CoercionContext context) { |
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this.value = value;
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this.coercion = null; |
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this.context = context;
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|
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if (this.value!=null) { |
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DataType dataType = ToolsLocator.getDataTypesManager().getDataType(value.getClass()); |
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if (dataType!=null) { |
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this.coercion = dataType.getCoercion();
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} |
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String qt = this.isNumeric ? "" : "'"; |
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this.sql = this.attribute + " = " + qt + this.value + qt; |
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} else {
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this.sql = this.attribute + " = null"; |
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} |
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this.info = new EvaluatorFieldsInfo(); |
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this.info.addMatchFieldValue(this.attribute, value); |
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} |
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|
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@Override
|
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public Object evaluate(EvaluatorData arg0) throws EvaluatorException { |
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Object curValue = arg0.getDataValue(attribute);
|
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if( curValue == null ) { |
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return value == null; |
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} |
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if ( value == null) { |
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return false; |
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} |
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Object coerceValue;
|
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if (this.coercion == null) { |
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return StringUtils.equals(Objects.toString(curValue), Objects.toString(value));
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} |
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try {
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coerceValue = this.coercion.coerce(curValue, this.context); |
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return coerceValue.equals(value);
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} catch (CoercionException ex) {
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return StringUtils.equals(Objects.toString(curValue), Objects.toString(value));
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} |
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} |
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|
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@Override
|
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public String getSQL() { |
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return this.sql; |
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} |
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|
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@Override
|
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public String getDescription() { |
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return "Evaluates join transform match"; |
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} |
488 |
|
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@Override
|
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public String getName() { |
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return "JoinTransformEvaluator"; |
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} |
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|
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@Override
|
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public EvaluatorFieldsInfo getFieldsInfo() {
|
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return this.info; |
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} |
498 |
|
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} |
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|
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@SuppressWarnings("unchecked") |
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@Override
|
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public FeatureType getSourceFeatureTypeFrom(FeatureType arg0) {
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return originalFeatureType;
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} |
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|
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public static void registerPersistent() { |
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PersistenceManager persistenceManager = ToolsLocator.getPersistenceManager(); |
509 |
|
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if( persistenceManager.getDefinition(AbstractFeatureStoreTransform.class) == null ) { |
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AbstractFeatureStoreTransform.registerPersistent(); |
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} |
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|
514 |
DynStruct definition = persistenceManager.getDefinition(PERSISTENCE_DEFINITION_NAME); |
515 |
|
516 |
if( definition == null ) { |
517 |
definition = persistenceManager.addDefinition( |
518 |
JoinTransform.class, |
519 |
PERSISTENCE_DEFINITION_NAME, |
520 |
"JoinTransform Persistence definition",
|
521 |
null,
|
522 |
null
|
523 |
); |
524 |
definition.extend(PersistenceManager.PERSISTENCE_NAMESPACE, |
525 |
ABSTRACT_FEATURESTORE_DYNCLASS_NAME); |
526 |
|
527 |
definition.addDynFieldObject("store2").setClassOfValue(FeatureStore.class).setMandatory(true); |
528 |
definition.addDynFieldString("keyAttr1").setMandatory(true); |
529 |
definition.addDynFieldString("keyAttr2").setMandatory(true); |
530 |
definition.addDynFieldString("prefix1").setMandatory(false); |
531 |
definition.addDynFieldString("prefix2").setMandatory(false); |
532 |
definition.addDynFieldList("attrs").setClassOfItems(String.class).setMandatory(true); |
533 |
} |
534 |
} |
535 |
|
536 |
@Override
|
537 |
public void saveToState(PersistentState state) throws PersistenceException { |
538 |
super.saveToState(state);
|
539 |
state.set("store2", this.store2); |
540 |
state.set("keyAttr1", this.keyAttr1); |
541 |
state.set("keyAttr2", this.keyAttr2); |
542 |
state.set("prefix1", this.prefix1); |
543 |
state.set("prefix2", this.prefix2); |
544 |
state.set("attrs", this.attrs); |
545 |
} |
546 |
|
547 |
@Override
|
548 |
public void loadFromState(PersistentState state) throws PersistenceException { |
549 |
super.loadFromState(state);
|
550 |
store2 = (FeatureStore) state.get("store2");
|
551 |
keyAttr1 = state.getString("keyAttr1");
|
552 |
keyAttr2 = state.getString("keyAttr2");
|
553 |
prefix1 = state.getString("prefix1");
|
554 |
prefix2 = state.getString("prefix2");
|
555 |
attrs = (String[]) state.getArray("attrs", String.class); |
556 |
} |
557 |
|
558 |
} |