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 @ 44641
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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.fmap.dal.DALLocator; |
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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.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 queryParameters = new HashMap(); |
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private String featureTypeId = null; |
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private List attributeNames = new ArrayList(); |
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private List constantsAttributeNames = new ArrayList(); |
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private Evaluator filter;
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/**
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* This boolean value is used to know if the current filter
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* has been added using the {@link FeatureQuery#addFilter(Evaluator)}
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* method or the {@link FeatureQuery#setFilter(Evaluator)} method.
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*/
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// private boolean isAddFilter = true;
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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 boolean group = false; |
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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 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(DALLocator.getDataManager().createExpresion(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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try {
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this.addFilter(DALLocator.getDataManager().createFilter(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 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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|
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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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} |
428 |
|
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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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} |
433 |
|
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@Override
|
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public boolean hasFilter() { |
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return this.filter != null; |
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} |
438 |
|
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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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} |
455 |
|
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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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} |
460 |
|
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return clone;
|
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} |
463 |
|
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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(); |
471 |
return null; |
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} |
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// 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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} |
490 |
|
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@Override
|
492 |
public String getFeatureTypeId() { |
493 |
return featureTypeId;
|
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} |
495 |
|
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@Override
|
497 |
public void setFeatureTypeId(String featureTypeId) { |
498 |
this.featureTypeId = featureTypeId;
|
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} |
500 |
|
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@Override
|
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public void saveToState(PersistentState state) throws PersistenceException { |
503 |
// FIXME: falta por terminar de implementar
|
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state.set("queryParameters", this.queryParameters); |
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state.set("featureTypeId", this.featureTypeId); |
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state.set("attributeNames", this.attributeNames); |
507 |
// state.set("filter", this.filter);
|
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state.set("limit", this.limit); |
509 |
state.set("pageSize", this.pageSize); |
510 |
|
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} |
512 |
|
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@Override
|
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public void loadFromState(PersistentState state) throws PersistenceException { |
515 |
// 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"); |
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this.pageSize = state.getLong("pageSize"); |
522 |
|
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} |
524 |
|
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/**
|
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* Register the class on PersistenceManager
|
527 |
*
|
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*/
|
529 |
public static void registerPersistent() { |
530 |
DynStruct definition = |
531 |
ToolsLocator.getPersistenceManager() |
532 |
.addDefinition(DefaultFeatureQuery.class, |
533 |
"DefaultFeatureQuery",
|
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"DefaultFeatureQuery Persistent definition",
|
535 |
null,
|
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null);
|
537 |
|
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definition.addDynFieldMap("queryParameters")
|
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.setClassOfItems(Object.class)
|
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.setMandatory(true);
|
541 |
|
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definition.addDynFieldString("featureTypeId").setMandatory(false); |
543 |
|
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definition.addDynFieldList("attributeNames")
|
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.setClassOfItems(String.class)
|
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.setMandatory(false);
|
547 |
|
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definition.addDynFieldObject("filter")
|
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.setClassOfValue(Evaluator.class) |
550 |
.setMandatory(false);
|
551 |
|
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definition.addDynFieldObject("order")
|
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.setClassOfValue(FeatureQueryOrder.class) |
554 |
.setMandatory(false);
|
555 |
|
556 |
definition.addDynFieldLong("limit").setMandatory(false); |
557 |
|
558 |
definition.addDynFieldLong("pageSize").setMandatory(false); |
559 |
|
560 |
} |
561 |
|
562 |
@Override
|
563 |
public long getLimit() { |
564 |
return limit;
|
565 |
} |
566 |
|
567 |
@Override
|
568 |
public long getPageSize() { |
569 |
return pageSize;
|
570 |
} |
571 |
|
572 |
@Override
|
573 |
public void setLimit(long limit) { |
574 |
this.limit = limit;
|
575 |
} |
576 |
|
577 |
@Override
|
578 |
public void setPageSize(long pageSize) { |
579 |
this.pageSize = pageSize;
|
580 |
} |
581 |
|
582 |
@Override
|
583 |
public String[] getConstantsAttributeNames() { |
584 |
return (String[])constantsAttributeNames.toArray(new String[constantsAttributeNames.size()]); |
585 |
} |
586 |
|
587 |
@Override
|
588 |
public void setConstantsAttributeNames(String[] constantsAttributeNames) { |
589 |
this.constantsAttributeNames.clear();
|
590 |
if (constantsAttributeNames != null){ |
591 |
for (int i=0 ; i<constantsAttributeNames.length ; i++){ |
592 |
this.constantsAttributeNames.add(constantsAttributeNames[i]);
|
593 |
} |
594 |
} |
595 |
} |
596 |
|
597 |
@Override
|
598 |
public void addConstantAttributeName(String attributeName) { |
599 |
//If the attribute exists finish the method
|
600 |
for (int i=0 ; i<constantsAttributeNames.size() ; i++){ |
601 |
if (constantsAttributeNames.get(i).equals(attributeName)){
|
602 |
return;
|
603 |
} |
604 |
} |
605 |
this.constantsAttributeNames.add(attributeName);
|
606 |
} |
607 |
|
608 |
@Override
|
609 |
public boolean hasConstantsAttributeNames() { |
610 |
return !this.constantsAttributeNames.isEmpty(); |
611 |
} |
612 |
|
613 |
@Override
|
614 |
public void clearConstantsAttributeNames() { |
615 |
this.constantsAttributeNames = new ArrayList(); |
616 |
} |
617 |
|
618 |
@Override
|
619 |
public boolean isGrouped() { |
620 |
return this.group; |
621 |
} |
622 |
|
623 |
@Override
|
624 |
public void setGroup(boolean group) { |
625 |
this.group = group;
|
626 |
} |
627 |
|
628 |
} |