root / org.gvsig.legend.vectorfilterexpression.app.mainplugin / trunk / org.gvsig.legend.vectorfilterexpression.app.mainplugin / src / main / java / org / gvsig / symbology / fmap / rendering / VectorFilterExpressionLegend.java @ 1856
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/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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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 2
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib��ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package org.gvsig.symbology.fmap.rendering; |
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import java.util.ArrayList; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.GeometryLocator; |
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import org.gvsig.fmap.geom.GeometryManager; |
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import org.gvsig.fmap.mapcontext.MapContextLocator; |
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import org.gvsig.fmap.mapcontext.MapContextManager; |
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import org.gvsig.fmap.mapcontext.rendering.legend.events.SymbolLegendEvent; |
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import org.gvsig.fmap.mapcontext.rendering.symbols.ISymbol; |
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import org.gvsig.i18n.Messages; |
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import org.gvsig.symbology.fmap.mapcontext.rendering.legend.impl.AbstractClassifiedVectorLegend; |
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import org.gvsig.symbology.fmap.rendering.filterexpression.EvaluatorCreator; |
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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.Evaluator; |
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import org.gvsig.tools.evaluator.EvaluatorData; |
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import org.gvsig.tools.evaluator.EvaluatorWithDescriptions; |
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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.gvsig.tools.util.Callable; |
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/**
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*
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* Implements a vector legend which represents the elements of a layer
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* depending on the value of an expression. That is, if the expression is
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* evaluated to true, then the symbol associated to the expression is painted.
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* In other case it is not showed.
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*
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* If the expression result is a string, it is considered false if
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* it is the empty string "", true otherwise.
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*
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* If the expression result is numeric, it is considered false
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* if it is zero, and true otherwise.
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*
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* In other cases, it is considered false if the result is null and true
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* otherwise.
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*
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* @author Pepe Vidal Salvador - jose.vidal.salvador@iver.es
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* @author jldominguez
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*/
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public class VectorFilterExpressionLegend |
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extends AbstractClassifiedVectorLegend {
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private static final Logger logger = LoggerFactory.getLogger( |
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VectorFilterExpressionLegend.class); |
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public static final String |
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FILTER_EXPRESSION_LEGEND_PERSISTENCE_DEFINITION_NAME = |
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"FILTER_EXPRESSION_LEGEND_PERSISTENCE_DEFINITION_NAME";
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public static final String |
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FILTER_EXPRESSION_LEGEND_NAME = "FILTER_EXPRESSION_LEGEND_NAME";
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public static final String I18N_DEFAULT = Messages.getText("default_value"); |
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public static final String NON_I18N_DEFAULT = Messages.getText("Default"); |
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private int shapeType; |
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private ISymbol defaultSymbol;
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private boolean useDefaultSymbol = false; |
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private long error_msg_count = 0; |
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private ArrayList<Item> newSymbols = new ArrayList<Item>() { |
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private static final long serialVersionUID = 1L; |
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public int indexOf(String expr) { |
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return super.indexOf(new Item(expr, null)); |
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} |
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}; |
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private class Item implements Cloneable { |
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private ISymbol sym;
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// get it with getSql()
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// private String expression;
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private EvaluatorWithDescriptions evaluator;
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public Item(String expression, ISymbol sym) { |
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this.sym = sym;
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evaluator = EvaluatorCreator.getEvaluator(expression); |
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} |
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public boolean equals(Object obj) { |
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if (obj == null) return false; |
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if (!obj.getClass().equals(Item.class)) return false; |
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return this.evaluator.getSQL().equals( |
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((Item) obj).evaluator.getSQL() |
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); |
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} |
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public String getStringExpression() { |
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return evaluator.getSQL();
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} |
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public Evaluator getEvaluator() {
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return evaluator;
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} |
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public Object clone() { |
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ISymbol clonesym = null;
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try {
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clonesym = (ISymbol) this.sym.clone();
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} catch (CloneNotSupportedException e) { |
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logger.info("Error: unable to clone symbol.", e);
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clonesym = this.sym;
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} |
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return new Item(getStringExpression(), clonesym); |
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} |
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} |
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public VectorFilterExpressionLegend() {
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this.setClassifyingFieldNames(new String[0]); |
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this.setClassifyingFieldTypes(new int[0]); |
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} |
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public ISymbol getSymbolByFeature(Feature featu) {
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EvaluatorData evda = featu.getEvaluatorData(); |
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ISymbol returnSymbol = null;
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Object result = null; |
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String expr = null; |
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try {
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for (int i = 0; i < newSymbols.size(); i++) { |
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Evaluator eval = newSymbols.get(i).getEvaluator(); |
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expr = eval.getSQL(); |
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if (expr.equalsIgnoreCase(VectorFilterExpressionLegend.I18N_DEFAULT)){
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/*
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* Skip default item
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*/
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continue;
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} |
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result = eval.evaluate(evda); |
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if (isConsideredTrue(result)) {
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returnSymbol = newSymbols.get(i).sym; |
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if (returnSymbol != null) { |
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return returnSymbol;
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} |
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} |
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} |
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} catch (Exception e) { |
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if (error_msg_count % 1000 == 0) { |
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logger.info("Error (msg every 1000 occurrences) while getting symbol in VectorFilterExpressionLegend", e);
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error_msg_count = 0;
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} |
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error_msg_count++; |
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} |
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if (useDefaultSymbol)
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return getDefaultSymbol();
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return null; |
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} |
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/**
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* Tells whether the input object is considered true.
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* Basically, it is false if it has an empty value
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* (FALSE, null, 0, "")
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*
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* @param result
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* @return
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*/
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private boolean isConsideredTrue(Object res) { |
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if (res == null) { |
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return false; |
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} |
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if (res instanceof Boolean) { |
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return ((Boolean) res).booleanValue(); |
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} |
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if (res instanceof Number) { |
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return ((Number) res).doubleValue() != 0d; |
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} |
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if (res instanceof String) { |
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return ((String) res).length() > 0; |
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} |
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// Because it is not null
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return true; |
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} |
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public void addSymbol(Object key, ISymbol symbol) { |
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newSymbols.add(new Item((String)key.toString(), |
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symbol)); |
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} |
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public void clear() { |
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newSymbols.clear(); |
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} |
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public void resetItems() { |
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newSymbols = new ArrayList<Item>() { |
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private static final long serialVersionUID = 1L; |
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public int indexOf(String expr) { |
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return super.indexOf(new Item(expr, null)); |
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} |
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}; |
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} |
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public void delSymbol(Object key) { |
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ISymbol mySymbol = null;
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for (int i = 0; i < newSymbols.size(); i++) { |
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if (newSymbols.get(i).evaluator.getSQL().equals(key))
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newSymbols.remove(i); |
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} |
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fireClassifiedSymbolChangeEvent(new SymbolLegendEvent(mySymbol,null)); |
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} |
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public void replace(ISymbol oldSymbol, ISymbol newSymbol) { |
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for (int i = 0; i < newSymbols.size(); i++) { |
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if (newSymbols.get(i).sym.equals(oldSymbol))
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newSymbols.get(i).sym = newSymbol; |
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} |
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fireClassifiedSymbolChangeEvent(new SymbolLegendEvent(oldSymbol,newSymbol));
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} |
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public String[] getDescriptions() { |
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String[] descriptions = new String[newSymbols.size()]; |
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ISymbol[] auxSym = getSymbols();
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for (int i = 0; i < descriptions.length; i++) |
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descriptions[i] = auxSym[i].getDescription(); |
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return descriptions;
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} |
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public ISymbol[] getSymbols() { |
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if (newSymbols != null) { |
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ISymbol[] mySymbols = new ISymbol[newSymbols.size()]; |
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for (int i = 0; i < newSymbols.size(); i++) { |
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mySymbols[i] = newSymbols.get(i).sym; |
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} |
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return mySymbols;
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} |
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return null; |
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} |
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public ISymbol getDefaultSymbol() {
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if(defaultSymbol==null) { |
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defaultSymbol = MapContextLocator.getSymbolManager( |
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).createSymbol(shapeType); |
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fireDefaultSymbolChangedEvent(new SymbolLegendEvent(null, defaultSymbol)); |
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} |
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return defaultSymbol;
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} |
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public String getClassName() { |
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return getClass().getName();
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} |
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public int getShapeType() { |
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return shapeType;
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} |
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public boolean isUseDefaultSymbol() { |
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return useDefaultSymbol;
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} |
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public void setDefaultSymbol(ISymbol s) throws IllegalArgumentException { |
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if (s == null) throw new NullPointerException("Default symbol cannot be null"); |
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ISymbol old = defaultSymbol; |
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defaultSymbol = s; |
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fireDefaultSymbolChangedEvent(new SymbolLegendEvent(old, defaultSymbol));
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} |
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public void setShapeType(int shapeType) { |
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if (this.shapeType != shapeType) { |
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ISymbol sym = MapContextLocator.getSymbolManager( |
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).createSymbol(shapeType); |
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setDefaultSymbol(sym); |
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this.shapeType = shapeType;
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} |
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} |
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public void useDefaultSymbol(boolean b) { |
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useDefaultSymbol = b; |
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} |
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public Object[] getValues() { |
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if (newSymbols != null) { |
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Object[] myObjects = new Object[newSymbols.size()]; |
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for (int i = 0; i < newSymbols.size(); i++) { |
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myObjects[i] = newSymbols.get(i).getStringExpression(); |
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} |
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return myObjects;
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} |
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return null; |
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} |
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public static boolean isPolygonal(int ty) { |
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GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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return geomManager.isSubtype(Geometry.TYPES.MULTISURFACE, ty) ||
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geomManager.isSubtype(Geometry.TYPES.SURFACE, ty); |
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} |
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public static boolean isLinear(int ty) { |
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GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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return geomManager.isSubtype(Geometry.TYPES.MULTICURVE, ty) ||
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geomManager.isSubtype(Geometry.TYPES.CURVE, ty); |
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} |
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public static boolean isPoint(int ty) { |
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GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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return geomManager.isSubtype(Geometry.TYPES.MULTIPOINT, ty) ||
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geomManager.isSubtype(Geometry.TYPES.POINT, ty); |
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} |
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public void removeDefaultSymbol() { |
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} |
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// =============================
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public static class RegisterPersistence implements Callable { |
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public Object call() throws Exception { |
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PersistenceManager manager = ToolsLocator.getPersistenceManager(); |
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if (manager.getDefinition(
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FILTER_EXPRESSION_LEGEND_PERSISTENCE_DEFINITION_NAME) == null) {
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DynStruct definition = manager |
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.addDefinition(VectorFilterExpressionLegend.class, |
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FILTER_EXPRESSION_LEGEND_PERSISTENCE_DEFINITION_NAME, |
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FILTER_EXPRESSION_LEGEND_PERSISTENCE_DEFINITION_NAME |
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+ " Persistence definition", null, null); |
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definition.extend(manager.getDefinition( |
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AbstractClassifiedVectorLegend |
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.CLASSIFIED_VECTOR_LEGEND_PERSISTENCE_DEFINITION_NAME)); |
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definition.addDynFieldBoolean("useDefaultSymbol")
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.setMandatory(true);
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definition.addDynFieldObject("defaultSymbol")
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.setClassOfValue(ISymbol.class).setMandatory(true);
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definition.addDynFieldInt("shapeType")
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.setMandatory(true);
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definition.addDynFieldArray("itemSymbolArray")
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.setClassOfItems(ISymbol.class); |
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definition.addDynFieldArray("itemStringArray")
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.setClassOfItems(String.class);
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} |
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return Boolean.TRUE; |
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} |
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} |
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public static class RegisterLegend implements Callable { |
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public Object call() throws Exception { |
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MapContextManager manager = |
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MapContextLocator.getMapContextManager(); |
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manager.registerLegend( |
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FILTER_EXPRESSION_LEGEND_NAME, |
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VectorFilterExpressionLegend.class); |
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return Boolean.TRUE; |
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} |
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} |
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public void saveToState(PersistentState state) throws PersistenceException { |
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super.saveToState(state);
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state.set("useDefaultSymbol", this.isUseDefaultSymbol()); |
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state.set("defaultSymbol", this.getDefaultSymbol()); |
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state.set("shapeType", this.getShapeType()); |
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ISymbol[] syms = this.getSymbols(); |
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if (syms == null) { |
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syms = new ISymbol[0]; |
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} |
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Object[] vals = this.getValues(); |
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String[] vals_str = null; |
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if (vals == null) { |
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vals_str = new String[0]; |
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} else {
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vals_str = new String[vals.length]; |
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for (int i=0; i<vals.length; i++) { |
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String aux = ((vals[i] == null) ? null : vals[i].toString()); |
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// Prevents saving localized version of 'Default'
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aux = translateDefault(aux, false);
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vals_str[i] = aux; |
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} |
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} |
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state.set("itemSymbolArray", syms);
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state.set("itemStringArray", vals_str);
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} |
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public void loadFromState(PersistentState state) |
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throws PersistenceException {
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super.loadFromState(state);
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this.setShapeType(state.getInt("shapeType")); |
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Boolean b = state.getBoolean("useDefaultSymbol"); |
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this.useDefaultSymbol(b);
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ISymbol defsym = (ISymbol) state.get("defaultSymbol");
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this.setDefaultSymbol(defsym);
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String[] strs = state.getStringArray("itemStringArray"); |
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ISymbol[] syms = (ISymbol[]) state.getArray("itemSymbolArray", |
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ISymbol.class); |
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if (strs.length != syms.length) {
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logger.info("VectorFilterExpressionLegend - load state - Different size in arrays: " + strs.length + ", " + syms.length); |
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} |
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int nmin = Math.min(strs.length, syms.length); |
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for (int i=0; i<nmin; i++) { |
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String aux = strs[i];
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aux = translateDefault(aux, true);
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this.addSymbol(aux, syms[i]);
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} |
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} |
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|
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/**
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* Utility method to (un)translate the word 'Default'
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* @param aux
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* @param forward
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* If TRUE, then translate (Default -> Por defecto)
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* If FALSE then untranslate (Por defecto -> Default)
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* @return
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*/
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private String translateDefault(String aux, boolean forward) { |
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if (aux == null) { |
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return null; |
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} |
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if (forward && aux.compareTo(NON_I18N_DEFAULT) == 0) { |
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return I18N_DEFAULT;
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} |
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if (!forward && aux.compareTo(I18N_DEFAULT) == 0) { |
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return NON_I18N_DEFAULT;
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} |
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return aux;
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} |
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|
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|
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public Object clone() throws CloneNotSupportedException { |
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|
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VectorFilterExpressionLegend resp = |
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(VectorFilterExpressionLegend) super.clone();
|
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|
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Object[] vals = this.getValues(); |
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ISymbol[] syms = this.getSymbols(); |
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if (vals != null && syms != null) { |
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|
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resp.resetItems(); |
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|
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int n = Math.min(vals.length, syms.length); |
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for (int i=0; i<n; i++) { |
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resp.addSymbol( |
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vals[i], |
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(ISymbol) syms[i].clone()); |
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} |
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} |
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ISymbol sym = this.getDefaultSymbol();
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sym = (ISymbol) sym.clone(); |
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resp.setDefaultSymbol(sym); |
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return resp;
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} |
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|
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|
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|
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} |