svn-gvsig-desktop / trunk / extensions / extSymbology / src / org / gvsig / symbology / fmap / rendering / VectorFilterExpressionLegend.java @ 23265
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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.io.StringReader; |
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import java.util.ArrayList; |
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import java.util.Hashtable; |
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import org.apache.log4j.Logger; |
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import org.gvsig.symbology.fmap.labeling.parse.LabelExpressionParser; |
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import org.gvsig.symbology.fmap.rendering.filter.operations.Expression; |
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import org.gvsig.symbology.fmap.rendering.filter.operations.ExpressionException; |
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import org.gvsig.symbology.fmap.rendering.filter.parser.ParseException; |
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import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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import com.hardcode.gdbms.engine.data.DataSource; |
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import com.hardcode.gdbms.engine.instruction.FieldNotFoundException; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.iver.cit.gvsig.fmap.Messages; |
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import com.iver.cit.gvsig.fmap.core.IFeature; |
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import com.iver.cit.gvsig.fmap.core.SymbologyFactory; |
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import com.iver.cit.gvsig.fmap.core.symbols.ISymbol; |
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import com.iver.cit.gvsig.fmap.drivers.legend.LegendDriverException; |
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import com.iver.cit.gvsig.fmap.layers.XMLException; |
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import com.iver.cit.gvsig.fmap.rendering.AbstractClassifiedVectorLegend; |
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import com.iver.cit.gvsig.fmap.rendering.ILegend; |
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import com.iver.cit.gvsig.fmap.rendering.LegendFactory; |
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import com.iver.cit.gvsig.fmap.rendering.SymbolLegendEvent; |
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import com.iver.utiles.XMLEntity; |
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/**
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*
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* Implements a vectorial 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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* @author Pepe Vidal Salvador - jose.vidal.salvador@iver.es
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*/
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public class VectorFilterExpressionLegend extends AbstractClassifiedVectorLegend { |
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private int shapeType; |
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private ISymbol defaultSymbol;
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private String labelFieldName; |
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private String labelFieldHeight; |
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private String labelFieldRotation; |
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private boolean useDefaultSymbol = false; |
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private String[] fNames; |
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private Hashtable<String, Value> parser_symbol_table = new Hashtable<String, Value>(); |
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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 { |
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private ISymbol sym;
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private String expression; |
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private Expression expParser; |
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public Item(String expression, ISymbol sym) { |
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this.expression = expression;
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this.sym = sym;
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try {
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this.expParser = createExpressionParser(this.expression); |
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} catch (ParseException e) { |
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e.printStackTrace(); |
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Logger.getLogger(getClass()).error(Messages.getString("invalid_filter_expression")); |
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} |
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} |
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private Expression createExpressionParser(String expressionString) throws ParseException { |
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LabelExpressionParser parser = new LabelExpressionParser(new StringReader(expressionString), parser_symbol_table); |
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try {
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parser.LabelExpression(); |
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} catch (org.gvsig.symbology.fmap.labeling.parse.ParseException e) {
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e.printStackTrace(); |
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} |
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Expression expression = (Expression) parser.getStack().pop(); |
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return expression;
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} |
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@Override
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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.expression.equals(((Item) obj).expression); |
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} |
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public ISymbol getSym() {
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return sym;
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} |
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public String getStringExpression() { |
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return expression;
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} |
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public Expression getExpressionForParser() { |
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return expParser;
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} |
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} |
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/**
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* Constructor method
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*
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* @param type shapetype of the layer
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* @param fieldNames classifying field names used in the legend
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*/
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public VectorFilterExpressionLegend(int type,String[] fieldNames) { |
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setShapeType(type); |
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this.setClassifyingFieldNames(fieldNames);
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this.fNames = fieldNames;
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} |
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/**
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* Constructor method
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*
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*/
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public VectorFilterExpressionLegend() { }
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public ISymbol getSymbolByFeature(IFeature feat) {
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ISymbol returnSymbol = null;
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Object result = null; |
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fNames = getClassifyingFieldNames(); |
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try {
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updateSymbolsTable(feat, fNames); |
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for (int i = 0; i < newSymbols.size(); i++) { |
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Expression expression = newSymbols.get(i).expParser;
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result = expression.evaluate(); |
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if(result != null && (Boolean)result==true) { |
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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 (ExpressionException e) {
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e.printStackTrace(); |
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} catch (LegendDriverException e) {
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Logger.getLogger(getClass()).error(Messages.getString("invalid_url")); |
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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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* Returns a HashTable containing the name of the field of an specific feature
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* and its values
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*
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* @param feat specific feature
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* @param fNames field names
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* @return HashTable
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* @throws LegendDriverException
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*/
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private void updateSymbolsTable(IFeature feat, String[] fNames) throws LegendDriverException { |
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for (int j = 0; j < fNames.length; j++) { |
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if(feat.getAttribute(j) != null) |
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parser_symbol_table.put(fNames[j], feat.getAttribute(j)); |
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else throw new LegendDriverException(LegendDriverException.CLASSIFICATION_FIELDS_NOT_FOUND); |
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} |
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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 delSymbol(Object key) { |
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newSymbols.remove(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).equals(key))
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mySymbol = newSymbols.get(i).sym; |
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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 ILegend cloneLegend() throws XMLException { |
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return LegendFactory.createFromXML(getXMLEntity());
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} |
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public ISymbol getDefaultSymbol() {
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if(defaultSymbol==null) { |
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defaultSymbol = SymbologyFactory.createDefaultSymbolByShapeType(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 XMLEntity getXMLEntity() {
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XMLEntity xml = new XMLEntity();
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xml.putProperty("className", this.getClass().getName()); |
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xml.putProperty("fieldNames", getClassifyingFieldNames());
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xml.putProperty("fieldTypes", getClassifyingFieldTypes());
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xml.putProperty("labelfield", labelFieldName);
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xml.putProperty("labelFieldHeight", labelFieldHeight);
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xml.putProperty("labelFieldRotation", labelFieldRotation);
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if (getDefaultSymbol() == null) { |
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xml.putProperty("useDefaultSymbol", 0); |
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} else {
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xml.putProperty("useDefaultSymbol", 1); |
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xml.addChild(getDefaultSymbol().getXMLEntity()); |
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} |
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xml.putProperty("numKeys", newSymbols.size());
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if (newSymbols.size() > 0) { |
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xml.putProperty("tipoValueKeys", "Expressions"); |
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String[] sk = new String[newSymbols.size()]; |
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for (int i = 0; i < newSymbols.size(); i++) { |
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sk[i] = newSymbols.get(i).expression.toString(); |
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} |
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xml.putProperty("keys", getValues());
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for (int i = 0; i < newSymbols.size(); i++) { |
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xml.addChild(getSymbols()[i].getXMLEntity()); |
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} |
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} |
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if (getZSort()!=null) { |
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XMLEntity xmlZSort = getZSort().getXMLEntity(); |
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xmlZSort.putProperty("id", "zSort"); |
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xml.addChild(xmlZSort); |
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} |
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return xml;
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} |
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public void setXMLEntity(XMLEntity xml) { |
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clear(); |
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if (xml.contains("fieldName")) |
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setClassifyingFieldNames(new String[] {xml.getStringProperty("fieldName")}); |
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else {
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setClassifyingFieldNames(xml.getStringArrayProperty("fieldNames"));
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} |
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if (xml.contains("fieldTypes")) |
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setClassifyingFieldTypes(new int[] {xml.getIntProperty("fieldTypes")}); |
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useDefaultSymbol = xml.getBooleanProperty("useDefaultSymbol");
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int hasDefaultSymbol = xml.getIntProperty("useDefaultSymbol"); |
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if (hasDefaultSymbol == 1) { |
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setDefaultSymbol(SymbologyFactory.createSymbolFromXML(xml.getChild(0), null)); |
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} else {
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setDefaultSymbol(null);
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} |
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int numKeys = xml.getIntProperty("numKeys"); |
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if (numKeys > 0) { |
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String[] sk = xml.getStringArrayProperty("keys"); |
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String auxExpression;
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for (int i = 0; i < numKeys; i++) { |
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auxExpression = sk[i]; |
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newSymbols.add(new Item(auxExpression,SymbologyFactory.createSymbolFromXML(xml.getChild(i + hasDefaultSymbol), null))); |
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System.out.println("auxExpression =" + auxExpression + "Symbol =" + |
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SymbologyFactory.createSymbolFromXML(xml.getChild(i + hasDefaultSymbol), null)
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.getDescription()+"\n");
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} |
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} |
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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 ISymbol getSymbol(int i) throws ReadDriverException { |
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return null; |
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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 setDataSource(DataSource ds) throws FieldNotFoundException, |
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ReadDriverException { |
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// dataSource = ds;
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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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setDefaultSymbol(SymbologyFactory. |
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createDefaultSymbolByShapeType(shapeType)); |
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this.shapeType = shapeType;
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} |
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} |
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public void setXMLEntity03(XMLEntity xml) { |
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// TODO Auto-generated method stub
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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).expression; |
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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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} |