gvsig-sldtools / org.gvsig.sld / org.gvsig.sldconverter / org.gvsig.sldconverter.lib / org.gvsig.sldconverter.lib.impl / src / main / java / org / gvsig / sldconverter / impl / legend / IntervalsLegendUtils.java @ 46
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/*******************************************************************************
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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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*******************************************************************************/
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package org.gvsig.sldconverter.impl.legend; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import org.gvsig.fmap.mapcontext.rendering.legend.IInterval; |
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import org.gvsig.fmap.mapcontext.rendering.legend.IVectorialIntervalLegend; |
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import org.gvsig.fmap.mapcontext.rendering.symbols.ISymbol; |
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import org.gvsig.sldconverter.exception.UnsupportedSymbolException; |
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import org.gvsig.sldconverter.impl.util.BasicUtils; |
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import org.gvsig.sldsupport.exception.UnsupportedSLDObjectException; |
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import org.gvsig.sldsupport.sld.filter.FilterTags; |
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import org.gvsig.sldsupport.sld.filter.SLDFilter; |
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import org.gvsig.sldsupport.sld.filter.SLDFilterOperator; |
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import org.gvsig.sldsupport.sld.filter.expression.SLDExpression; |
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import org.gvsig.sldsupport.sld.filter.expression.operator.SLDLiteral; |
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import org.gvsig.sldsupport.sld.filter.expression.operator.SLDPropertyName; |
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import org.gvsig.sldsupport.sld.filter.operator.SLDComparisonOperator; |
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import org.gvsig.sldsupport.sld.filter.operator.comparison.SLDBinaryComparisonOperator; |
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import org.gvsig.sldsupport.sld.filter.operator.comparison.SLDIsBetweenOperator; |
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import org.gvsig.sldsupport.sld.layer.SLDLayer; |
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import org.gvsig.sldsupport.sld.layer.SLDNamedLayer; |
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import org.gvsig.sldsupport.sld.rule.SLDRule; |
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import org.gvsig.sldsupport.sld.style.SLDFeatureStyle; |
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import org.gvsig.sldsupport.sld.style.layer.SLDUserStyle; |
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import org.gvsig.sldsupport.sld.symbol.SLDSymbol; |
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import org.gvsig.tools.dataTypes.CoercionException; |
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import org.gvsig.tools.dataTypes.DataType; |
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public class IntervalsLegendUtils { |
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public static IVectorialIntervalLegend toIntervalsLegend(List<SLDRule> rules) |
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throws UnsupportedSLDObjectException {
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IVectorialIntervalLegend intleg = (IVectorialIntervalLegend) |
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BasicUtils.mapMan().createLegend( |
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IVectorialIntervalLegend.LEGEND_NAME); |
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String pname = BasicUtils.getFirstPropertyName(rules);
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if (pname == null || pname.length() == 0) { |
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throw new UnsupportedSLDObjectException( |
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"SLDFeatureStyle", "Cannot interpret rules (no property name)"); |
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} |
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List<SLDLiteral> lits = BasicUtils.getComparisonLiterals(rules);
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if (lits == null || lits.size() == 0) { |
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throw new UnsupportedSLDObjectException( |
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"SLDFeatureStyle", "Cannot interpret rules (no literals)"); |
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} |
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DataType dt = BasicUtils.guessDataType(lits); |
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ISymbol sym = BasicUtils.getElseSymbol(rules); |
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// sym can be null
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Map<IInterval, ISymbol> map =
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IntervalsLegendUtils.getIntervalToSymbol(rules, dt, pname); |
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Iterator iter = map.keySet().iterator();
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Object k = null; |
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while (iter.hasNext()) {
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k = iter.next(); |
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intleg.addSymbol(k, map.get(k)); |
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} |
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// Setting Default symbol
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if (sym != null) { |
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sym.setDescription("Default");
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intleg.setDefaultSymbol(sym); |
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intleg.useDefaultSymbol(true);
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// String among the intervals
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intleg.addSymbol(sym.getDescription(), sym); |
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} else {
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intleg.useDefaultSymbol(false);
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} |
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String[] atts = new String[1]; |
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atts[0] = pname;
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intleg.setClassifyingFieldNames(atts); |
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int[] typs = new int[1]; |
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typs[0] = dt.getType();
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intleg.setClassifyingFieldTypes(typs); |
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return intleg;
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} |
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public static boolean areRulesOfIntervals(List<SLDRule> rules) { |
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if (rules == null || rules.size() == 0) { |
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return false; |
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} |
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SLDRule rule = null;
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String fieldName = null; |
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for (int i=0; i<rules.size(); i++) { |
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rule = rules.get(i); |
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fieldName = getComparisonToNumericLiteralFieldName(rule); |
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if (fieldName != null) { |
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break;
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} |
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} |
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if (fieldName == null) { |
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// The filter of first rule is not of type "field name equals literal"
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return false; |
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} |
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int elsecount = 0; |
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for (int i=1; i<rules.size(); i++) { |
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rule = rules.get(i); |
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if (!BasicUtils.isElse(rule)) {
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String fname = getComparisonToNumericLiteralFieldName(rule);
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if (fname == null || fname.compareTo(fieldName) != 0) { |
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// Not a equals operation based on the same field
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return false; |
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} |
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} else {
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elsecount++; |
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} |
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} |
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// Found no reason to deny it's a interval legend
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// (if number of else filters is 0 or 1)
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return elsecount < 2; |
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} |
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/**
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* Returns the name of the field name on which the rule
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* is based if the rule is a interval comparison and the
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* operand is a literal. Otherwise returns null.
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*
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* @param rule
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* @return
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*/
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private static String getComparisonToNumericLiteralFieldName(SLDRule rule) { |
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SLDFilter filt = rule.getFilter(); |
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if (filt == null) { |
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return null; |
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} |
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SLDFilterOperator oper = filt.getFilterOperator(); |
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if (!(oper instanceof SLDComparisonOperator)) { |
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// interval has to be SLDComparisonOperator
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return null; |
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} |
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SLDComparisonOperator cop = (SLDComparisonOperator) oper; |
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SLDPropertyName pname = null;
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if (cop instanceof SLDBinaryComparisonOperator) { |
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SLDBinaryComparisonOperator bco = (SLDBinaryComparisonOperator) cop; |
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String opname = bco.getComparisonOperator();
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if (opname.compareTo(FilterTags.PROPERTYISGREATEROREQUALTHAN) == 0 |
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|| opname.compareTo(FilterTags.PROPERTYISGREATERTHAN) == 0
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|| opname.compareTo(FilterTags.PROPERTYISLESSOREQUALTHAN) == 0
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|| opname.compareTo(FilterTags.PROPERTYISLESSTHAN) == 0) {
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if (bco.getFirstExpression() instanceof SLDLiteral && |
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bco.getSecondExpression() instanceof SLDPropertyName) {
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pname = (SLDPropertyName) bco.getSecondExpression(); |
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if (BasicUtils.isNumeric((SLDLiteral) bco.getFirstExpression())) {
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return pname.getPropertyName();
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} else {
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return null; |
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} |
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} |
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if (bco.getFirstExpression() instanceof SLDPropertyName && |
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bco.getSecondExpression() instanceof SLDLiteral) {
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pname = (SLDPropertyName) bco.getFirstExpression(); |
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if (BasicUtils.isNumeric((SLDLiteral) bco.getSecondExpression())) {
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return pname.getPropertyName();
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} else {
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return null; |
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} |
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} |
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} |
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} else {
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if (cop instanceof SLDIsBetweenOperator) { |
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SLDIsBetweenOperator beop = (SLDIsBetweenOperator) cop; |
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if (beop.getExpression() instanceof SLDPropertyName |
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// Limits must be literals
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&& beop.getLowerBoundary() instanceof SLDLiteral
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&& beop.getUpperBoundary() instanceof SLDLiteral) {
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pname = (SLDPropertyName) beop.getExpression(); |
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if (BasicUtils.isNumeric((SLDLiteral) beop.getLowerBoundary())
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&& BasicUtils.isNumeric((SLDLiteral) beop.getUpperBoundary())) {
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return pname.getPropertyName();
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} else {
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return null; |
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} |
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} |
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} |
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} |
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// Not the type we are looking for
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return null; |
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} |
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public static SLDLayer toSLDLayer(IVectorialIntervalLegend legend) |
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throws UnsupportedSymbolException {
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String fname = legend.getClassifyingFieldNames()[0]; |
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SLDSymbol sldsym = null;
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SLDRule rule = null;
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SLDFeatureStyle fstyle = new SLDFeatureStyle();
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IInterval iival = null;
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String valstr = null; |
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Object[] vals = legend.getValues(); |
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ISymbol[] syms = legend.getSymbols();
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int n = Math.min(vals.length, syms.length); |
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SLDFilter filt = null;
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SLDComparisonOperator oper = null;
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ISymbol elsesym = null;
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for (int i=0; i<n; i++) { |
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rule = new SLDRule();
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// =====================
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sldsym = BasicUtils.sldMan().toSLDSymbol(syms[i]); |
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rule.getSymbols().add(sldsym); |
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// =====================
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if (vals[i] instanceof IInterval) { |
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filt = BasicUtils.supMan().createFilter(); |
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filt.setIsElse(false);
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iival = (IInterval) vals[i]; |
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oper = intervalToComparisonOperator(iival, fname); |
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filt.setFilterOperator(oper); |
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// =====================
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rule.setFilter(filt); |
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// ======================
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fstyle.getRules().add(rule); |
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} else {
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// assuming "Default"
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elsesym = syms[i]; |
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} |
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} |
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// ================ Default symbol
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// No "Default" value was found in intervals
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// but default sym is enabled
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if (elsesym == null && legend.isUseDefaultSymbol()) { |
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elsesym = legend.getDefaultSymbol(); |
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} |
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if (elsesym != null) { |
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rule = new SLDRule();
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sldsym = BasicUtils.sldMan().toSLDSymbol(elsesym); |
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rule.getSymbols().add(sldsym); |
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filt = BasicUtils.supMan().createFilter(); |
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filt.setIsElse(true);
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rule.setFilter(filt); |
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fstyle.getRules().add(rule); |
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} |
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// ======================
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SLDUserStyle usty = new SLDUserStyle();
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usty.getFeatureStyles().add(fstyle); |
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SLDNamedLayer nlayer = new SLDNamedLayer();
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nlayer.setName("Name");
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nlayer.getStyles().add(usty); |
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return nlayer;
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} |
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private static SLDComparisonOperator intervalToComparisonOperator( |
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IInterval iival, String fieldName) {
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double max = iival.getMax();
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double min = iival.getMin();
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if (max == Double.MAX_VALUE && min != -Double.MAX_VALUE) { |
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// greater than min
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SLDBinaryComparisonOperator resp = new SLDBinaryComparisonOperator();
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resp.setComparisonOperator(FilterTags.PROPERTYISGREATEROREQUALTHAN); |
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resp.setFirstExpression(new SLDPropertyName(fieldName));
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resp.setSecondExpression(new SLDLiteral(BasicUtils.df.format(min)));
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return resp;
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} else {
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if (min == -Double.MAX_VALUE && max != Double.MAX_VALUE) { |
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// less than max
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SLDBinaryComparisonOperator resp = new SLDBinaryComparisonOperator();
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resp.setComparisonOperator(FilterTags.PROPERTYISLESSOREQUALTHAN); |
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resp.setFirstExpression(new SLDPropertyName(fieldName));
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resp.setSecondExpression(new SLDLiteral(BasicUtils.df.format(max)));
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return resp;
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} else {
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// normal (between)
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SLDIsBetweenOperator resp = new SLDIsBetweenOperator();
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resp.setExpression(new SLDPropertyName(fieldName));
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resp.setLowerBoundary(new SLDLiteral(BasicUtils.df.format(min)));
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resp.setUpperBoundary(new SLDLiteral(BasicUtils.df.format(max)));
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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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* Translates rules to a interval-symbol correspondence.
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*
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* @param rules
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* @param dt
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* @return
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* @throws UnsupportedSLDObjectException
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* @throws CoercionException
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*/
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public static Map<IInterval, ISymbol> getIntervalToSymbol( |
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List<SLDRule> rules, DataType dt, String pname) |
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throws UnsupportedSLDObjectException {
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Map<IInterval, ISymbol> resp = new HashMap<IInterval, ISymbol>(); |
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if (rules == null || rules.size() == 0) { |
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return resp;
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} |
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SLDFilter filt = null;
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List<SLDSymbol> symList = null; |
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SLDFilterOperator oper = null;
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SLDBinaryComparisonOperator binoper = null;
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ISymbol sym = null;
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SLDPropertyName sldpname = null;
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SLDLiteral sldlit = null;
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Object val = null; |
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for (int i=0; i<rules.size(); i++) { |
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symList = rules.get(i).getSymbols(); |
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if (symList == null || symList.size() == 0) { |
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/*
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* No symbols found
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*/
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continue;
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} |
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filt = rules.get(i).getFilter(); |
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if (filt == null) { |
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continue;
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} |
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if (!filt.isElse()) {
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oper = filt.getFilterOperator(); |
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if (oper instanceof SLDComparisonOperator) { |
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sym = BasicUtils.sldMan().toSymbol(symList.get(0));
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if (sym != null) { |
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IInterval ival = getIntervalForSymbol( |
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(SLDComparisonOperator) oper, pname, sym); |
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if (ival != null) { |
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resp.put(ival, sym); |
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} |
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} |
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} |
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} else {
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// filter is else
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} |
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} |
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return resp;
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} |
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private static IInterval getIntervalForSymbol( |
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SLDComparisonOperator oper, String pname, ISymbol sym) {
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double min = 0; |
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double max = 0; |
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SLDBinaryComparisonOperator bc = null;
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SLDIsBetweenOperator bw = null;
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SLDLiteral lit = null;
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if (oper instanceof SLDBinaryComparisonOperator) { |
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bc = (SLDBinaryComparisonOperator) oper; |
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if (isGreaterComparison(bc)) {
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lit = BasicUtils.getLiteral(bc.getExpressions()); |
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try {
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min = Double.parseDouble(lit.getValue());
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max = Double.MAX_VALUE;
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sym.setDescription("> " + lit.getValue());
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} catch (Exception exc) { |
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return null; |
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} |
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} else {
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if (isLessThanComparison(bc)) {
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lit = BasicUtils.getLiteral(bc.getExpressions()); |
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try {
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max = Double.parseDouble(lit.getValue());
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min = -Double.MAX_VALUE;
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sym.setDescription("< " + lit.getValue());
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} catch (Exception exc) { |
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return null; |
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} |
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} else {
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return null; |
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} |
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} |
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} else {
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if (oper instanceof SLDIsBetweenOperator) { |
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bw = (SLDIsBetweenOperator) oper; |
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SLDExpression lower = bw.getLowerBoundary(); |
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SLDExpression upper = bw.getUpperBoundary(); |
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if (lower instanceof SLDLiteral && upper instanceof SLDLiteral) { |
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String lowerstr = ((SLDLiteral) lower).getValue();
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String upperstr = ((SLDLiteral) upper).getValue();
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try {
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min = Double.parseDouble(lowerstr);
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max = Double.parseDouble(upperstr);
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sym.setDescription(lowerstr + " - " + upperstr);
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} catch (Exception exc) { |
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return null; |
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} |
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} else {
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return null; |
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} |
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} else {
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return null; |
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} |
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} |
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return BasicUtils.symMan().createInterval(min, max);
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} |
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private static boolean isLessThanComparison(SLDBinaryComparisonOperator bc) { |
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if (bc == null) { |
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return false; |
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} else {
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String comp = bc.getComparisonOperator();
|
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return comp != null && |
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(comp.compareTo(FilterTags.PROPERTYISLESSOREQUALTHAN) == 0
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|| comp.compareTo(FilterTags.PROPERTYISLESSTHAN) == 0);
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} |
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} |
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|
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private static boolean isGreaterComparison(SLDBinaryComparisonOperator bc) { |
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if (bc == null) { |
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return false; |
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} else {
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String comp = bc.getComparisonOperator();
|
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return comp != null && |
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(comp.compareTo(FilterTags.PROPERTYISGREATEROREQUALTHAN) == 0
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|| comp.compareTo(FilterTags.PROPERTYISGREATERTHAN) == 0);
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} |
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} |
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|
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} |