Revision 21563 branches/Mobile_Compatible_Hito_1/libFMap_data/src/org/gvsig/data/vectorial/expressionevaluator/FeatureComparator.java
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package org.gvsig.data.vectorial.expressionevaluator; |
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import java.util.Comparator; |
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import java.util.Iterator; |
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import org.gvsig.data.exception.ReadException; |
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import org.gvsig.data.vectorial.IFeature; |
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import org.gvsig.data.vectorial.IFeatureAttributeDescriptor; |
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import org.gvsig.data.vectorial.IFeatureID; |
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import org.gvsig.data.vectorial.IFeatureType; |
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import org.gvsig.data.vectorial.IsNotFeatureSettingException; |
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public class FeatureComparator implements Comparator {
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protected String expresionString; |
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protected IFeatureType featureType; |
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protected ComparatorToken[] tokens; |
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public FeatureComparator(IFeatureType featureType,String expresion){
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this.featureType=featureType; |
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this.expresionString=expresion; |
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this.initExpressionList(); |
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} |
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protected void initExpressionList(){
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String[] stokens = this.expresionString.split(",");
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tokens = new ComparatorToken[stokens.length]; |
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String stoken; |
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int i; |
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for (i=0;i<stokens.length;i++){
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stoken = stokens[i].trim(); |
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tokens[i] = new ComparatorToken(stoken,this.featureType); |
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} |
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} |
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private IFeature toFeature(Object arg) throws ReadException, IsNotFeatureSettingException{
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if (arg instanceof IFeatureID){
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return ((IFeatureID)arg).getFeature(featureType); |
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} else {
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return (IFeature)arg; |
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} |
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} |
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public int compare(Object arg0, Object arg1) {
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IFeature feature0, feature1; |
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try {
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feature0 = toFeature(arg0); |
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feature1 = toFeature(arg1); |
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} catch (ReadException e1) {
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throw new RuntimeException(e1); |
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//FIXME: OJO!!!! Revisar la excepcion que lanzamos aqui!!!! |
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// Tendriamos que lanzar un ReadException, pero |
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// no podemos por implementar el interface 'Comparator'. |
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} catch (IsNotFeatureSettingException e) {
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throw new RuntimeException(e); |
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} |
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int i,result; |
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for (i=0;i<tokens.length;i++){
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try {
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result=tokens[i].compareFeatures(feature0, feature1); |
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} catch (ReadException e) {
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throw new RuntimeException(e); |
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//FIXME: OJO!!!! Revisar la excepcion que lanzamos aqui!!!! |
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// Tendriamos que lanzar un ReadException, pero |
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// no podemos por implementar el interface 'Comparator'. |
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} |
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if (result != 0){
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return result; |
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} |
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} |
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// Son iguales sus valores, pero si devolvemos |
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// un 0 java puede considera que 'ES EL MISMO OBJETO' |
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// y decidir NO A?ADIR a una lista una de las dos |
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// features. |
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// Por eso comparamo primero sus 'FeatureID' y |
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// si son iguales devolvemos un 0 (es la misma feature) |
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// sino devuelve -1. |
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if (feature0.getID().equals(feature1.getID())){
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return 0; |
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} |
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return -1; |
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} |
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private class ComparatorToken{
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private String textToken; |
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private String textParser; |
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private boolean ascendent=true; |
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private ExpresionEvaluator parser; |
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private IFeatureType featureType; |
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private boolean isSimple=false; |
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public ComparatorToken(String textToken,IFeatureType featureType){
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this.textToken= textToken; |
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this.featureType= featureType; |
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if (this.textToken.toLowerCase().endsWith(" desc")){
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this.textParser = this.textToken.substring(0,this.textToken.length()-5); |
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this.ascendent=false; |
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} else if (this.textToken.toLowerCase().endsWith(" asc")) {
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this.textParser = this.textToken.substring(0,this.textToken.length()-4); |
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} else{
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this.textParser = this.textToken; |
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} |
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Iterator iter = this.featureType.iterator(); |
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IFeatureAttributeDescriptor attribute; |
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while (iter.hasNext()){
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attribute = (IFeatureAttributeDescriptor)iter.next(); |
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if (attribute.getName().equalsIgnoreCase(this.textParser)){
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this.isSimple=true; |
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this.textParser=attribute.getName(); |
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break; |
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} |
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} |
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if (!this.isSimple){
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this.parser = new ExpresionEvaluator(this.textParser,this.featureType); |
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} |
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} |
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public int compareFeatures(IFeature feature0,IFeature feature1) throws ReadException{
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Comparable value0,value1; |
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if (this.isSimple){
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value0 = (Comparable)feature0.get(this.textParser); |
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value1 = (Comparable)feature1.get(this.textParser); |
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}else{
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value0 = parser.getValue(feature0); |
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value1 = parser.getValue(feature1); |
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} |
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if (ascendent){
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if (value0 == null){
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return 1; |
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} else if (value1 == null){
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return -1; |
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} |
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return value0.compareTo(value1); |
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}else{
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if (value1 == null){
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return 1; |
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} else if (value0 == null){
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return -1; |
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} |
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return value1.compareTo(value0); |
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} |
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} |
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} |
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} |
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package org.gvsig.data.vectorial.expressionevaluator; |
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import java.util.Comparator; |
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import java.util.Iterator; |
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import org.gvsig.data.ReadException; |
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import org.gvsig.data.vectorial.Feature; |
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import org.gvsig.data.vectorial.FeatureAttributeDescriptor; |
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import org.gvsig.data.vectorial.FeatureID; |
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import org.gvsig.data.vectorial.FeatureType; |
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import org.gvsig.data.vectorial.IsNotFeatureSettingException; |
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import org.opengis.filter.Filter; |
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import org.opengis.filter.FilterFactory2; |
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import org.opengis.filter.expression.Expression; |
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import org.opengis.filter.sort.SortBy; |
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import org.opengis.filter.sort.SortOrder; |
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public class FeatureComparator implements Comparator {
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protected FeatureType featureType; |
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SortBy[] order; |
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public FeatureComparator(FeatureType featureType, SortBy[] order){
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this.featureType=featureType; |
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this.order=order; |
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} |
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private Feature toFeature(Object arg) throws ReadException, IsNotFeatureSettingException{
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if (arg instanceof FeatureID){
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return ((FeatureID)arg).getFeature(featureType); |
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} else {
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return (Feature)arg; |
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} |
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} |
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public int compare(Object arg0, Object arg1) {
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Feature feature0, feature1; |
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try {
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feature0 = toFeature(arg0); |
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feature1 = toFeature(arg1); |
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} catch (ReadException e1) {
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throw new RuntimeException(e1); |
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//FIXME: OJO!!!! Revisar la excepcion que lanzamos aqui!!!! |
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// Tendriamos que lanzar un ReadException, pero |
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// no podemos por implementar el interface 'Comparator'. |
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} catch (IsNotFeatureSettingException e) {
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throw new RuntimeException(e); |
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} |
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for (int i=0;i<order.length;i++){
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int result = compareFeatures(feature0, |
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feature1, |
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order[i].getSortOrder(), |
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(FeatureAttributeDescriptor)featureType.get(order[i].getPropertyName().getPropertyName()) |
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); |
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if (result!=0) return result; |
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} |
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// Son iguales sus valores, pero si devolvemos |
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// un 0 java puede considera que 'ES EL MISMO OBJETO' |
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// y decidir NO A?ADIR a una lista una de las dos |
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// features. |
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// Por eso comparamo primero sus 'FeatureID' y |
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// si son iguales devolvemos un 0 (es la misma feature) |
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// sino devuelve -1. |
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if (feature0.getID().equals(feature1.getID())){
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return 0; |
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} |
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return -1; |
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} |
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public int compareFeatures(Feature feature1, |
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Feature feature2, |
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SortOrder order, |
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FeatureAttributeDescriptor type){
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int reverse = 1; |
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if (order.equals(SortOrder.DESCENDING)) |
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reverse=-1; |
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int pos = type.ordinal(); |
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if (feature1.get(pos).equals(feature2.get(pos))) |
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return 0; |
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if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_BOOLEAN)){
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if (feature1.getBoolean(pos)== false) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_BYTE)){
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if (feature1.getByte(pos)<feature2.getByte(pos)) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_DATE)){
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if (feature1.getDate(pos).before(feature2.getDate(pos))) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_DOUBLE)){
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if (feature1.getDouble(pos)<feature2.getDouble(pos)) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_FLOAT)){
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if (feature1.getFloat(pos)<feature2.getFloat(pos)) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_INT)){
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if (feature1.getInt(pos)<feature2.getInt(pos)) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_LONG)){
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if (feature1.getLong(pos)<feature2.getLong(pos)) return -1 * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_STRING)){
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return feature1.getString(pos).compareTo(feature2.getString(pos)) * reverse; |
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}else if (type.getDataType().equals(FeatureAttributeDescriptor.TYPE_GEOMETRY)){
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return -1; //TODO: How to order by geometries? |
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} |
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return reverse; |
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} |
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} |
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Also available in: Unified diff