root / branches / Mobile_Compatible_Hito_1 / libFMap_dataFile / src / org / gvsig / data / datastores / vectorial / file / dbf / DBFFeatureCollection.java @ 21571
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package org.gvsig.data.datastores.vectorial.file.dbf; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import org.gvsig.data.ReadException; |
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import org.gvsig.data.vectorial.AbstractFeatureCollection; |
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import org.gvsig.data.vectorial.FeatureManager; |
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import org.gvsig.data.vectorial.Feature; |
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import org.gvsig.data.vectorial.FeatureID; |
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import org.gvsig.data.vectorial.FeatureStore; |
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import org.gvsig.data.vectorial.FeatureType; |
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//import org.gvsig.data.vectorial.expressionevaluator.FeatureFilter;
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import org.gvsig.util.observer.DefaultObservable; |
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import org.opengis.filter.Filter; |
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public class DBFFeatureCollection extends AbstractFeatureCollection { |
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protected DefaultObservable observable = new DefaultObservable(); |
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protected ArrayList featureIDs=new ArrayList();//<FeatureID> |
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protected FeatureType featureType;
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protected Filter filter; |
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protected FeatureStore store;
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//private FeatureFilter parser = null;
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protected FeatureManager featureManager;
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protected long driverFeatureCount=0; |
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protected long size=-1; |
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public DBFFeatureCollection(FeatureManager fm,DBFStore store,FeatureType type, Filter filter) throws ReadException { |
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this.featureManager=fm;
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this.store=store;
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driverFeatureCount=store.getFeatureCount(); |
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this.featureType=type;
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this.filter=filter;
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//if (this.filter!=null)
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// parser = new FeatureFilter(filter,this.featureType);
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} |
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public int size() { |
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this.checkModified();
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if (this.size < 0){ |
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if (filter==null){ |
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this.size = driverFeatureCount;
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if (featureManager!=null){ |
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this.size += featureManager.getNum();
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} |
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} else {
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Iterator iterator= this.iterator(); |
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this.size=0; |
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try {
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while(true){ |
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iterator.next(); |
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size++; |
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} |
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} catch (NoSuchElementException e) { |
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//End
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} |
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} |
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} |
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return (int)this.size; |
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} |
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public boolean isEmpty() { |
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this.checkModified();
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return (size()==0); |
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} |
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public boolean contains(Object o) { |
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this.checkModified();
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Iterator iterator= this.iterator(); |
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while(iterator.hasNext()){
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Feature feature=(Feature)iterator.next(); |
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if (feature.getID().equals(((Feature)o).getID())){
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return true; |
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} |
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} |
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return false; |
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} |
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public Iterator iterator() { |
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this.checkModified();
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DBFIterator dbfIter=new DBFIterator(this.featureType); |
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return dbfIter;
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} |
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public Object[] toArray() { |
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this.checkModified();
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ArrayList features= new ArrayList(); |
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Iterator iterator= this.iterator(); |
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while(iterator.hasNext()){
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Feature feature=(Feature)iterator.next(); |
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features.add(feature); |
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} |
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return features.toArray();
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} |
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public Object[] toArray(Object[] a) { |
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this.checkModified();
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ArrayList features= new ArrayList(); |
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Iterator iterator= this.iterator(); |
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while(iterator.hasNext()){
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Feature feature=(Feature)iterator.next(); |
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features.add(feature); |
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} |
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return features.toArray(a);
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} |
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public boolean add(Object o) { |
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throw new UnsupportedOperationException(); |
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} |
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public boolean remove(Object o) { |
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throw new UnsupportedOperationException(); |
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} |
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public boolean containsAll(Collection c) { |
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this.checkModified();
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Iterator iter = c.iterator();
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while (iter.hasNext()){
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if (!this.contains(iter.next())){ |
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return false; |
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} |
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} |
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return true; |
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} |
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public boolean addAll(Collection c) { |
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throw new UnsupportedOperationException(); |
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} |
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public boolean removeAll(Collection c) { |
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throw new UnsupportedOperationException(); |
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} |
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public boolean retainAll(Collection c) { |
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throw new UnsupportedOperationException(); |
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} |
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public void clear() { |
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throw new UnsupportedOperationException(); |
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} |
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protected class DBFIterator implements Iterator{ |
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protected long position=0; |
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private boolean nextChecked=false; |
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private Feature feature;
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private FeatureType featureType;
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public DBFIterator(FeatureType featureType){
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this.featureType=featureType;
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position=0;
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} |
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protected FeatureID createCurrentFeatureID(long pos){ |
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if (pos<driverFeatureCount){
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return new DBFFeatureID((DBFStore)store,pos); |
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} else {
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return null; |
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} |
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} |
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public boolean hasNext(){ |
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checkModified(); |
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Feature feature=null;
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if (nextChecked){
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return this.feature != null; |
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} |
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nextChecked=true;
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while (true){ |
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if (position<driverFeatureCount){
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FeatureID featureID = this.createCurrentFeatureID(position);
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try {
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feature=featureID.getFeature(featureType); |
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} catch (ReadException e) {
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throw new RuntimeException(e); |
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} |
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}else if (featureManager!=null && (position-driverFeatureCount)<featureManager.getNum()){ |
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int pos=(int)(position-driverFeatureCount); |
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try {
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feature=featureManager.getFeature(pos,store,this.featureType);
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} catch (ReadException e) {
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throw new RuntimeException(e); |
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} |
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}else{
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this.feature = null; |
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return false; |
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} |
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position++; |
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if(featureManager!=null && featureManager.isDeleted(feature)) |
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continue;
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if (filter == null) { |
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this.feature=feature;
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return true; |
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} else {
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if (filter.evaluate(feature)){
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this.feature=feature;
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return true; |
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}else{
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continue;
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} |
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} |
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} |
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} |
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public Object next() { |
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checkModified(); |
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if (!nextChecked){
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hasNext(); |
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} |
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if (this.feature == null) |
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throw new NoSuchElementException(); |
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nextChecked=false;
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Feature feature = this.feature;
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this.feature = null; |
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return feature;
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} |
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public void remove() { |
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throw new UnsupportedOperationException(); |
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} |
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} |
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public void dispose() { |
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this.observable.deleteObservers();
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this.observable = null; |
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this.featureIDs.clear();
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this.featureIDs = null; |
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this.featureType = null; |
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this.store = null; |
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this.filter = null; |
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this.featureManager = null; |
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; |
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} |
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} |