root / trunk / libraries / libDataSourceBaseDrivers / src / org / gvsig / data / datastores / vectorial / driver / dbf / DBFFeatureCollection.java @ 19673
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package org.gvsig.data.datastores.vectorial.driver.dbf; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.ConcurrentModificationException; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import org.gvsig.data.ComplexObservable; |
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import org.gvsig.data.datastores.vectorial.driver.AbstractDriver; |
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import org.gvsig.data.exception.ReadException; |
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import org.gvsig.data.vectorial.AbstractFeatureCollection; |
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import org.gvsig.data.vectorial.IFeature; |
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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.expansionadapter.FeatureManager; |
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import org.gvsig.data.vectorial.filter.FeatureFilterParser; |
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public class DBFFeatureCollection extends AbstractFeatureCollection { |
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protected ComplexObservable observable = new ComplexObservable(); |
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protected ArrayList featureIDs=new ArrayList();//<IFeatureID> |
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protected IFeatureType featureType;
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protected String filter; |
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protected AbstractDriver driver;
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private FeatureFilterParser 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,DBFDriver driver,IFeatureType type, String filter) { |
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this.featureManager=fm;
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this.driver=driver;
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driverFeatureCount=driver.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 FeatureFilterParser(filter,this.featureType); |
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} |
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protected void checkModified(){ |
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if (modified)
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throw new ConcurrentModificationException("FeatureCollection modified"); |
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} |
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public int size() { |
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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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return (size()==0); |
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} |
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public boolean contains(Object o) { |
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Iterator iterator= this.iterator(); |
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while(iterator.hasNext()){
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IFeature feature=(IFeature)iterator.next(); |
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if (feature.getID().equals(((IFeature)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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DBFIterator dbfIter=new DBFIterator();
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return dbfIter;
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} |
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public Object[] toArray() { |
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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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IFeature feature=(IFeature)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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ArrayList features= new ArrayList(); |
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Iterator iterator= this.iterator(); |
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while(iterator.hasNext()){
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IFeature feature=(IFeature)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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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 IFeature feature;
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public DBFIterator(){
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position=0;
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} |
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protected void checkModified(){ |
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if (modified)
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throw new ConcurrentModificationException("FeatureCollection modified"); |
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} |
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protected IFeatureID createCurrectDriverFeatureID(long pos){ |
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if (pos<driverFeatureCount){
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return new DBFFeatureID((DBFDriver)driver,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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IFeature 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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IFeatureID featureID = this.createCurrectDriverFeatureID(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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feature=featureManager.getFeature(pos); |
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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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try {
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if (parser.match(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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} catch (Exception e) { |
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throw new RuntimeException(e); |
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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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IFeature 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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} |