svn-gvsig-desktop / trunk / libraries / libFMap_dataFile / src / org / gvsig / data / datastores / vectorial / file / dbf / DBFFeatureCollectionBitSet.java @ 20660
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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.BitSet; |
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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.exception.ReadException; |
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import org.gvsig.data.vectorial.FeatureCollection; |
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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.expressionevaluator.FeatureFilter; |
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import org.gvsig.util.observer.Observable; |
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//FIXME: OJO Excepciones
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public class DBFFeatureCollectionBitSet extends FeatureCollection { |
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protected BitSet bitSet=new BitSet(); |
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protected Observable observable = new Observable(); |
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protected IFeatureType featureType;
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protected DBFStore store;
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protected String filter; |
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protected FeatureFilter parser;
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protected long driverFeatureCount; |
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protected DBFFeatureCollectionBitSet(DBFStore store,IFeatureType type, String filter) throws ReadException { |
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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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driverFeatureCount=store.getFeatureCount(); |
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this.store=store;
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intilizeFeatureIDs(); |
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} |
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protected void intilizeFeatureIDs() throws ReadException { |
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try{
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bitSet.clear(); |
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if (filter==null){ |
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for (int i = 0; i < driverFeatureCount; i++) { |
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bitSet.set(i); |
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} |
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}else{
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for (int i = 0; i < driverFeatureCount; i++) { |
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IFeatureID featureID=(IFeatureID)createCurrentFeatureID(i); |
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if (parser.match(featureID.getFeature(featureType))){
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bitSet.set(i); |
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} |
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} |
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} |
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}catch (Exception e) { |
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throw new ReadException("DBFFeatureCollectionBitSet",e); |
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} |
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} |
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protected IFeatureID 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 int size() { |
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return bitSet.cardinality();
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} |
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public boolean isEmpty() { |
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return bitSet.isEmpty();
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} |
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public boolean contains(Object o) { |
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if (o instanceof IFeature){ |
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return bitSet.get((int)((DBFFeatureID)((IFeature)o).getID()).getIndex()); |
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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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DBFBitSetIterator dbfIter=new DBFBitSetIterator(bitSet);
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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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private class DBFBitSetIterator implements Iterator{ |
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private BitSet bs; |
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private int current=-1; |
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public DBFBitSetIterator(BitSet bitSet){ |
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this.bs=bitSet;
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} |
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public boolean hasNext() { |
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return (bs.nextSetBit(current+1) >= 0); |
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} |
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public Object next() { |
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IFeature feature=null;
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if (!this.hasNext()){ |
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throw new NoSuchElementException(); |
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} |
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current = bs.nextSetBit(current+1);
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try {
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feature = createCurrentFeatureID(current).getFeature(featureType);//new DBFFeature(featureType,store,current);
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} catch (ReadException e) {
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throw new RuntimeException(e); |
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} |
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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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observable.deleteObservers(); |
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this.observable = null; |
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this.bitSet.clear();
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this.featureType = null; |
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} |
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} |