root / trunk / libraries / libDataSourceDBBaseDrivers / src / org / gvsig / data / datastores / vectorial / driver / jdbc / h2 / H2FeatureCollectionEditingFiltered.java @ 19744
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package org.gvsig.data.datastores.vectorial.driver.jdbc.h2; |
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import java.sql.Connection; |
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import java.sql.ResultSet; |
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import java.sql.Statement; |
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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.jdbc.DBFeatureType; |
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import org.gvsig.data.datastores.vectorial.driver.jdbc.exception.SQLException; |
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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.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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import org.gvsig.exceptions.BaseException; |
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public class H2FeatureCollectionEditingFiltered extends AbstractFeatureCollection { |
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protected ComplexObservable observable = new ComplexObservable(); |
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protected DBFeatureType featureType;
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protected String totalFilter; |
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protected String filter; |
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protected H2Store store;
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protected ResultSet rs; |
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private int numReg=-1; |
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private String sql; |
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private String sqlCount; |
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private String totalOrder; |
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private Connection connection; |
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private FeatureManager featureManager;
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private FeatureFilterParser parser;
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public H2FeatureCollectionEditingFiltered(FeatureManager fm,H2Store store,IFeatureType type,String filter) { |
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this.featureManager=fm;
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this.store=store;
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this.featureType=(DBFeatureType)type;
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this.filter = filter;
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this.calculateWhere();
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this.totalOrder = store.getBaseOrder();
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this.sql = this.store.getSqlSelectPart(); |
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this.sqlCount = "Select count(" + type.getFieldId() +") From "+ ((H2StoreParameters)this.store.getParameters()).tableID(); |
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if (!isStringEmpty(this.totalFilter)){ |
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this.sql= this.sql + " Where " + this.totalFilter; |
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this.sqlCount= this.sqlCount + " Where " + this.totalFilter; |
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} |
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if (!isStringEmpty(this.totalOrder)){ |
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this.sql= this.sql + " Order by " + this.totalOrder; |
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} |
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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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private void calculateWhere(){ |
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if (isStringEmpty(this.store.getBaseWhereClause())){ |
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this.totalFilter = this.filter; |
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} else {
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this.totalFilter = "(" + this.store.getBaseWhereClause() + ") and " +this.filter; |
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} |
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} |
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private ResultSet getNewResulset(String aSql) throws ReadException{ |
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this.store.open();
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this.connection = this.store.getConnection(); |
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try {
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Statement st = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
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return rs = st.executeQuery(aSql);
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} catch (java.sql.SQLException e) {
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throw new SQLException(aSql,"H2FeatureCollection",e); |
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} |
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} |
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private boolean isStringEmpty(String s){ |
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return s == null || s == ""; |
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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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try {
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if (this.numReg < 0){ |
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ResultSet r=null; |
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r = this.getNewResulset(this.sqlCount); |
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try {
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r.next(); |
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numReg = r.getInt(1);
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} catch (java.sql.SQLException e) {
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throw new ReadException("H2FeatureCollection.size",e); |
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} finally{
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try {
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r.close(); |
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} catch (java.sql.SQLException e) {
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throw new ReadException("H2FeatureCollection.size",e); |
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} |
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} |
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try{
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Iterator iter = new H2IteratorMemory(this.featureType); |
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while (true){ |
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iter.next(); |
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numReg++; |
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} |
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} catch (NoSuchElementException e){ |
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//Normal condition exit
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} |
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} |
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return numReg;
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} catch (BaseException e){
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throw new RuntimeException(e); |
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} |
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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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//FIXME: obtimizar
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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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try{
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ResultSet r=null; |
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r = this.getNewResulset(this.sql); |
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H2Iterator dbfIter=new H2Iterator(this.store,r,this.featureType); |
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return dbfIter;
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} catch (BaseException e){
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throw new RuntimeException(e); |
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} |
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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 H2Iterator implements Iterator{ |
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private Iterator dbIter; |
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private Iterator mIter; |
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public H2Iterator(H2Store store, ResultSet rs, DBFeatureType featureType){ |
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this.dbIter = new H2IteratorDB(store,rs,featureType); |
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this.mIter = new H2IteratorMemory(featureType); |
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} |
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public boolean hasNext() { |
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return dbIter.hasNext() || mIter.hasNext();
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} |
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public Object next() { |
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if (dbIter.hasNext()){
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return dbIter.next();
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} |
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return mIter.next();
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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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protected class H2IteratorDB implements Iterator{ |
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private boolean nextChecked=false; |
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private IFeature feature;
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private ResultSet rs; |
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private H2Store store;
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private DBFeatureType featureType;
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private boolean rsEOF=false; |
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public H2IteratorDB(H2Store store, ResultSet rs, DBFeatureType featureType){ |
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this.store = store;
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this.rs = rs;
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this.featureType = 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 boolean hasNext(){ |
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checkModified(); |
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if (nextChecked){
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return this.feature != null; |
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} |
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IFeature feature=null;
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nextChecked=true;
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while (true){ |
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if (!rsEOF){
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try {
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if (rs.isLast()){
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rs.close(); |
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rsEOF=true;
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continue;
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} else {
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feature=nextH2Feature(); |
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if(featureManager.isDeleted(feature))
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continue;
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this.feature=feature;
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return true; |
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} |
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} catch (java.sql.SQLException e) {
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throw new RuntimeException( |
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new ReadException("H2FeatureCollection",e) |
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); |
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} |
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}else {
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return false; |
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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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private IFeature nextH2Feature() {
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IFeature feature=null;
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try {
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if(rs.next()){
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feature=H2Utils.createFeature(this.store, this.rs, featureType); |
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} |
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} catch (java.sql.SQLException e) {
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throw new RuntimeException( |
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new ReadException("H2FeatureCollection",e) |
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); |
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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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protected class H2IteratorMemory 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 H2IteratorMemory(DBFeatureType featureType){
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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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public boolean hasNext(){ |
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checkModified(); |
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if (nextChecked){
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return this.feature != null; |
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} |
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IFeature feature=null;
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nextChecked=true;
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while (true){ |
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if (position<featureManager.getNum()){
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feature=featureManager.getFeature((int)position);
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position++; |
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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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if(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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} |