root / branches / v2_0_0_prep / libraries / libFMap_dataDB / src / org / gvsig / fmap / data / feature / db / jdbc / h2 / H2FeatureCollectionEditingFiltered.java @ 23680
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package org.gvsig.fmap.data.feature.db.jdbc.h2; |
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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.fmap.data.DataManager; |
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import org.gvsig.fmap.data.DataStore; |
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import org.gvsig.fmap.data.ReadException; |
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import org.gvsig.fmap.data.feature.Feature; |
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import org.gvsig.fmap.data.feature.FeatureManager; |
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import org.gvsig.fmap.data.feature.FeatureType; |
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import org.gvsig.fmap.data.feature.db.DBDataFeatureCollection; |
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import org.gvsig.fmap.data.feature.db.DBFeatureType; |
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import org.gvsig.fmap.data.feature.expressionevaluator.Filter; |
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import org.gvsig.tools.exception.BaseException; |
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public class H2FeatureCollectionEditingFiltered extends DBDataFeatureCollection { |
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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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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 FeatureManager featureManager;
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private Filter parser; |
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private int fetchSize = 5000; |
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H2FeatureCollectionEditingFiltered(FeatureManager fm, H2Store store, |
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FeatureType type, String filter) throws ReadException { |
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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(*) 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 = DataManager.getManager().getExpressionParser() |
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.parseFilter(filter); |
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} |
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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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public int size() { |
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checkModified(); |
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if (this.numReg < 0){ |
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this.numReg=0; |
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try{
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Iterator iter =this.iterator(); |
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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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} |
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protected Iterator internalIterator(int index) { |
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checkModified(); |
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try{
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H2Iterator dbIter = new H2Iterator(this.store, this.featureType, |
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this.sql, this.fetchSize, this.featureManager, this.parser, |
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index + 1);
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return dbIter;
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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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protected class H2Iterator extends AbstractH2DBIterator { |
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public H2Iterator(H2Store store, DBFeatureType featureType,
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String sql,
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int fetchSize, FeatureManager featureManager,
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Filter featureFilter, int initialPosition) |
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throws ReadException {
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super(store, featureType, sql, fetchSize, featureManager,
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featureFilter, initialPosition); |
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} |
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protected Feature createFeatureFromTheResulset() throws ReadException { |
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return ((H2Store) this.store).createFeatureFromResulset(this.rs, |
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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( |
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"FeatureCollection modified");
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} |
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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 Feature feature;
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private FeatureManager featureManager;
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private FeatureType featureType;
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public H2IteratorMemory(DBFeatureType featureType, FeatureManager featureManager){
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this.featureType = featureType;
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position=0;
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this.featureManager=featureManager;
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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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} |
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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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Feature 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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try {
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feature=featureManager.getFeature((int)position,store,this.featureType); |
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} catch (ReadException e) {
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throw new RuntimeException( |
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new ReadException(store.getName(),e)
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); |
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} |
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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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} |
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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.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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} 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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} |
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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.store.deleteObserver(this); |
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this.store = null; |
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this.featureManager = null; |
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this.featureType = null; |
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this.parser= null; |
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} |
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public boolean isFromStore(DataStore store) { |
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return this.store.equals(store); |
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} |
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public FeatureType getFeatureType() {
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return this.featureType; |
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} |
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} |