root / trunk / libraries / libDataSourceDBBaseDrivers / src / org / gvsig / data / datastores / vectorial / driver / jdbc / h2 / H2FeatureCollection.java @ 19610
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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.IFeatureAttributeDescriptor; |
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import org.gvsig.data.vectorial.IFeatureType; |
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import org.gvsig.exceptions.BaseException; |
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import com.iver.cit.gvsig.fmap.drivers.WKBParser2; |
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public class H2FeatureCollection extends AbstractFeatureCollection { |
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protected ComplexObservable observable = new ComplexObservable(); |
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protected DBFeatureType featureType;
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protected String filter; |
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protected String totalFilter; |
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protected H2Driver driver;
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protected ResultSet rs; |
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private WKBParser2 wkbParser = new WKBParser2(); |
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private String order; |
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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 Statement statement; |
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public H2FeatureCollection(H2Driver driver,IFeatureType type, String filter, String order) { |
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this.driver=driver;
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this.featureType=(DBFeatureType)type;
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this.filter=filter;
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this.order=order;
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this.calculateWhere();
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this.calculateOrder();
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this.sql = this.driver.getSqlSelectPart(); |
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this.sqlCount = "Select count(" + type.getFieldId() +") "; |
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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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} |
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public H2FeatureCollection(H2Driver driver,IFeatureType type, String sql) { |
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this.driver=driver;
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this.featureType=(DBFeatureType)type;
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this.filter=null; |
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this.order=null; |
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this.sql = sql;
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} |
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private ResultSet getNewResulset(String aSql) throws ReadException{ |
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this.driver.open();
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this.connection = this.driver.getConnection(); |
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try {
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if (this.statement == null){ |
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this.statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
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} |
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return rs = this.statement.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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private void calculateWhere(){ |
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if (isStringEmpty(this.driver.getBaseWhereClause())){ |
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this.totalFilter = this.filter; |
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} else {
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this.totalFilter = "(" + this.driver.getBaseWhereClause() + ") and " +this.filter; |
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} |
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} |
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private void calculateOrder(){ |
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if (isStringEmpty(this.driver.getBaseOrder())){ |
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this.totalOrder = this.order; |
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} else {
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this.totalOrder = this.driver.getBaseOrder() + ", " +this.order; |
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} |
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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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System.err.println("numReg = " + numReg); |
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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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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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ResultSet r;
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try {
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r = this.getNewResulset(this.sqlCount); |
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} catch (ReadException e) {
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throw new RuntimeException(e); |
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} |
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H2Iterator dbfIter=new H2Iterator(this.driver,this.featureType,r); |
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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 H2Iterator implements Iterator{ |
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private ResultSet rs; |
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private H2Driver driver;
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private DBFeatureType featureType;
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public H2Iterator(H2Driver driver,DBFeatureType featureType ,ResultSet rs){ |
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this.rs = rs;
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this.driver = driver;
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this.featureType = featureType;
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} |
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public boolean hasNext(){ |
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try {
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if (rs.isLast()){
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return false; |
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} else {
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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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} |
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public Object next() { |
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if (!hasNext())
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throw new NoSuchElementException(); |
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return nextFeature();
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} |
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private IFeature nextFeature() {
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try {
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IFeature feature=null;
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try {
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if(rs.next()){
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feature = H2DriverUtils.createFeature(this.driver, this.rs, this.featureType); |
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} else {
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throw new NoSuchElementException(); |
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} |
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if (rs.isAfterLast()){
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rs.close(); |
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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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return feature;
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} catch (BaseException 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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} |
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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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} |