root / branches / v2_0_0_prep / libraries / libFMap_dataDB / src / org / gvsig / fmap / data / feature / db / jdbc / postgresqlbin / PostgresqlBinFeatureCollection.java @ 23680
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package org.gvsig.fmap.data.feature.db.jdbc.postgresqlbin; |
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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.ConcurrentModificationException; |
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import java.util.Iterator; |
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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.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.db.jdbc.AbstractJDBCIterator; |
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import org.gvsig.fmap.data.feature.db.jdbc.SQLException; |
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import org.gvsig.tools.exception.BaseException; |
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public class PostgresqlBinFeatureCollection extends DBDataFeatureCollection { |
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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 PostgresqlBinStore store;
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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 int fetchSize=5000; |
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public PostgresqlBinFeatureCollection(PostgresqlBinStore store,FeatureType type, String filter, String order) { |
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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.order=order;
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this.calculateWhere();
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this.calculateOrder();
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if (store.isUseSqlSource()){
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this.sql = store.getSqlSource();
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this.sqlCount = null; |
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} else {
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this.sql = this.store.getSqlSelectPart(); |
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this.sqlCount = "Select count(*) From "+ ((PostgresqlBinStoreParameters)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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} |
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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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Connection conn = this.store.getConnection(); |
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try {
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Statement st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
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return st.executeQuery(aSql);
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} catch (java.sql.SQLException e) {
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throw new SQLException(aSql,this.store.getName(),e); |
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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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private void calculateOrder(){ |
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if (isStringEmpty(this.store.getBaseOrder())){ |
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this.totalOrder = this.order; |
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} else {
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this.totalOrder = this.store.getBaseOrder() + ", " +this.order; |
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} |
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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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try {
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if (this.sqlCount != null){ |
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r = this.getNewResulset(this.sqlCount); |
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r.next(); |
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numReg = r.getInt(1);
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} else{
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this.numReg = 0; |
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r = this.getNewResulset(this.sql); |
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while (r.next()){
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this.numReg++;
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} |
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} |
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} catch (java.sql.SQLException e) {
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throw new ReadException(this.store.getName(),e); |
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} finally{
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try {
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if (r != null) { |
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r.close(); |
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} |
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} catch (java.sql.SQLException e) {
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throw new ReadException(this.store.getName(),e); |
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} |
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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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protected Iterator internalIterator(int index) { |
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PostgresqlIterator dbfIter; |
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try {
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dbfIter = new PostgresqlIterator(this.store, this.featureType, |
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this.sql, this.fetchSize, index + 1); |
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} catch (ReadException e) {
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throw new RuntimeException(e); |
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} |
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return dbfIter;
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} |
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protected class PostgresqlIterator extends AbstractJDBCIterator { |
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private String cursorName = null; |
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public PostgresqlIterator(PostgresqlBinStore store,
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DBFeatureType featureType, String sql, int fetchSize, |
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int initialPosition)
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throws ReadException {
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super(store, featureType, sql, fetchSize, null, null, |
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initialPosition); |
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} |
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protected void createResulset() throws ReadException { |
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if (this.cursorName == null) { |
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this.createResulset();
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} |
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super.createResulset();
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} |
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protected void createCursor() throws ReadException { |
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//Comprobar que no se ha inicializado
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((PostgresqlBinStore) this.store).open();
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Connection conn = ((PostgresqlBinStore) this.store).getConnection(); |
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String mSql= null; |
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try {
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Statement st = conn.createStatement();
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this.cursorName = PostgresqlBinStoreUtils.createCursorName();
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mSql="BEGIN";
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st.execute(mSql); |
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mSql="declare " + this.cursorName + " binary cursor for " + this.sql; |
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st.execute("msql");
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// System.out.println(mSql);
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} catch (java.sql.SQLException e) {
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throw new SQLException(mSql,this.store.getName(),e); |
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} |
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} |
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protected Feature createFeatureFromTheResulset() throws ReadException { |
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return ((PostgresqlBinStore) this.store).createFeatureFromResulset( |
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this.rs, this.featureType); |
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} |
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protected void close() throws java.sql.SQLException { |
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if (rs == null) { |
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return;
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} |
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try {
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super.close();
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} finally{
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Statement st;
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try {
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Connection conn = ((PostgresqlBinStore) this.store) |
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.getConnection(); |
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st = conn.createStatement(); |
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st.execute("Rollback");
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} catch (java.sql.SQLException e) {
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (ReadException e) {
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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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( |
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"FeatureCollection modified");
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} |
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} |
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protected String getFinalResulsetSQL() { |
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return "fetch forward " + this.fetchSize + " in " + this.cursorName; |
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} |
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protected Connection getConnection() throws ReadException { |
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((PostgresqlBinStore) this.store).open();
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return ((PostgresqlBinStore) this.store).getConnection(); |
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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.featureType=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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} |