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Java JDBC 4.0 (JRE 6+) driver for PostgreSQL database

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/*-------------------------------------------------------------------------
*
* Copyright (c) 2004-2014, PostgreSQL Global Development Group
* Copyright (c) 2004, Open Cloud Limited.
*
*
*-------------------------------------------------------------------------
*/
package org.postgresql.core.v3;

import org.postgresql.core.*;

/**
 * V3 Query implementation for queries that involve multiple statements.
 * We split it up into one SimpleQuery per statement, and wrap the
 * corresponding per-statement SimpleParameterList objects in
 * a CompositeParameterList.
 *
 * @author Oliver Jowett ([email protected])
 */
class CompositeQuery implements V3Query {
    CompositeQuery(SimpleQuery[] subqueries, int[] offsets) {
        this.subqueries = subqueries;
        this.offsets = offsets;
    }

    public ParameterList createParameterList() {
        SimpleParameterList[] subparams = new SimpleParameterList[subqueries.length];
        for (int i = 0; i < subqueries.length; ++i)
            subparams[i] = (SimpleParameterList)subqueries[i].createParameterList();
        return new CompositeParameterList(subparams, offsets);
    }

    public String toString(ParameterList parameters) {
        StringBuilder sbuf = new StringBuilder(subqueries[0].toString());
        for (int i = 1; i < subqueries.length; ++i)
        {
            sbuf.append(';');
            sbuf.append(subqueries[i]);
        }
        return sbuf.toString();
    }

    public String toString() {
        return toString(null);
    }

    public void close() {
        for (SimpleQuery subquery : subqueries) {
            subquery.close();
        }
    }

    public SimpleQuery[] getSubqueries() {
        return subqueries;
    }

    public boolean isStatementDescribed() {
        for (SimpleQuery subquery : subqueries)
            if (!subquery.isStatementDescribed()) {
                return false;
            }
        return true;
    }

    public boolean isEmpty()
    {
        for (SimpleQuery subquery : subqueries)
            if (!subquery.isEmpty()) {
                return false;
            }
        return true;
    }

    private final SimpleQuery[] subqueries;
    private final int[] offsets;
}