QueryImpl.java

/*
    Priha - A JSR-170 implementation library.

    Copyright (C) 2007-2009 Janne Jalkanen (Janne.Jalkanen@iki.fi)

    Licensed under the Apache License, Version 2.0 (the "License"); 
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at 
    
      http://www.apache.org/licenses/LICENSE-2.0 
      
    Unless required by applicable law or agreed to in writing, software 
    distributed under the License is distributed on an "AS IS" BASIS, 
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
    See the License for the specific language governing permissions and 
    limitations under the License. 
 */
package org.priha.query;

import javax.jcr.*;
import javax.jcr.lock.LockException;
import javax.jcr.nodetype.ConstraintViolationException;
import javax.jcr.query.Query;
import javax.jcr.query.QueryResult;
import javax.jcr.version.VersionException;

import org.priha.core.SessionImpl;
import org.priha.query.aqt.QueryRootNode;

/**
 *  The root class for Priha query implementations.
 *  
 *  @author Janne Jalkanen
 */
public abstract class QueryImpl implements Query
{
    private QueryRootNode m_root;
    private SessionImpl   m_session;
    private String        m_storedQueryPath = null;
    
    /**
     *  Construct a QueryImpl for a given Session and a given abstract
     *  query tree.  Subclasses are expected to create the AQT.
     *  
     *  @param session The Session against which this Query is created
     *  @param root The AQT Root node
     */
    public QueryImpl(SessionImpl session, QueryRootNode root)
    {
        m_session = session;
        m_root = root;
    }

    public QueryResult execute() throws RepositoryException
    {
        QueryProvider qp = m_session.getWorkspace().getQueryManager().getQueryProvider();
        
        System.out.println( "Executing "+getStatement() );
        
        return qp.query(m_session, m_root);
    }

    public String getStoredQueryPath() throws ItemNotFoundException, RepositoryException
    {
        if( m_storedQueryPath == null ) throw new ItemNotFoundException("This is not a stored query");

        return m_storedQueryPath;
    }

    public Node storeAsNode(String absPath)
                                        throws ItemExistsException,
                                            PathNotFoundException,
                                            VersionException,
                                            ConstraintViolationException,
                                            LockException,
                                            UnsupportedRepositoryOperationException,
                                            RepositoryException
    {
        Node queryNode = m_session.getRootNode().addNode( absPath, "nt:query" );
        
        queryNode.setProperty( "jcr:statement", getStatement() );
        queryNode.setProperty( "jcr:language", getLanguage() );
        
        m_storedQueryPath = queryNode.getPath();
        
        return queryNode;
    }

}