/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.exoplatform.services.jcr.impl.core.query;
import java.text.NumberFormat;
import javax.jcr.ItemExistsException;
import javax.jcr.ItemNotFoundException;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.jcr.UnsupportedRepositoryOperationException;
import javax.jcr.lock.LockException;
import javax.jcr.nodetype.ConstraintViolationException;
import javax.jcr.query.InvalidQueryException;
import javax.jcr.query.QueryResult;
import javax.jcr.version.VersionException;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.jcr.core.ExtendedNode;
import org.exoplatform.services.jcr.core.nodetype.NodeTypeDataManager;
import org.exoplatform.services.jcr.dataflow.ItemState;
import org.exoplatform.services.jcr.dataflow.PlainChangesLog;
import org.exoplatform.services.jcr.datamodel.NodeData;
import org.exoplatform.services.jcr.datamodel.QPath;
import org.exoplatform.services.jcr.impl.Constants;
import org.exoplatform.services.jcr.impl.core.JCRPath;
import org.exoplatform.services.jcr.impl.core.LocationFactory;
import org.exoplatform.services.jcr.impl.core.NodeImpl;
import org.exoplatform.services.jcr.impl.core.SessionDataManager;
import org.exoplatform.services.jcr.impl.core.SessionImpl;
import org.exoplatform.services.jcr.impl.dataflow.TransientNodeData;
import org.exoplatform.services.jcr.impl.dataflow.TransientPropertyData;
import org.exoplatform.services.jcr.impl.dataflow.TransientValueData;
import org.exoplatform.services.log.ExoLogger;
/**
* Provides the default implementation for a JCR query.
*/
public class QueryImpl
extends AbstractQueryImpl
{
/**
* The logger instance for this class
*/
private static final Log log = ExoLogger.getLogger(QueryImpl.class);
/**
* The session of the user executing this query
*/
protected SessionImpl session;
/**
* The query statement
*/
protected String statement;
/**
* The syntax of the query statement
*/
protected String language;
/**
* The actual query implementation that can be executed
*/
protected ExecutableQuery query;
/**
* The node where this query is persisted. Only set when this is a persisted
* query.
*/
protected Node node;
/**
* The query handler for this query.
*/
protected QueryHandler handler;
/**
* Flag indicating whether this query is initialized.
*/
private boolean initialized = false;
/**
* The maximum result size
*/
private long limit;
/**
* The offset in the total result set
*/
private long offset;
private LocationFactory sessionLocationFactory;
/**
* @inheritDoc
*/
@Override
public void init(SessionImpl session, SessionDataManager itemMgr, QueryHandler handler, String statement,
String language) throws InvalidQueryException
{
checkNotInitialized();
this.session = session;
this.sessionLocationFactory = session.getLocationFactory();
this.statement = statement;
this.language = language;
this.handler = handler;
this.query = handler.createExecutableQuery(session, itemMgr, statement, language);
setInitialized();
}
/**
* @inheritDoc
*/
@Override
public void init(SessionImpl session, SessionDataManager itemMgr, QueryHandler handler, Node node)
throws InvalidQueryException, RepositoryException
{
checkNotInitialized();
this.session = session;
this.node = node;
this.handler = handler;
this.sessionLocationFactory = session.getLocationFactory();
if (!((ExtendedNode) node).isNodeType(Constants.NT_QUERY))
{
throw new InvalidQueryException("node is not of type nt:query");
}
statement = node.getProperty("jcr:statement").getString();
language = node.getProperty("jcr:language").getString();
query = handler.createExecutableQuery(session, itemMgr, statement, language);
setInitialized();
}
/**
* This method simply forwards the <code>execute</code> call to the
* {@link ExecutableQuery} object returned by
* {@link QueryHandler#createExecutableQuery}. {@inheritDoc}
*/
public QueryResult execute() throws RepositoryException
{
checkInitialized();
long time = System.currentTimeMillis();
QueryResult result = query.execute(offset, limit);
if (log.isDebugEnabled())
{
time = System.currentTimeMillis() - time;
NumberFormat format = NumberFormat.getNumberInstance();
format.setMinimumFractionDigits(2);
format.setMaximumFractionDigits(2);
String seconds = format.format((double) time / 1000);
log.debug("executed in " + seconds + " s. (" + statement + ")");
}
return result;
}
/**
* {@inheritDoc}
*/
public String getStatement()
{
checkInitialized();
return statement;
}
/**
* {@inheritDoc}
*/
public String getLanguage()
{
checkInitialized();
return language;
}
/**
* {@inheritDoc}
*/
public String getStoredQueryPath() throws ItemNotFoundException, RepositoryException
{
checkInitialized();
if (node == null)
{
throw new ItemNotFoundException("not a persistent query");
}
return node.getPath();
}
/**
* {@inheritDoc}
*/
public Node storeAsNode(String absPath) throws ItemExistsException, PathNotFoundException, VersionException,
ConstraintViolationException, LockException, UnsupportedRepositoryOperationException, RepositoryException
{
checkInitialized();
JCRPath path = session.getLocationFactory().parseAbsPath(absPath);
QPath qpath = path.getInternalPath();
NodeImpl parent = (NodeImpl) session.getTransientNodesManager().getItem(qpath.makeParentPath(), false);
if (parent == null)
throw new PathNotFoundException("Parent not found for " + path.getAsString(false));
// validate as on parent child node
parent.validateChildNode(qpath.getName(), Constants.NT_QUERY);
NodeData queryData =
TransientNodeData.createNodeData((NodeData) parent.getData(), qpath.getName(), Constants.NT_QUERY);
NodeImpl queryNode =
(NodeImpl) session.getTransientNodesManager().update(ItemState.createAddedState(queryData), false);
NodeTypeDataManager ntmanager = session.getWorkspace().getNodeTypesHolder();
PlainChangesLog changes =
ntmanager.makeAutoCreatedItems((NodeData) queryNode.getData(), Constants.NT_QUERY, session
.getTransientNodesManager(), session.getUserID());
for (ItemState autoCreatedState : changes.getAllStates())
{
session.getTransientNodesManager().update(autoCreatedState, false);
}
// queryNode.addAutoCreatedItems(Constants.NT_QUERY);
// set properties
TransientValueData value = new TransientValueData(language);
TransientPropertyData jcrLanguage =
TransientPropertyData.createPropertyData(queryData, Constants.JCR_LANGUAGE, PropertyType.STRING, false,
value);
session.getTransientNodesManager().update(ItemState.createAddedState(jcrLanguage), false);
value = new TransientValueData(statement);
TransientPropertyData jcrStatement =
TransientPropertyData.createPropertyData(queryData, Constants.JCR_STATEMENT, PropertyType.STRING, false,
value);
session.getTransientNodesManager().update(ItemState.createAddedState(jcrStatement), false);
// NOTE: for save stored node need save() on parent or on session (6.6.10
// The Query Object)
node = queryNode;
return node;
}
/**
* Sets the maximum size of the result set.
*
* @param limit new maximum size of the result set
*/
public void setLimit(long limit)
{
this.limit = limit;
}
/**
* Sets the start offset of the result set.
*
* @param offset new start offset of the result set
*/
public void setOffset(long offset)
{
this.offset = offset;
}
// -----------------------------< internal >---------------------------------
/**
* Sets the initialized flag.
*/
protected void setInitialized()
{
initialized = true;
}
/**
* Checks if this query is not yet initialized and throws an
* <code>IllegalStateException</code> if it is already initialized.
*/
protected void checkNotInitialized()
{
if (initialized)
{
throw new IllegalStateException("already initialized");
}
}
/**
* Checks if this query is initialized and throws an
* <code>IllegalStateException</code> if it is not yet initialized.
*/
protected void checkInitialized()
{
if (!initialized)
{
throw new IllegalStateException("not initialized");
}
}
}