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/* ====================================================================
*
* The ObjectStyle Group Software License, version 1.1
* ObjectStyle Group - http://objectstyle.org/
*
* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if any,
* must include the following acknowlegement:
* "This product includes software developed by independent contributors
* and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, email
* "andrus at objectstyle dot org".
*
* 5. Products derived from this software may not be called "ObjectStyle"
* or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
* names without prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals and hosted on ObjectStyle Group web site. For more
* information on the ObjectStyle Group, please see
* .
*/
package org.objectstyle.cayenne.remote;
import org.objectstyle.cayenne.map.DataMap;
import org.objectstyle.cayenne.map.DbEntity;
import org.objectstyle.cayenne.map.EntityResolver;
import org.objectstyle.cayenne.map.ObjEntity;
import org.objectstyle.cayenne.map.Procedure;
import org.objectstyle.cayenne.query.PrefetchTreeNode;
import org.objectstyle.cayenne.query.Query;
import org.objectstyle.cayenne.query.QueryMetadata;
import org.objectstyle.cayenne.query.QueryRouter;
import org.objectstyle.cayenne.query.SQLAction;
import org.objectstyle.cayenne.query.SQLActionVisitor;
/**
* A client wrapper for the incremental query that overrides the metadata to ensure that
* query result is cached on the server, so that subranges could be retrieved at a later
* time.
*
* @since 1.2
* @author Andrus Adamchik
*/
class IncrementalQuery implements Query {
private Query query;
private String cacheKey;
IncrementalQuery(Query query, String cacheKey) {
this.query = query;
this.cacheKey = cacheKey;
}
public QueryMetadata getMetaData(EntityResolver resolver) {
final QueryMetadata metadata = query.getMetaData(resolver);
// the way paginated queries work on the server is that they are never cached
// (IncrementalFaultList interception happens before cache interception). So
// overriding caching settings in the metadata will only affect
// ClientServerChannel behavior
return new QueryMetadata() {
public String getCacheKey() {
return cacheKey;
}
public String getCachePolicy() {
return metadata.getCachePolicy();
}
public DataMap getDataMap() {
return metadata.getDataMap();
}
public DbEntity getDbEntity() {
return metadata.getDbEntity();
}
public int getFetchLimit() {
return metadata.getFetchLimit();
}
public int getFetchStartIndex() {
return metadata.getFetchStartIndex();
}
public ObjEntity getObjEntity() {
return metadata.getObjEntity();
}
public int getPageSize() {
return metadata.getPageSize();
}
public PrefetchTreeNode getPrefetchTree() {
return metadata.getPrefetchTree();
}
public Procedure getProcedure() {
return metadata.getProcedure();
}
public boolean isFetchingDataRows() {
return metadata.isFetchingDataRows();
}
public boolean isRefreshingObjects() {
return metadata.isRefreshingObjects();
}
public boolean isResolvingInherited() {
return metadata.isResolvingInherited();
}
};
}
public void route(QueryRouter router, EntityResolver resolver, Query substitutedQuery) {
query.route(router, resolver, substitutedQuery);
}
public SQLAction createSQLAction(SQLActionVisitor visitor) {
return query.createSQLAction(visitor);
}
public String getName() {
return query.getName();
}
/**
* @deprecated since 1.2 as super is deprecated.
*/
public void setName(String name) {
this.query.setName(name);
}
/**
* @deprecated since 1.2 as super is deprecated.
*/
public Object getRoot() {
return query.getRoot();
}
/**
* @deprecated since 1.2 as super is deprecated.
*/
public void setRoot(Object root) {
query.setRoot(root);
}
}