org.objectstyle.cayenne.access.DataDomainFlattenedBucket Maven / Gradle / Ivy

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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.access;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.objectstyle.cayenne.map.DbEntity;
import org.objectstyle.cayenne.query.DeleteBatchQuery;
import org.objectstyle.cayenne.query.InsertBatchQuery;

/**
 * A sync bucket that holds flattened queries.
 * 
 * @since 1.2
 * @author Andrus Adamchik
 */
class DataDomainFlattenedBucket {

    final DataDomainFlushAction parent;
    final Map flattenedInsertQueries;
    final Map flattenedDeleteQueries;

    DataDomainFlattenedBucket(DataDomainFlushAction parent) {
        this.parent = parent;
        this.flattenedInsertQueries = new HashMap();
        this.flattenedDeleteQueries = new HashMap();
    }

    boolean isEmpty() {
        return flattenedInsertQueries.isEmpty() && flattenedDeleteQueries.isEmpty();
    }

    void addFlattenedInsert(DbEntity flattenedEntity, FlattenedArcKey flattenedInsertInfo) {

        InsertBatchQuery relationInsertQuery = (InsertBatchQuery) flattenedInsertQueries
                .get(flattenedEntity);

        if (relationInsertQuery == null) {
            relationInsertQuery = new InsertBatchQuery(flattenedEntity, 50);
            flattenedInsertQueries.put(flattenedEntity, relationInsertQuery);
        }

        DataNode node = parent.getDomain().lookupDataNode(flattenedEntity.getDataMap());
        Map flattenedSnapshot = flattenedInsertInfo.buildJoinSnapshotForInsert(node);
        relationInsertQuery.add(flattenedSnapshot);
    }

    void addFlattenedDelete(DbEntity flattenedEntity, FlattenedArcKey flattenedDeleteInfo) {

        DeleteBatchQuery relationDeleteQuery = (DeleteBatchQuery) flattenedDeleteQueries
                .get(flattenedEntity);
        if (relationDeleteQuery == null) {
            boolean optimisticLocking = false;
            relationDeleteQuery = new DeleteBatchQuery(flattenedEntity, 50);
            relationDeleteQuery.setUsingOptimisticLocking(optimisticLocking);
            flattenedDeleteQueries.put(flattenedEntity, relationDeleteQuery);
        }

        DataNode node = parent.getDomain().lookupDataNode(flattenedEntity.getDataMap());
        List flattenedSnapshots = flattenedDeleteInfo.buildJoinSnapshotsForDelete(node);
        if (!flattenedSnapshots.isEmpty()) {
            Iterator snapsIt = flattenedSnapshots.iterator();
            while (snapsIt.hasNext()) {
                relationDeleteQuery.add((Map) snapsIt.next());
            }
        }
    }

    void appendInserts(Collection queries) {
        if (!flattenedInsertQueries.isEmpty()) {
            queries.addAll(flattenedInsertQueries.values());
        }
    }

    void appendDeletes(Collection queries) {
        if (!flattenedDeleteQueries.isEmpty()) {
            queries.addAll(flattenedDeleteQueries.values());
        }
    }
}