Jackrabbit Version tweaking

VersionTweakTest

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 * 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
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package org.apache.jackrabbit.core.version;

import javax.jcr.Node;
import javax.jcr.Session;
import javax.jcr.version.Version;
import javax.jcr.version.VersionHistory;
import javax.jcr.version.VersionIterator;
import javax.jcr.version.VersionManager;

import org.apache.jackrabbit.JcrConstants;
import org.apache.jackrabbit.test.AbstractJCRTest;

public class VTest extends AbstractJCRTest {

    protected Session session;

    private VersionManager vm;

    private Node n;

    protected void setUp() throws Exception {
        super.setUp();
        session = getHelper().getReadWriteSession();
        vm = session.getWorkspace().getVersionManager();

        n = session.getRootNode().addNode(
                "versiontest-" + System.currentTimeMillis());
        n.addMixin(JcrConstants.MIX_VERSIONABLE);

        session.save();
    }

    protected void tearDown() throws Exception {
        if (session != null) {
            session.removeItem(n.getPath());
            session.save();
            session.logout();
            session = null;
        }
        super.tearDown();
    }

    public void testV() throws Exception {

        n.setProperty("vp", 1);
        session.save();
        vm.checkin(n.getPath());

        vm.checkout(n.getPath());
        n.setProperty("vp", 2);
        session.save();
        vm.checkin(n.getPath());

        printHist(n.getPath());
        tweakHist(n, true);

        System.out.println("after change ------");
        printHist(n.getPath());

    }

    private void printHist(String path) throws Exception {
        System.out.println("History for " + path);
        VersionHistory vh = vm.getVersionHistory(path);
        VersionIterator it = vh.getAllVersions();
        while (it.hasNext()) {
            Version version = it.nextVersion();
            Node fn = version.getFrozenNode();
            StringBuilder sb = new StringBuilder();
            sb.append(version.getName());
            sb.append(": ");

            if (fn.hasProperty("vp")) {
                sb.append("vp ");
                sb.append(fn.getProperty("vp").getLong());
            } else {
                sb.append(" no vp");
            }
            sb.append(" ");
            if (fn.hasProperty("v2")) {
                sb.append("v2 ");
                sb.append(fn.getProperty("v2").getLong());
            } else {
                sb.append(" no v2");
            }
            sb.append(" ");

            System.out.println(sb.toString());
        }
    }

    private void tweakHist(Node n, boolean deleteOldVersion) throws Exception {
        VersionHistory vh = vm.getVersionHistory(n.getPath());
        VersionIterator it = vh.getAllVersions();
        while (it.hasNext()) {
            Version version = it.nextVersion();
            if (version.getName()
                    .equalsIgnoreCase(JcrConstants.JCR_ROOTVERSION)) {
                // skipping root version
                continue;
            }
            vm.restore(version, true);
            session.refresh(false);

            vm.checkout(n.getPath());
            n.setProperty("vp", n.getProperty("vp").getLong() * 10);
            n.setProperty("v2", "1");
            session.save();
            vm.checkin(n.getPath());

            if (deleteOldVersion) {
                vh.removeVersion(version.getName());
            }
        }
    }
}