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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
 * limitations under the License.
 */
package org.apache.jackrabbit.rmi.client;

import java.rmi.RemoteException;
import java.util.Calendar;

import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.version.Version;
import javax.jcr.version.VersionHistory;

import org.apache.jackrabbit.rmi.remote.RemoteVersion;

/**
 * Local adapter for the JCR-RMI
 * {@link org.apache.jackrabbit.rmi.remote.RemoteVersion RemoteVersion}
 * interface. This class makes a remote version locally available using
 * the JCR {@link javax.jcr.version.Version Version} interface.
 *
 * @see javax.jcr.version.Version
 * @see org.apache.jackrabbit.rmi.remote.RemoteVersion
 */
public class ClientVersion extends ClientNode implements Version {

    /** The adapted remote version. */
    private RemoteVersion remote;

    /**
     * Creates a local adapter for the given remote version.
     *
     * @param session current session
     * @param remote  remote version
     * @param factory local adapter factory
     */
    public ClientVersion(Session session, RemoteVersion remote,
        LocalAdapterFactory factory) {
        super(session, remote, factory);
        this.remote = remote;
    }

    /**
     * Utility method for creating a version array for an array
     * of remote versions. The versions in the returned array
     * are created using the local adapter factory.
     * 

* A null input is treated as an empty array. * * @param remotes remote versions * @return local version array */ private Version[] getVersionArray(RemoteVersion[] remotes) { if (remotes != null) { Version[] versions = new Version[remotes.length]; for (int i = 0; i < remotes.length; i++) { versions[i] = getFactory().getVersion(getSession(), remotes[i]); } return versions; } else { return new Version[0]; // for safety } } /** {@inheritDoc} */ public Calendar getCreated() throws RepositoryException { try { return remote.getCreated(); } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } /** {@inheritDoc} */ public Version[] getSuccessors() throws RepositoryException { try { return getVersionArray(remote.getSuccessors()); } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } /** {@inheritDoc} */ public Version[] getPredecessors() throws RepositoryException { try { return getVersionArray(remote.getPredecessors()); } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } /** {@inheritDoc} */ public VersionHistory getContainingHistory() throws RepositoryException { try { return getFactory().getVersionHistory(getSession(), remote.getContainingHistory()); } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } /** {@inheritDoc} */ public Node getFrozenNode() throws RepositoryException { try { return getFactory().getNode(getSession(), remote.getFrozenNode()); } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } /** {@inheritDoc} */ public Version getLinearPredecessor() throws RepositoryException { try { RemoteVersion linearPredecessor = remote.getLinearPredecessor(); if (linearPredecessor == null) { return null; } else { return getFactory().getVersion(getSession(), linearPredecessor); } } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } /** {@inheritDoc} */ public Version getLinearSuccessor() throws RepositoryException { try { RemoteVersion linearSuccessor = remote.getLinearSuccessor(); if (linearSuccessor == null) { return null; } else { return getFactory().getVersion(getSession(), linearSuccessor); } } catch (RemoteException ex) { throw new RemoteRepositoryException(ex); } } }





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