/* 
 * 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.commons.exec.launcher;

import java.io.IOException;
import java.util.Map;

import org.apache.commons.exec.CommandLine;

/**
 * A command launcher that proxies another command launcher. Sub-classes
 * override exec(args, env, workdir)
 */
public abstract class CommandLauncherProxy extends CommandLauncherImpl {

    public CommandLauncherProxy(final CommandLauncher launcher) {
        myLauncher = launcher;
    }

    private CommandLauncher myLauncher;

    /**
     * Launches the given command in a new process. Delegates this method to the
     * proxied launcher
     * 
     * @param cmd
     *            the command line to execute as an array of strings
     * @param env
     *            the environment to set as an array of strings
     * @throws IOException
     *             forwarded from the exec method of the command launcher
     */
    public Process exec(final CommandLine cmd, final Map env)
            throws IOException {
        return myLauncher.exec(cmd, env);
    }
}

/* 
 * 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.commons.exec.launcher;

import java.io.IOException;
import java.util.Map;

import org.apache.commons.exec.CommandLine;

/**
 * A command launcher that proxies another command launcher. Sub-classes
 * override exec(args, env, workdir)
 */
public abstract class CommandLauncherProxy extends CommandLauncherImpl {

    public CommandLauncherProxy(final CommandLauncher launcher) {
        myLauncher = launcher;
    }

    private final CommandLauncher myLauncher;

    /**
     * Launches the given command in a new process. Delegates this method to the
     * proxied launcher
     * 
     * @param cmd
     *            the command line to execute as an array of strings
     * @param env
     *            the environment to set as an array of strings
     * @throws IOException
     *             forwarded from the exec method of the command launcher
     */
    public Process exec(final CommandLine cmd, final Map env)
            throws IOException {
        return myLauncher.exec(cmd, env);
    }
}

Make private field final for better thread safety