/*
 * Copyright  2000-2004 The Apache Software Foundation
 *
 *  Licensed 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.tools.ant.taskdefs;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.EnumeratedAttribute;
/**
 * Writes a message to the Ant logging facilities.
 *
 * @since Ant 1.1
 *
 * @ant.task category="utility"
 */
public class Notify extends Task {
    protected File lockDir = null;
    protected String name = "default";

    /**
     * Does the work.
     *
     * @exception BuildException if something goes wrong with the build
     */
    public void execute() throws BuildException {
		new File(lockDir, name+".lck").delete();
    }

    /**
     * Message to write.
     *
     * @param msg Sets the name for this lock... should be unique for this ant instance
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * Directory to put locks into
     * @param lockDir the file to write to, if not set, echo to
     *             standard output
     */
    public void setLockDir(File lockDir) {
        this.lockDir = lockDir;
    }

    /**
     * Ensure we have a consistent and legal set of attributes, and set
     * any internal flags necessary based on different combinations
     * of attributes.
     * @exception BuildException if an error occurs
     */
    protected void validateAttributes() throws BuildException {
        if (lockDir == null || !lockDir.exists()) {
            throw new BuildException("lockDir must be specified and must exist");
        }

		if (name == null || name.trim().equals("")) {
            throw new BuildException("a name must be provided");
		}
	}
}