Ant example source code file (ProjectComponent.java)

This example Ant source code file (ProjectComponent.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

cloneable, clonenotsupportedexception, location, location, object, project, project, projectcomponent, projectcomponent, string, string

The ProjectComponent.java source code

/*
 *  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.tools.ant;


/**
 * Base class for components of a project, including tasks and data types.
 * Provides common facilities.
 *
 */
public abstract class ProjectComponent implements Cloneable {

    // CheckStyle:VisibilityModifier OFF - bc
    /**
     * Project object of this component.
     * @deprecated since 1.6.x.
     *             You should not be directly accessing this variable directly.
     *             You should access project object via the getProject()
     *             or setProject() accessor/mutators.
     */
    protected Project project;

    /**
     * Location within the build file of this task definition.
     * @deprecated since 1.6.x.
     *             You should not be accessing this variable directly.
     *             Please use the {@link #getLocation()} method.
     */
    protected Location location = Location.UNKNOWN_LOCATION;

    /**
     * Description of this component, if any.
     * @deprecated since 1.6.x.
     *             You should not be accessing this variable directly.
     */
    protected String description;
    // CheckStyle:VisibilityModifier ON

    /** Sole constructor. */
    public ProjectComponent() {
    }

    /**
     * Sets the project object of this component. This method is used by
     * Project when a component is added to it so that the component has
     * access to the functions of the project. It should not be used
     * for any other purpose.
     *
     * @param project Project in whose scope this component belongs.
     *                Must not be <code>null.
     */
    public void setProject(Project project) {
        this.project = project;
    }

    /**
     * Returns the project to which this component belongs.
     *
     * @return the components's project.
     */
    public Project getProject() {
        return project;
    }

    /**
     * Returns the file/location where this task was defined.
     *
     * @return the file/location where this task was defined.
     *         Should not return <code>null. Location.UNKNOWN_LOCATION
     *         is used for unknown locations.
     *
     * @see Location#UNKNOWN_LOCATION
     */
    public Location getLocation() {
        return location;
    }

    /**
     * Sets the file/location where this task was defined.
     *
     * @param location The file/location where this task was defined.
     *                 Should not be <code>null--use
     *                 Location.UNKNOWN_LOCATION if the location isn't known.
     *
     * @see Location#UNKNOWN_LOCATION
     */
    public void setLocation(Location location) {
        this.location = location;
    }

    /**
     * Sets a description of the current action. This may be used for logging
     * purposes.
     *
     * @param desc Description of the current action.
     *             May be <code>null, indicating that no description is
     *             available.
     *
     */
    public void setDescription(String desc) {
        description = desc;
    }

    /**
     * Returns the description of the current action.
     *
     * @return the description of the current action, or <code>null if
     *         no description is available.
     */
    public String getDescription() {
        return description;
    }

    /**
     * Logs a message with the default (INFO) priority.
     *
     * @param msg The message to be logged. Should not be <code>null.
     */
    public void log(String msg) {
        log(msg, Project.MSG_INFO);
    }

    /**
     * Logs a message with the given priority.
     *
     * @param msg The message to be logged. Should not be <code>null.
     * @param msgLevel the message priority at which this message is
     *                 to be logged.
     */
    public void log(String msg, int msgLevel) {
        if (getProject() != null) {
            getProject().log(msg, msgLevel);
        } else {
            // 'reasonable' default, if the component is used without
            // a Project ( for example as a standalone Bean ).
            // Most ant components can be used this way.
            if (msgLevel <= Project.MSG_INFO) {
                System.err.println(msg);
            }
        }
    }
    /**
     * @since Ant 1.7
     * @return a shallow copy of this projectcomponent.
     * @throws CloneNotSupportedException does not happen,
     *                                    but is declared to allow subclasses to do so.
     */
    public Object clone() throws CloneNotSupportedException {
        ProjectComponent pc = (ProjectComponent) super.clone();
        pc.setLocation(getLocation());
        pc.setProject(getProject());
        return pc;
    }
}