src/main/org/apache/tools/ant/taskdefs/AntlibDefinition.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Ant" and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
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 *
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.tools.ant.taskdefs;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ProjectHelper;
import org.apache.tools.ant.Task;

/**
 * Base class for tasks that that can be used in antlibs.
 * For handling uri and class loading.
 *
 * @author Peter Reilly
 *
 * @since Ant 1.6
 */
public class AntlibDefinition extends Task {

    private String uri = "";
    private ClassLoader antlibClassLoader;

    /**
     * The URI for this definition.
     * If the URI is "antlib:org.apache.tools.ant",
     * (this is the default uri)
     * the uri will be set to "".
     * URIs that start with "ant:" are reserved
     * and are not allowed in this context.
     * @param uri the namespace URI
     * @throws BuildException if a reserved URI is used
     */
    public void setURI(String uri) throws BuildException {
        if (uri.equals(ProjectHelper.ANT_CORE_URI)) {
            uri = "";
        }
        if (uri.startsWith("ant:")) {
            throw new BuildException("Attempt to use a reserved URI " + uri);
        }
        this.uri = uri;
    }

    /**
     * The URI for this definition.
     * @return The URI for this defintion.
     */
    public String getURI() {
        return uri;
    }

    /**
     * Set the class loader of the loading object
     *
     * @param classLoader a <code>ClassLoader</code> value
     */
    public void setAntlibClassLoader(ClassLoader classLoader) {
        this.antlibClassLoader = classLoader;
    }

    /**
     * The current antlib classloader
     * @return the antlib classloader for the definition, this
     *         is null if the definition is not used in an antlib.
     */
    public ClassLoader getAntlibClassLoader() {
        return antlibClassLoader;
    }
}