proposal/mutant/src/java/common/org/apache/ant/common/antlib/ExecutionComponent.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 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 "The Jakarta Project", "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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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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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.ant.common.antlib;
import org.apache.ant.common.util.ExecutionException;

/**
 * An execution component is a component from an AntLibrary which is used in
 * the execution of an Ant build. A component can have a context.
 *
 * @author <a href="mailto:conor@apache.org">Conor MacNeill</a>
 * @created 1 February 2002
 */
public interface ExecutionComponent {
    /**
     * Initialise the task. The task may use the AntContext to request
     * services from the Ant core.
     *
     * @param context the Task's context
     * @param componentType the type of the component
     * @exception ExecutionException if the component cannot be initialised
     */
    void init(AntContext context, String componentType)
         throws ExecutionException;

    /**
     * Validate the component. This is called after the element has been
     * configured from its build model. The element may perform validation
     * of its configuration
     *
     * @exception ExecutionException if the component is not validly
     *      configured
     */
    void validateComponent() throws ExecutionException;

    /**
     * Get the AntContext associated with this component
     *
     * @return the component's context
     */
    AntContext getAntContext();

    /**
     * Get the type of the component in the build file
     *
     * @return the type of the component
     */
    String getComponentType();
}