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/*
 *  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.helper;


import org.apache.tools.ant.Project;
import org.apache.tools.ant.Executor;
import org.apache.tools.ant.BuildException;


/**
 * "Single-check" Target executor implementation.
 * Differs from {@link DefaultExecutor} in that the dependencies for all
 * targets are computed together, so that shared dependencies are run just once.
 * @since Ant 1.6.3
 */
public class SingleCheckExecutor implements Executor {

    /** {@inheritDoc}. */
    public void executeTargets(Project project, String[] targetNames)
        throws BuildException {
            project.executeSortedTargets(
                project.topoSort(targetNames, project.getTargets(), false));
    }

    /** {@inheritDoc}. */
    public Executor getSubProjectExecutor() {
        return this;
    }

}