/*

  * 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.commons.launcher.types;

 import java.io.File;

 import org.apache.tools.ant.ProjectHelper;

 import org.apache.tools.ant.types.Commandline;

 import org.apache.tools.ant.types.DataType;

 import org.apache.tools.ant.types.Path;

 /**

  * A class that represents nested <arg> or <jvmarg> elements. This class

  * provides the same functionality as the class that represents these same

  * elements in a "java" task. In addition, this class supports conditional "if"

  * and "unless" attributes.

  *

  * @author Patrick Luby

  */

 public class ConditionalArgument extends DataType {

     //------------------------------------------------------------------ Fields

     /**

      * Cached "if" condition flag.

      */

     private String ifCondition = null;

     /**

      * Cached "unless" condition flag.

      */

     private String unlessCondition = null;

     /**

      * Cached command line arguments.

      */

     private String[] parts = null;

     //----------------------------------------------------------------- Methods

     /**

      * Get the "if" condition flag.

      *

      * @return the "if" condition flag

      */

     public String getIf() {

         return ProjectHelper.replaceProperties(project, ifCondition, project.getProperties());

     }

     /**

      * Get a single command line argument.

      *

      * @return a single command line argument

      */

     public String[] getParts() {

         String[] list = new String[parts.length];

         for (int i = 0; i < parts.length; i++)

             list[i] = ProjectHelper.replaceProperties(project, parts[i], project.getProperties());

         return list;

     }

     /**

      * Get the "unless" condition flag.

      *

      * @return the "unless" condition flag

      */

     public String getUnless() {

         return ProjectHelper.replaceProperties(project, unlessCondition, project.getProperties());

     }

     /**

      * Set a single command line argument to the absolute

      * filename of the specified file.

      *

      * @param file a single command line argument

      */

     public void setFile(File file) {

         this.parts = new String[]{ file.getAbsolutePath() };

     }

     /**

      * Set the "if" condition. Tasks that nest this class as an element

      * should evaluate this flag in their {@link org.apache.tools.ant.Task#execute()} method. If the

      * following conditions are true, the task should process this element:

      * <ul>

      * <ol>The flag is neither null nor a empty string

      * <ol>The property that the flag resolves to after macro substitution

      *  is defined

      * </ul>

      *

      * @param property a property name or macro

      */

     public void setIf(String property) {

         this.ifCondition = property;

     }

     /**

      * Set a line to split into several command line arguments.

      *

      * @param line line to split into several commandline arguments

      */

     public void setLine(String line) {

         parts = Commandline.translateCommandline(line);

     }

     /**

      * Set a single command line argument and treat it like a path. The

      * correct path separator for the platform is used.

      *

      * @param path a single command line argument

      */

     public void setPath(Path path) {

         this.parts = new String[]{ path.toString() };

     }

     /**

      * Set the "unless" condition. Tasks that nest this class as an element

      * should evaluate this flag in their {@link org.apache.tools.ant.Task#execute()} method. If the

      * following conditions are true, the task should ignore this element:

      * <ul>

      * <ol>The flag is neither null nor a empty string

      * <ol>The property that the flag resolves to after macro substitution

      *  is defined

      * </ul>

      *

      * @param property a property name or macro

      */

     public void setUnless(String property) {

         this.unlessCondition = property;

     }

     /**

      * Set a single command line argument.

      *

      * @param value a single command line argument

      */

     public void setValue(String value) {

         this.parts = new String[]{ value };

     }

 }