/*

  * Copyright 2004-2008 the Seasar Foundation and the Others.

  *

  * Licensed 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.seasar.eclipse.common.variable;

 import java.io.File;

 import java.io.IOException;

 import java.net.URL;

 import org.eclipse.core.runtime.FileLocator;

 import org.eclipse.core.runtime.Path;

 import org.eclipse.jdt.core.ClasspathVariableInitializer;

 import org.eclipse.jdt.core.JavaCore;

 import org.eclipse.jdt.core.JavaModelException;

 /**

  * @author taichi

  * 

  */

 public abstract class AbstractVariable extends ClasspathVariableInitializer {

         /**

          * 

          */

         public AbstractVariable() {

                 super();

         }

         /*

          * (non-Javadoc)

          * 

          * @see org.eclipse.jdt.core.ClasspathVariableInitializer#initialize(java.lang.String)

          */

         @Override

     public void initialize(String variable) {

                 URL installLocation = getInstallLocation();

                 URL local = null;

                 try {

                         local = FileLocator.toFileURL(installLocation);

                 } catch (IOException e) {

                         JavaCore.removeClasspathVariable(variable, null);

                         return;

                 }

                 try {

                         String fullPath = new File(local.getPath()).getAbsolutePath();

                         JavaCore.setClasspathVariable(variable,

                                         Path.fromOSString(fullPath), null);

                 } catch (JavaModelException e1) {

                         JavaCore.removeClasspathVariable(variable, null);

                 }

         }

         protected abstract URL getInstallLocation();

 }