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1   /*
2    * Copyright 2004-2008 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.eclipse.common.variable;
17  
18  import java.io.File;
19  import java.io.IOException;
20  import java.net.URL;
21  
22  import org.eclipse.core.runtime.FileLocator;
23  import org.eclipse.core.runtime.Path;
24  import org.eclipse.jdt.core.ClasspathVariableInitializer;
25  import org.eclipse.jdt.core.JavaCore;
26  import org.eclipse.jdt.core.JavaModelException;
27  
28  /**
29   * @author taichi
30   * 
31   */
32  public abstract class AbstractVariable extends ClasspathVariableInitializer {
33  
34  	/**
35  	 * 
36  	 */
37  	public AbstractVariable() {
38  		super();
39  	}
40  
41  	/*
42  	 * (non-Javadoc)
43  	 * 
44  	 * @see org.eclipse.jdt.core.ClasspathVariableInitializer#initialize(java.lang.String)
45  	 */
46  	@Override
47      public void initialize(String variable) {
48  		URL installLocation = getInstallLocation();
49  		URL local = null;
50  		try {
51  			local = FileLocator.toFileURL(installLocation);
52  		} catch (IOException e) {
53  			JavaCore.removeClasspathVariable(variable, null);
54  			return;
55  		}
56  		try {
57  			String fullPath = new File(local.getPath()).getAbsolutePath();
58  			JavaCore.setClasspathVariable(variable,
59  					Path.fromOSString(fullPath), null);
60  		} catch (JavaModelException e1) {
61  			JavaCore.removeClasspathVariable(variable, null);
62  		}
63  
64  	}
65  
66  	protected abstract URL getInstallLocation();
67  }