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/*
* Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.tools.javac.api;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import javax.tools.*;
import javax.tools.JavaFileObject.Kind;
/**
* Wraps all calls to a given file manager. Subclasses of this class
* might override some of these methods and might also provide
* additional fields and methods.
*
* This class might be moved to {@link javax.tools} in a future
* release.
*
*
This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own
* risk. This code and its internal interfaces are subject to change
* or deletion without notice.
*
* @param the type of file manager wrapped to by this object
*
* @author Peter von der Ahé
* @since 1.6
*/
public class WrappingJavaFileManager extends ForwardingJavaFileManager {
/**
* Creates a new instance of WrappingJavaFileManager.
* @param fileManager file manager to be wrapped
*/
protected WrappingJavaFileManager(M fileManager) {
super(fileManager);
}
/**
* This implementation returns the given file object. Subclasses
* may override this behavior.
*
* @param fileObject a file object
*/
protected FileObject wrap(FileObject fileObject) {
return fileObject;
}
/**
* This implementation forwards to {@link #wrap(FileObject)}.
* Subclasses may override this behavior.
*
* @param fileObject a file object
* @throws ClassCastException if the file object returned from the
* forwarded call is not a subtype of {@linkplain JavaFileObject}
*/
protected JavaFileObject wrap(JavaFileObject fileObject) {
return (JavaFileObject)wrap((FileObject)fileObject);
}
/**
* This implementation returns the given file object. Subclasses
* may override this behavior.
*
* @param fileObject a file object
*/
protected FileObject unwrap(FileObject fileObject) {
return fileObject;
}
/**
* This implementation forwards to {@link #unwrap(FileObject)}.
* Subclasses may override this behavior.
*
* @param fileObject a file object
* @throws ClassCastException if the file object returned from the
* forwarded call is not a subtype of {@linkplain JavaFileObject}
*/
protected JavaFileObject unwrap(JavaFileObject fileObject) {
return (JavaFileObject)unwrap((FileObject)fileObject);
}
/**
* This implementation maps the given list of file objects by
* calling wrap on each. Subclasses may override this behavior.
*
* @param fileObjects a list of file objects
* @return the mapping
*/
protected Iterable wrap(Iterable fileObjects) {
List mapped = new ArrayList();
for (JavaFileObject fileObject : fileObjects)
mapped.add(wrap(fileObject));
return Collections.unmodifiableList(mapped);
}
/**
* This implementation returns the given URI. Subclasses may
* override this behavior.
*
* @param uri a URI
*/
protected URI unwrap(URI uri) {
return uri;
}
/**
* @throws IllegalStateException {@inheritDoc}
*/
public Iterable list(Location location,
String packageName,
Set kinds,
boolean recurse)
throws IOException
{
return wrap(super.list(location, packageName, kinds, recurse));
}
/**
* @throws IllegalStateException {@inheritDoc}
*/
public String inferBinaryName(Location location, JavaFileObject file) {
return super.inferBinaryName(location, unwrap(file));
}
/**
* @throws IllegalArgumentException {@inheritDoc}
* @throws UnsupportedOperationException {@inheritDoc}
* @throws IllegalStateException {@inheritDoc}
*/
public JavaFileObject getJavaFileForInput(Location location,
String className,
Kind kind)
throws IOException
{
return wrap(super.getJavaFileForInput(location, className, kind));
}
/**
* @throws IllegalArgumentException {@inheritDoc}
* @throws UnsupportedOperationException {@inheritDoc}
* @throws IllegalStateException {@inheritDoc}
*/
public JavaFileObject getJavaFileForOutput(Location location,
String className,
Kind kind,
FileObject sibling)
throws IOException
{
return wrap(super.getJavaFileForOutput(location, className, kind, unwrap(sibling)));
}
/**
* @throws IllegalArgumentException {@inheritDoc}
* @throws IllegalStateException {@inheritDoc}
*/
public FileObject getFileForInput(Location location,
String packageName,
String relativeName)
throws IOException
{
return wrap(super.getFileForInput(location, packageName, relativeName));
}
/**
* @throws IllegalArgumentException {@inheritDoc}
* @throws IllegalStateException {@inheritDoc}
*/
public FileObject getFileForOutput(Location location,
String packageName,
String relativeName,
FileObject sibling)
throws IOException
{
return wrap(super.getFileForOutput(location,
packageName,
relativeName,
unwrap(sibling)));
}
}