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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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 com.android.ide.eclipse.adt.internal.editors.binaryxml;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.core.runtime.content.IContentDescriber;
import org.eclipse.core.runtime.content.IContentDescription;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* A content describer for Android binary xml files
*
* <p>
* This class referenced by the "describer" configuration element in
* extensions to the <code>org.eclipse.core.runtime.contentTypes</code>
* extension point.
* </p>
*
* References :
* <a>http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;
* f=include/utils/ResourceTypes.h</a>
*
*/
public class BinaryXMLDescriber implements IContentDescriber {
private static final int RES_XML_HEADER_SIZE = 8;
private final static short RES_XML_TYPE = 0x0003;
/*
* (non-Javadoc)
* @see org.eclipse.core.runtime.content.IContentDescriber#describe(java.io.
* InputStream, org.eclipse.core.runtime.content.IContentDescription)
*/
@Override
public int describe(InputStream contents, IContentDescription description) throws IOException {
int status = INVALID;
int length = 8;
byte[] bytes = new byte[length];
if (contents.read(bytes, 0, length) == length) {
ByteBuffer buf = ByteBuffer.wrap(bytes);
buf.order(ByteOrder.LITTLE_ENDIAN);
short type = buf.getShort();
short headerSize = buf.getShort();
int size = buf.getInt(); // chunk size
if (type == RES_XML_TYPE && headerSize == RES_XML_HEADER_SIZE) {
status = VALID;
}
}
return status;
}
/*
* (non-Javadoc)
* @see
* org.eclipse.core.runtime.content.IContentDescriber#getSupportedOptions()
*/
@Override
public QualifiedName[] getSupportedOptions() {
return new QualifiedName[0];
}
}
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