1 files changed, 80 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/binaryxml/BinaryXMLDescriber.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/binaryxml/BinaryXMLDescriber.java
new file mode 100644
index 000000000..00bf7b0ac
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/binaryxml/BinaryXMLDescriber.java
@@ -0,0 +1,80 @@
+/*
+ * 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];
+    }
+
+}