1 files changed, 171 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/AbstractContainerBox.java b/isoparser/src/main/java/com/googlecode/mp4parser/AbstractContainerBox.java
new file mode 100644
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+++ b/isoparser/src/main/java/com/googlecode/mp4parser/AbstractContainerBox.java
@@ -0,0 +1,171 @@
+/*  
+ * Copyright 2008 CoreMedia AG, Hamburg
+ *
+ * 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 com.googlecode.mp4parser;
+
+import com.coremedia.iso.BoxParser;
+import com.coremedia.iso.boxes.Box;
+import com.coremedia.iso.boxes.ContainerBox;
+import com.googlecode.mp4parser.util.ByteBufferByteChannel;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.logging.Logger;
+
+
+/**
+ * Abstract base class suitable for most boxes acting purely as container for other boxes.
+ */
+public abstract class AbstractContainerBox extends AbstractBox implements ContainerBox {
+    private static Logger LOG = Logger.getLogger(AbstractContainerBox.class.getName());
+
+    protected List<Box> boxes = new LinkedList<Box>();
+    protected BoxParser boxParser;
+
+    @Override
+    protected long getContentSize() {
+        long contentSize = 0;
+        for (Box boxe : boxes) {
+            contentSize += boxe.getSize();
+        }
+        return contentSize;
+    }
+
+    public AbstractContainerBox(String type) {
+        super(type);
+    }
+
+    public List<Box> getBoxes() {
+        return Collections.unmodifiableList(boxes);
+    }
+
+    public void setBoxes(List<Box> boxes) {
+        this.boxes = new LinkedList<Box>(boxes);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T extends Box> List<T> getBoxes(Class<T> clazz) {
+        return getBoxes(clazz, false);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T extends Box> List<T> getBoxes(Class<T> clazz, boolean recursive) {
+        List<T> boxesToBeReturned = new ArrayList<T>(2);
+        for (Box boxe : boxes) {
+            //clazz.isInstance(boxe) / clazz == boxe.getClass()?
+            // I hereby finally decide to use isInstance
+
+            if (clazz.isInstance(boxe)) {
+                boxesToBeReturned.add((T) boxe);
+            }
+
+            if (recursive && boxe instanceof ContainerBox) {
+                boxesToBeReturned.addAll(((ContainerBox) boxe).getBoxes(clazz, recursive));
+            }
+        }
+        return boxesToBeReturned;
+    }
+
+    /**
+     * Add <code>b</code> to the container and sets the parent correctly.
+     *
+     * @param b will be added to the container
+     */
+    public void addBox(Box b) {
+        b.setParent(this);
+        boxes.add(b);
+    }
+
+    public void removeBox(Box b) {
+        b.setParent(this);
+        boxes.remove(b);
+    }
+
+    @Override
+    public void parse(ReadableByteChannel readableByteChannel, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException {
+        super.parse(readableByteChannel, header, contentSize, boxParser);
+        this.boxParser = boxParser;
+    }
+
+    @Override
+    public void _parseDetails(ByteBuffer content) {
+        parseChildBoxes(content);
+    }
+
+
+    public String toString() {
+        StringBuilder buffer = new StringBuilder();
+
+        buffer.append(this.getClass().getSimpleName()).append("[");
+        for (int i = 0; i < boxes.size(); i++) {
+            if (i > 0) {
+                buffer.append(";");
+            }
+            buffer.append(boxes.get(i).toString());
+        }
+        buffer.append("]");
+        return buffer.toString();
+    }
+
+    /**
+     * The number of bytes from box start (first length byte) to the
+     * first length byte of the first child box
+     *
+     * @return offset to first child box
+     */
+    public long getNumOfBytesToFirstChild() {
+        return 8;
+    }
+
+    @Override
+    protected void getContent(ByteBuffer byteBuffer) {
+        writeChildBoxes(byteBuffer);
+    }
+
+    protected final void parseChildBoxes(ByteBuffer content) {
+        try {
+            while (content.remaining() >= 8) { //  8 is the minimal size for a sane box
+                boxes.add(boxParser.parseBox(new ByteBufferByteChannel(content), this));
+            }
+
+            if (content.remaining() != 0) {
+                setDeadBytes(content.slice());
+                LOG.warning("Something's wrong with the sizes. There are dead bytes in a container box.");
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    protected final void writeChildBoxes(ByteBuffer bb) {
+        WritableByteChannel wbc = new ByteBufferByteChannel(bb);
+        for (Box box : boxes) {
+            try {
+                box.getBox(wbc);
+            } catch (IOException e) {
+                // My WritableByteChannel won't throw any excpetion
+                throw new RuntimeException("Cannot happen to me", e);
+            }
+        }
+    }
+
+}