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/*****************************************************************
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
| $Id: ContainerAtom.java 196 2008-10-14 22:59:31Z bok $
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL 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 for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
package com.axiosys.bento4;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;
public class ContainerAtom extends Atom implements AtomParent {
protected final ArrayList children = new ArrayList();
public ContainerAtom(int type, int size, boolean isFull, RandomAccessFile source) throws IOException {
super(type, size, isFull, source);
}
public ContainerAtom(int type, int size, boolean isFull, RandomAccessFile source, AtomFactory atomFactory) throws IOException, InvalidFormatException {
super(type, size, isFull, source);
readChildren(atomFactory, source, getPayloadSize());
}
public Atom findAtom(String path) {
return AtomUtils.findAtom(this, path);
}
protected void writeFields(DataOutputStream stream) throws IOException {
writeChildren(stream);
}
protected void readChildren(AtomFactory atomFactory, RandomAccessFile source, int size) throws IOException, InvalidFormatException {
int[] bytesAvailable = new int[] { size };
Atom atom;
// save and switch the context
int savedContext = atomFactory.getContext();
atomFactory.setContext(type);
do {
atom = atomFactory.createAtom(source, bytesAvailable);
if (atom != null) children.add(atom);
} while (atom != null);
// restore the saved context
atomFactory.setContext(savedContext);
}
protected void writeChildren(DataOutputStream stream) throws IOException {
for (int i=0; i<children.size(); i++) {
Atom atom = (Atom)children.get(i);
atom.write(stream);
}
}
public int getChildrenCount() {
return children.size();
}
public Atom getChild(int index) {
return (Atom)children.get(index);
}
public Atom getChild(int type, int index) {
return AtomUtils.findChild(children, type, index);
}
public String toString(String indentation) {
StringBuffer result = new StringBuffer();
result.append(super.toString(indentation));
for (int i=0; i<children.size(); i++) {
result.append("\n");
result.append(((Atom)children.get(i)).toString(indentation+" "));
}
return result.toString();
}
}
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