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/*****************************************************************
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
| $Id: AtomUtils.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.util.Iterator;
import java.util.List;
public class AtomUtils {
public static Atom findAtom(AtomParent parent, String path) {
Atom atom = null;
while (path != null) {
int separator = path.indexOf('/');
String atomName;
int index = 0;
if (separator > 0) {
atomName = path.substring(0, separator);
path = path.substring(separator+1);
} else {
atomName = path;
path = null;
}
if (atomName.length() != 4) {
// we need at least 3 more chars
if (atomName.length() < 7) return null;
// parse the name trailer
if (atomName.charAt(4) != '[' || atomName.charAt(atomName.length()-1) != ']') {
return null;
}
String indexString = atomName.substring(5, atomName.length()-1);
index = Integer.parseInt(indexString);
}
int type = Atom.nameToType(atomName);
atom = parent.getChild(type, index);
if (path == null) return atom;
if (atom instanceof AtomParent) {
parent = (AtomParent)atom;
} else {
return null;
}
}
return atom;
}
public static Atom findChild(List atoms, int type, int index) {
for (Iterator i = atoms.iterator(); i.hasNext();) {
Atom atom = (Atom)i.next();
if (atom.getType() == type) {
if (index-- == 0) return atom;
}
}
return null;
}
}
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