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/*
* Copyright 2002-2017 Drew Noakes
*
* 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.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.imaging.mp4;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.Metadata;
import com.drew.metadata.mp4.Mp4Directory;
import com.drew.metadata.mp4.boxes.Box;
import java.io.IOException;
/**
* @author Payton Garland
*/
public abstract class Mp4Handler<T extends Mp4Directory>
{
@NotNull protected Metadata metadata;
@NotNull protected T directory;
public Mp4Handler(@NotNull Metadata metadata)
{
this.metadata = metadata;
this.directory = getDirectory();
metadata.addDirectory(directory);
}
@NotNull
protected abstract T getDirectory();
protected abstract boolean shouldAcceptBox(@NotNull Box box);
protected abstract boolean shouldAcceptContainer(@NotNull Box box);
protected abstract Mp4Handler processBox(@NotNull Box box, @Nullable byte[] payload) throws IOException;
protected Mp4Handler processContainer(@NotNull Box box) throws IOException
{
return processBox(box, null);
}
public void addError(@NotNull String message)
{
directory.addError(message);
}
}
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