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/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
* Not a contribution.
*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.android.camera.mpo;
import java.util.HashMap;
import java.util.Map;
/**
* This class stores all the tags in an MP Index IFD.
*/
public class MpoIfdData {
public static final int TYPE_MP_INDEX_IFD = 1;
public static final int TYPE_MP_ATTRIB_IFD = 2;
public static final byte[] MP_FORMAT_VER_VALUE = { 0x30, 0x31, 0x30, 0x30 };
private final int mIfdId;
private final Map<Short, MpoTag> mTags = new HashMap<Short, MpoTag>();
private int mOffsetToNextIfd = 0;
/**
* Creates an empty MpIndexIfdData
*/
public MpoIfdData(int ifdId) {
mIfdId = ifdId;
}
/**
* Get a array the contains all {@link MpoTag} in this IFD.
*/
protected MpoTag[] getAllTags() {
return mTags.values().toArray(new MpoTag[mTags.size()]);
}
/**
* Gets the {@link MpoTag} with given tag id. Return null if there is no
* such tag.
*/
protected MpoTag getTag(short tagId) {
return mTags.get(tagId);
}
/**
* Adds or replaces a {@link MpoTag}.
*/
protected MpoTag setTag(MpoTag tag) {
tag.setIfd(mIfdId);
return mTags.put(tag.getTagId(), tag);
}
protected boolean checkCollision(short tagId) {
return mTags.get(tagId) != null;
}
/**
* Removes the tag of the given ID
*/
protected void removeTag(short tagId) {
mTags.remove(tagId);
}
/**
* Gets the tags count in the IFD.
*/
protected int getTagCount() {
return mTags.size();
}
/**
* Sets the offset of next IFD.
*/
protected void setOffsetToNextIfd(int offset) {
mOffsetToNextIfd = offset;
}
/**
* Gets the offset of next IFD.
*/
protected int getOffsetToNextIfd() {
return mOffsetToNextIfd;
}
/**
* Returns true if all tags in this two IFDs are equal. Note that tags of
* IFD offset will be ignored.
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (obj instanceof MpoIfdData) {
MpoIfdData data = (MpoIfdData) obj;
if (data.getTagCount() == getTagCount()) {
MpoTag[] tags = data.getAllTags();
for (MpoTag tag : tags) {
MpoTag tag2 = mTags.get(tag.getTagId());
if (!tag.equals(tag2)) {
return false;
}
}
return true;
}
}
return false;
}
}
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