76 lines
2.2 KiB
Java
76 lines
2.2 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content;
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/**
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* Representation of an owner of {@link UndoOperation} objects in an {@link UndoManager}.
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*
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* @hide
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*/
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public class UndoOwner {
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final String mTag;
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final UndoManager mManager;
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Object mData;
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int mOpCount;
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// For saving/restoring state.
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int mStateSeq;
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int mSavedIdx;
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UndoOwner(String tag, UndoManager manager) {
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if (tag == null) {
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throw new NullPointerException("tag can't be null");
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}
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if (manager == null) {
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throw new NullPointerException("manager can't be null");
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}
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mTag = tag;
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mManager = manager;
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}
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/**
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* Return the unique tag name identifying this owner. This is the tag
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* supplied to {@link UndoManager#getOwner(String, Object) UndoManager.getOwner}
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* and is immutable.
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*/
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public String getTag() {
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return mTag;
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}
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/**
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* Return the actual data object of the owner. This is the data object
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* supplied to {@link UndoManager#getOwner(String, Object) UndoManager.getOwner}. An
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* owner may have a null data if it was restored from a previously saved state with
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* no getOwner call to associate it with its data.
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*/
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public Object getData() {
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return mData;
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}
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@Override
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public String toString() {
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return "UndoOwner:[mTag=" + mTag +
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" mManager=" + mManager +
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" mData=" + mData +
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" mData=" + mData +
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" mOpCount=" + mOpCount +
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" mStateSeq=" + mStateSeq +
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" mSavedIdx=" + mSavedIdx + "]";
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}
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}
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