diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/SparseArrayElementAddTransform.java')
-rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/SparseArrayElementAddTransform.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/SparseArrayElementAddTransform.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/SparseArrayElementAddTransform.java new file mode 100644 index 000000000..b7547bc9a --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/SparseArrayElementAddTransform.java @@ -0,0 +1,77 @@ +/* + * 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.ide.eclipse.gltrace.state.transforms; + +import com.android.ide.eclipse.gltrace.state.GLSparseArrayProperty; +import com.android.ide.eclipse.gltrace.state.IGLProperty; + +/** + * A {@link SparseArrayElementAddTransform} changes given state by adding an + * element to a sparse array, if there is no item with the same key already. + */ +public class SparseArrayElementAddTransform implements IStateTransform { + private IGLPropertyAccessor mAccessor; + private int mKey; + private IGLProperty mOldValue; + + public SparseArrayElementAddTransform(IGLPropertyAccessor accessor, int key) { + mAccessor = accessor; + mKey = key; + } + + @Override + public void apply(IGLProperty currentState) { + GLSparseArrayProperty propertyArray = getArray(currentState); + if (propertyArray != null) { + mOldValue = propertyArray.getProperty(mKey); + if (mOldValue == null) { + // add only if there is no item with this key already present + propertyArray.add(mKey); + } + } + } + + @Override + public void revert(IGLProperty currentState) { + GLSparseArrayProperty propertyArray = getArray(currentState); + if (propertyArray != null) { + if (mOldValue == null) { + // delete only if we actually added this key + propertyArray.delete(mKey); + } + } + } + + @Override + public IGLProperty getChangedProperty(IGLProperty currentState) { + return getArray(currentState); + } + + private GLSparseArrayProperty getArray(IGLProperty state) { + IGLProperty p = state; + + if (mAccessor != null) { + p = mAccessor.getProperty(p); + } + + if (p instanceof GLSparseArrayProperty) { + return (GLSparseArrayProperty) p; + } else { + return null; + } + } +} |