| /* |
| * Copyright (C) 2015 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.tools.idea.ui.properties.expressions.list; |
| |
| import com.android.tools.idea.ui.properties.collections.ObservableList; |
| import com.google.common.collect.Lists; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.List; |
| |
| /** |
| * An expression which maps one list to another. |
| */ |
| public abstract class AbstractMapExpression<S, D> extends ListExpression<S, D> { |
| private final ObservableList<? extends S> mySourceList; |
| |
| protected AbstractMapExpression(ObservableList<? extends S> sourceList) { |
| super(sourceList); |
| |
| mySourceList = sourceList; |
| } |
| |
| @NotNull |
| @Override |
| public final List<? extends D> get() { |
| List<D> mappedList = Lists.newArrayListWithCapacity(mySourceList.size()); |
| for (S srcElement : mySourceList) { |
| mappedList.add(transform(srcElement)); |
| } |
| return mappedList; |
| } |
| |
| @NotNull |
| protected abstract D transform(@NotNull S srcElement); |
| } |