/*
 * Copyright (C) 2017 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.observable.expressions.list;

import com.android.tools.idea.observable.collections.ObservableList;
import com.android.tools.idea.observable.expressions.integer.IntExpression;
import org.jetbrains.annotations.NotNull;

/**
 * An expression which returns the size of a list.
 */
public final class SizeExpression extends IntExpression {
  private final ObservableList<?> myList;

  public SizeExpression(@NotNull ObservableList<?> list) {
    super(list);
    myList = list;
  }

  @NotNull
  @Override
  public Integer get() {
    return myList.size();
  }
}
