/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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 org.apache.giraph.block_app.framework.block;

 import java.util.Arrays;

 import java.util.Iterator;

 import java.util.List;

 import org.apache.giraph.block_app.framework.piece.AbstractPiece;

 import org.apache.giraph.function.Consumer;

 import com.google.common.collect.Iterables;

 /**

  * Block that executes provided blocks sequentially.

  */

 @SuppressWarnings("rawtypes")

 public final class SequenceBlock implements Block {

   private final Block[] blocks;

   public SequenceBlock(Block... blocks) {

     this.blocks = blocks.clone();

   }

   public SequenceBlock(List<? extends Block> blocks) {

     this.blocks = blocks.toArray(new Block[blocks.size()]);

   }

   @Override

   public Iterator<AbstractPiece> iterator() {

     return Iterables.concat(Arrays.asList(blocks)).iterator();

   }

   @Override

   public void forAllPossiblePieces(Consumer<AbstractPiece> consumer) {

     for (Block block : blocks) {

       block.forAllPossiblePieces(consumer);

     }

   }

   @Override

   public PieceCount getPieceCount() {

     PieceCount ret = new PieceCount(0);

     for (Block block : blocks) {

       ret.add(block.getPieceCount());

     }

     return ret;

   }

   @Override

   public String toString() {

     return "SequenceBlock" + Arrays.toString(blocks);

   }

 }