/* 
 * 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.parquet.io;

import static org.junit.Assert.assertEquals;

import java.util.Deque;

import org.apache.parquet.io.api.Binary;
import org.apache.parquet.io.api.RecordConsumer;

final public class ExpectationValidatingRecordConsumer extends
    RecordConsumer {
  private final Deque<String> expectations;
  int count = 0;

  public ExpectationValidatingRecordConsumer(Deque<String> expectations) {
    this.expectations = expectations;
  }

  private void validate(String got) {
//    System.out.println("  \"" + got + "\";");
    assertEquals("event #"+count, expectations.pop(), got);
    ++count;
  }

  @Override
  public void startMessage() {
    validate("startMessage()");
  }

  @Override
  public void startGroup() {
    validate("startGroup()");
  }

  @Override
  public void startField(String field, int index) {
    validate("startField("+field+", "+index+")");
  }

  @Override
  public void endMessage() {
    validate("endMessage()");
  }

  @Override
  public void endGroup() {
    validate("endGroup()");
  }

  @Override
  public void endField(String field, int index) {
    validate("endField("+field+", "+index+")");
  }

  @Override
  public void addInteger(int value) {
    validate("addInt("+value+")");
  }

  @Override
  public void addLong(long value) {
    validate("addLong("+value+")");
  }

  @Override
  public void addBoolean(boolean value) {
    validate("addBoolean("+value+")");
  }

  @Override
  public void addBinary(Binary value) {
    validate("addBinary("+value.toStringUsingUTF8()+")");
  }

  @Override
  public void addFloat(float value) {
    validate("addFloat("+value+")");
  }

  @Override
  public void addDouble(double value) {
    validate("addDouble("+value+")");
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void flush() {
    validate("flush()");
  }

}