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/*
 * SonarQube, open source software quality management tool.
 * Copyright (C) 2008-2014 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * SonarQube is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * SonarQube is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.api.batch.sensor.measure.internal;

import com.google.common.base.Preconditions;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
import org.sonar.api.batch.fs.InputFile;
import org.sonar.api.batch.measure.Metric;
import org.sonar.api.batch.sensor.measure.Measure;

import javax.annotation.CheckForNull;

import java.io.Serializable;

public class DefaultMeasure implements Measure, Serializable {

  private final InputFile inputFile;
  private final Metric metric;
  private final G value;

  DefaultMeasure(DefaultMeasureBuilder builder) {
    Preconditions.checkNotNull(builder.value, "Measure value can't be null");
    Preconditions.checkNotNull(builder.metric, "Measure metric can't be null");
    Preconditions.checkState(builder.metric.valueType().equals(builder.value.getClass()), "Measure value should be of type " + builder.metric.valueType());
    this.inputFile = builder.file;
    this.metric = builder.metric;
    this.value = builder.value;
  }

  @CheckForNull
  @Override
  public InputFile inputFile() {
    return inputFile;
  }

  @Override
  public Metric metric() {
    return metric;
  }

  @Override
  public G value() {
    return value;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (obj == this) {
      return true;
    }
    if (obj.getClass() != getClass()) {
      return false;
    }
    DefaultMeasure rhs = (DefaultMeasure) obj;
    return new EqualsBuilder()
      .append(inputFile, rhs.inputFile)
      .append(metric, rhs.metric)
      .append(value, rhs.value)
      .isEquals();
  }

  @Override
  public int hashCode() {
    return new HashCodeBuilder(27, 45).
      append(inputFile).
      append(metric).
      append(value).
      toHashCode();
  }

  @Override
  public String toString() {
    return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
  }

}