org.pentaho.di.trans.steps.uniquerowsbyhashset.RowKey Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of kettle-engine Show documentation

Container pom for Pentaho Data Integration modules

The newest version!

/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2018 by Hitachi Vantara : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * 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 org.pentaho.di.trans.steps.uniquerowsbyhashset;

import java.util.Arrays;

// Package private
class RowKey {
  // TODO: This field needs to be set by a checkbox in the step dialog.
  private boolean storeValues;
  private int hash;
  private Object[] storedFieldValues;

  public RowKey( Object[] row, UniqueRowsByHashSetData sdi ) {
    Object[] keyFields;
    // If we are keying on the entire row
    if ( sdi.fieldnrs.length == 0 ) {
      keyFields = row;
    } else {
      keyFields = new Object[sdi.fieldnrs.length];
      for ( int i = 0; i < sdi.fieldnrs.length; i++ ) {
        keyFields[i] = row[sdi.fieldnrs[i]];
      }
    }
    hash = calculateHashCode( keyFields );

    this.storeValues = sdi.storeValues;
    if ( storeValues ) {
      this.storedFieldValues = keyFields;
    }
  }

  private int calculateHashCode( Object[] keyFields ) {
    // deep used because Binary type is a native byte[]
    return Arrays.deepHashCode( keyFields );
  }

  @Override
  public boolean equals( Object obj ) {
    if ( storeValues ) {
      // deep used because Binary type is a native byte[]
      return Arrays.deepEquals( storedFieldValues, ( (RowKey) obj ).storedFieldValues );
    } else {
      return true;
    }
  }

  @Override
  public int hashCode() {
    return hash;
  }
}