/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.ogm.grid;
import java.io.Serializable;
import java.util.Arrays;
/**
* Represents the key used to represent a row
*
* @author Emmanuel Bernard
*/
public final class RowKey implements Serializable {
private final String table;
private final String[] columnNames;
//column value types do have to be serializable so RowKey can be serializable
//should it be a Serializable[] type? It seems to be more pain than anything else
private final Object[] columnValues;
private final int hashCode;
public RowKey(String table, String[] columnNames, Object[] columnValues) {
this.table = table;
this.columnNames = columnNames;
this.columnValues = columnValues;
this.hashCode = generateHashCode();
}
public String getTable() {
return table;
}
/**
* This class should be treated as immutable. While we expose this array,
* you should never make changes to it!
* This is a design tradeoff vs. raw performance and memory usage.
*/
public String[] getColumnNames() {
return columnNames;
}
/**
* This class should be treated as immutable. While we expose this array,
* you should never make changes to it!
* This is a design tradeoff vs. raw performance and memory usage.
*/
public Object[] getColumnValues() {
return columnValues;
}
@Override
public boolean equals(Object o) {
if ( this == o ) {
return true;
}
if ( o == null || RowKey.class != o.getClass() ) {
return false;
}
RowKey that = ( RowKey ) o;
if ( !table.equals( that.table ) ) {
return false;
}
// Probably incorrect - comparing Object[] arrays with Arrays.equals
if ( !Arrays.equals( columnValues, that.columnValues ) ) {
return false;
}
if ( !Arrays.equals( columnNames, that.columnNames ) ) {
return false;
}
return true;
}
@Override
public int hashCode() {
return hashCode;
}
private int generateHashCode() {
final int result = table.hashCode();
return 31 * result + Arrays.hashCode( columnValues );
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append( "RowKey" );
sb.append( "{table='" ).append( table ).append( '\'' );
sb.append( ", columnNames=" ).append( columnNames == null ? "null" : Arrays.asList( columnNames ).toString() );
sb.append( ", columnValues=" )
.append( columnValues == null ? "null" : Arrays.asList( columnValues ).toString() );
sb.append( '}' );
return sb.toString();
}
}