/*
* Copyright 2010 JBoss Inc
*
* 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.drools.runtime.rule.impl;
import org.drools.common.InternalFactHandle;
import org.drools.reteoo.LeftTuple;
import org.drools.rule.Declaration;
import org.drools.rule.Rule;
import org.kie.runtime.rule.FactHandle;
import org.kie.runtime.rule.Row;
public class RowAdapter implements Row {
private Rule rule;
private LeftTuple leftTuple;
private InternalFactHandle[] factHandles;
public RowAdapter(final Rule rule,
final LeftTuple leftTuple) {
this.rule = rule;
this.leftTuple = leftTuple;
}
private InternalFactHandle getFactHandle(Declaration declr) {
return this.factHandles[ declr.getPattern().getOffset() ];
}
public Object get(String identifier) {
if ( factHandles == null ) {
this.factHandles = this.leftTuple.toFactHandles();
}
Declaration declr = this.rule.getDeclaration( identifier );
if ( declr == null ) {
throw new RuntimeException("The identifier '" + identifier + "' does not exist as a bound varirable for this query" );
}
InternalFactHandle factHandle = getFactHandle( declr );
return declr.getValue( null, factHandle.getObject() );
}
public FactHandle getFactHandle(String identifier) {
if ( factHandles == null ) {
this.factHandles = this.leftTuple.toFactHandles();
}
Declaration declr = this.rule.getDeclaration( identifier );
if ( declr == null ) {
throw new RuntimeException("The identifier '" + identifier + "' does not exist as a bound varirable for this query" );
}
InternalFactHandle factHandle = getFactHandle( declr );
return factHandle;
}
public FactHandle getFactHandle(int i) {
if ( factHandles == null ) {
this.factHandles = this.leftTuple.toFactHandles();
}
return null;
}
public int size() {
if ( factHandles == null ) {
this.factHandles = this.leftTuple.toFactHandles();
}
return 0;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((this.leftTuple == null) ? 0 : this.leftTuple.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
RowAdapter other = (RowAdapter) obj;
if (this.leftTuple == null) {
if (other.leftTuple != null)
return false;
} else if (!this.leftTuple.equals(other.leftTuple))
return false;
return true;
}
public String toString() {
StringBuilder sbuilder = new StringBuilder();
for ( int i = 0, length = this.factHandles.length -1; i < length; i++ ) {
sbuilder.append( this.factHandles[i].getObject().toString() );
if ( i < length - 1 ) {
sbuilder.append( ", " );
}
}
return "Row[" + sbuilder.toString() +"]";
}
}