/*
* Copyright 2008 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.core.base;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.drools.core.util.asm.ClassFieldInspector;
import org.drools.core.spi.WriteAccessor;
/**
* This is the supertype for the ASM generated classes for writing values into fields.
*/
abstract public class BaseClassFieldWriter
implements
WriteAccessor {
private int index;
private Class< ? > fieldType;
private ValueType valueType;
public BaseClassFieldWriter() {
}
/**
* This constructor is not supposed to be used from outside the class hirarchy
*
* @param index
* @param fieldType
* @param valueType
*/
protected BaseClassFieldWriter(final int index,
final Class< ? > fieldType,
final ValueType valueType) {
this.index = index;
this.fieldType = fieldType;
this.valueType = valueType;
}
/**
* This is the constructor to be used
*
* @param clazz
* @param fieldName
*/
public BaseClassFieldWriter(final Class< ? > clazz,
final String fieldName) {
try {
final ClassFieldInspector inspector = new ClassFieldInspector( clazz );
this.index = ((Integer) inspector.getFieldNames().get( fieldName )).intValue();
this.fieldType = (Class< ? >) inspector.getFieldTypes().get( fieldName );
this.valueType = ValueType.determineValueType( this.fieldType );
} catch ( final Exception e ) {
throw new RuntimeException( e );
}
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
index = in.readInt();
fieldType = (Class< ? >) in.readObject();
valueType = (ValueType) in.readObject();
if ( valueType != null ) {
valueType = ValueType.determineValueType( valueType.getClassType() );
}
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeInt( index );
out.writeObject( fieldType );
out.writeObject( valueType );
}
public int getIndex() {
return this.index;
}
public Class< ? > getFieldType() {
return this.fieldType;
}
public ValueType getValueType() {
return this.valueType;
}
public void setBigDecimalValue(Object bean,
BigDecimal value) {
setValue( bean,
value );
}
public void setBigIntegerValue(Object bean,
BigInteger value) {
setValue( bean,
value );
}
public int hashCode() {
final int PRIME = 31;
int result = 1;
result = PRIME * result + this.fieldType.hashCode();
result = PRIME * result + this.index;
result = PRIME * result + this.valueType.hashCode();
return result;
}
public boolean equals(final Object object) {
if ( this == object ) {
return true;
}
if ( !(object instanceof BaseClassFieldWriter) ) {
return false;
}
final BaseClassFieldWriter other = (BaseClassFieldWriter) object;
return this.fieldType == other.fieldType && this.index == other.index && this.valueType.equals( other.valueType );
}
}