/**
* Copyright 2005 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.spi;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.drools.RuntimeDroolsException;
import org.drools.base.ClassObjectType;
import org.drools.base.ValueType;
import org.drools.common.EventFactHandle;
import org.drools.common.InternalWorkingMemory;
import org.drools.core.util.ClassUtils;
import org.drools.core.util.MathUtils;
import org.drools.facttemplates.Fact;
public class PatternExtractor
implements
InternalReadAccessor,
AcceptsClassObjectType,
Externalizable {
/**
*
*/
private static final long serialVersionUID = 510l;
private ObjectType objectType;
public PatternExtractor() {
this( null );
}
public PatternExtractor(final ObjectType objectType) {
this.objectType = objectType;
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
objectType = (ObjectType) in.readObject();
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject( objectType );
}
public void setClassObjectType(ClassObjectType objectType) {
this.objectType = objectType;
}
public Object getValue(InternalWorkingMemory workingMemory,
final Object object) {
return object;
}
public ObjectType getObjectType() {
return this.objectType;
}
public Class<?> getExtractToClass() {
// @todo : this is a bit nasty, but does the trick
if ( this.objectType instanceof ClassObjectType ) {
return ((ClassObjectType) this.objectType).getClassType();
} else {
return Fact.class;
}
}
public String getExtractToClassName() {
Class<?> clazz = null;
// @todo : this is a bit nasty, but does the trick
if ( this.objectType instanceof ClassObjectType ) {
clazz = ((ClassObjectType) this.objectType).getClassType();
} else {
clazz = Fact.class;
}
return ClassUtils.canonicalName( clazz );
}
public ValueType getValueType() {
return this.objectType.getValueType();
}
public boolean getBooleanValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isBoolean() ) {
return ((Boolean) object).booleanValue();
}
throw new RuntimeDroolsException( "Conversion to boolean not supported for type: " + object.getClass() );
}
public byte getByteValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isNumber() ) {
return ((Number) object).byteValue();
}
throw new RuntimeDroolsException( "Conversion to byte not supported for type: " + object.getClass() );
}
public char getCharValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isChar() ) {
return ((Character) object).charValue();
}
throw new RuntimeDroolsException( "Conversion to char not supported for type: " + object.getClass() );
}
public double getDoubleValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isNumber() ) {
return ((Number) object).doubleValue();
}
throw new RuntimeDroolsException( "Conversion to double not supported for type: " + object.getClass() );
}
public float getFloatValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isNumber() ) {
return ((Number) object).floatValue();
}
throw new RuntimeDroolsException( "Conversion to float not supported for type: " + object.getClass() );
}
public int getIntValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isNumber() ) {
return ((Number) object).intValue();
}
throw new RuntimeDroolsException( "Conversion to int not supported for type: " + object.getClass() );
}
public long getLongValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isNumber() ) {
return ((Number) object).longValue();
} else if( object instanceof EventFactHandle ) {
// special case for handling event timestamps
return ((EventFactHandle)object).getStartTimestamp();
}
throw new RuntimeDroolsException( "Conversion to long not supported for type: " + object.getClass() );
}
public short getShortValue(InternalWorkingMemory workingMemory,
final Object object) {
if ( this.objectType.getValueType().isNumber() ) {
return ((Number) object).shortValue();
}
throw new RuntimeDroolsException( "Conversion to short not supported for type: " + object.getClass() );
}
public Method getNativeReadMethod() {
try {
return this.getClass().getDeclaredMethod( "getValue",
new Class[]{InternalWorkingMemory.class, Object.class} );
} catch ( final Exception e ) {
throw new RuntimeDroolsException( "This is a bug. Please report to development team: " + e.getMessage(),
e );
}
}
public boolean isNullValue(InternalWorkingMemory workingMemory,
final Object object) {
return getValue( workingMemory,
object ) == null;
}
public int getHashCode(InternalWorkingMemory workingMemory,
final Object object) {
return getValue( workingMemory,
object ).hashCode();
}
public int hashCode() {
return this.objectType.hashCode();
}
public boolean equals(final Object obj) {
if ( this == obj ) {
return true;
}
if ( !(obj instanceof PatternExtractor) ) {
return false;
}
final PatternExtractor other = (PatternExtractor) obj;
return this.objectType.equals( other.objectType );
}
public boolean isGlobal() {
return false;
}
public boolean isSelfReference() {
return false;
}
public boolean getBooleanValue(Object object) {
return getBooleanValue( null,
object );
}
public byte getByteValue(Object object) {
return getByteValue( null,
object );
}
public char getCharValue(Object object) {
return getCharValue( null,
object );
}
public double getDoubleValue(Object object) {
return getDoubleValue( null,
object );
}
public float getFloatValue(Object object) {
return getFloatValue( null,
object );
}
public int getHashCode(Object object) {
return getHashCode( null,
object );
}
public int getIndex() {
return -1;
}
public int getIntValue(Object object) {
return getIntValue( null,
object );
}
public long getLongValue(Object object) {
return getLongValue( null,
object );
}
public short getShortValue(Object object) {
return getShortValue( null,
object );
}
public Object getValue(Object object) {
return getValue( null,
object );
}
public BigDecimal getBigDecimalValue(Object object) {
return getBigDecimalValue( null,
object );
}
public BigInteger getBigIntegerValue(Object object) {
return getBigIntegerValue( null,
object );
}
public BigDecimal getBigDecimalValue(InternalWorkingMemory workingMemory,
Object object) {
return MathUtils.getBigDecimal( getValue( workingMemory,
object ) );
}
public BigInteger getBigIntegerValue(InternalWorkingMemory workingMemory,
Object object) {
return MathUtils.getBigInteger( getValue( workingMemory,
object ) );
}
public boolean isNullValue(Object object) {
return isNullValue( null,
object );
}
}