/**
* 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.base.field;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.Serializable;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import org.drools.RuntimeDroolsException;
import org.drools.common.DroolsObjectInputStream;
import org.drools.core.util.MathUtils;
import org.drools.spi.FieldValue;
public class ObjectFieldImpl
implements
FieldValue,
Externalizable {
private static final long serialVersionUID = 510l;
private Object value;
// the isEnum attribute is used to support jdk 1.4 type safe enums, and so
// has a different behavior of the other booleans in this class
private boolean isEnum;
private String enumName;
private String fieldName;
private transient boolean isCollection;
private transient boolean isNumber;
private transient boolean isBoolean;
private transient boolean isCharacter;
private transient boolean isString;
public ObjectFieldImpl() {
this( null );
}
public ObjectFieldImpl(final Object value) {
this.value = value;
this.isEnum = value instanceof Enum;
setBooleans();
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
isEnum = in.readBoolean();
enumName = (String) in.readObject();
fieldName = (String) in.readObject();
if ( !isEnum || enumName == null || fieldName == null ) {
value = (Serializable) in.readObject();
} else {
resolveEnumValue( (DroolsObjectInputStream) in );
}
setBooleans();
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeBoolean( isEnum );
out.writeObject( enumName );
out.writeObject( fieldName );
if ( !isEnum || enumName == null || fieldName == null ) {
out.writeObject( value );
}
}
private void resolveEnumValue( DroolsObjectInputStream in ) {
try {
final ClassLoader loader = in.getClassLoader();
final Class<?> staticClass = Class.forName( enumName, true, loader );
//final Class<?> staticClass = Class.forName( enumName );
value = (Serializable) staticClass.getField( fieldName ).get( null );
} catch ( final Exception e ) {
throw new RuntimeDroolsException("Error deserializing enum value "+enumName+"."+fieldName+" : "+e.getMessage());
}
}
/**
* @param value
*/
private void setBooleans() {
this.isCollection = value instanceof Collection;
this.isNumber = value instanceof Number;
this.isBoolean = value instanceof Boolean;
this.isCharacter = value instanceof Character;
this.isString = value instanceof String;
}
public Object getValue() {
return this.value;
}
public String toString() {
return this.value == null ? "null" : this.value.toString();
}
public boolean getBooleanValue() {
if ( isBoolean ) {
return ((Boolean) this.value).booleanValue();
} else if ( isString ) {
return Boolean.valueOf( (String) this.value ).booleanValue();
}
throw new RuntimeDroolsException( "Conversion to boolean not supported for type: " + this.value.getClass() );
}
public byte getByteValue() {
if ( isNumber ) {
return ((Number) this.value).byteValue();
} else if ( isString ) {
return Byte.valueOf( (String) this.value ).byteValue();
}
throw new RuntimeDroolsException( "Conversion to byte not supported for type: " + this.value.getClass() );
}
public char getCharValue() {
if ( isCharacter ) {
return ((Character) this.value).charValue();
} else if ( isString && ((String) this.value).length() == 1 ) {
return ((String) this.value).charAt( 0 );
}
throw new RuntimeDroolsException( "Conversion to char not supported for type: " + this.value.getClass() );
}
public double getDoubleValue() {
if ( isNumber ) {
return ((Number) this.value).doubleValue();
} else if ( isString ) {
return Double.valueOf( (String) this.value ).doubleValue();
}
throw new RuntimeDroolsException( "Conversion to double not supported for type: " + this.value.getClass() );
}
public float getFloatValue() {
if ( isNumber ) {
return ((Number) this.value).floatValue();
} else if ( isString ) {
return Float.valueOf( (String) this.value ).floatValue();
}
throw new RuntimeDroolsException( "Conversion to float not supported for type: " + this.value.getClass() );
}
public int getIntValue() {
if ( isNumber ) {
return ((Number) this.value).intValue();
} else if ( isString ) {
return Integer.valueOf( (String) this.value ).intValue();
}
throw new RuntimeDroolsException( "Conversion to int not supported for type: " + this.value.getClass() );
}
public long getLongValue() {
if ( isNumber ) {
return ((Number) this.value).longValue();
} else if ( isString ) {
return Long.valueOf( (String) this.value ).longValue();
}
throw new RuntimeDroolsException( "Conversion to long not supported for type: " + this.value.getClass() );
}
public short getShortValue() {
if ( isNumber ) {
return ((Number) this.value).shortValue();
} else if ( isString ) {
return Short.valueOf( (String) this.value ).shortValue();
}
throw new RuntimeDroolsException( "Conversion to short not supported for type: " + this.value.getClass() );
}
public boolean equals(final Object object) {
if ( this == object ) {
return true;
}
if ( object == null || !(object instanceof ObjectFieldImpl) ) {
return false;
}
final ObjectFieldImpl other = (ObjectFieldImpl) object;
return (((this.value == null) && (other.value == null)) || ((this.value != null) && (this.value.equals( other.value ))));
}
public int hashCode() {
if ( this.value != null ) {
return this.value.hashCode();
} else {
return 0;
}
}
public boolean isNull() {
return value == null;
}
public boolean isBooleanField() {
return false;
}
public boolean isFloatNumberField() {
return false;
}
public boolean isIntegerNumberField() {
return false;
}
public boolean isObjectField() {
return true;
}
public boolean isCollectionField() {
return this.isCollection;
}
public boolean isStringField() {
return this.isString;
}
public BigDecimal getBigDecimalValue() {
return MathUtils.getBigDecimal( this.value );
}
public BigInteger getBigIntegerValue() {
return MathUtils.getBigInteger( this.value );
}
public boolean isEnum() {
return isEnum;
}
public void setEnum(boolean isEnum) {
this.isEnum = isEnum;
}
public String getEnumName() {
return enumName;
}
public void setEnumName(String enumName) {
this.enumName = enumName;
}
public String getFieldName() {
return fieldName;
}
public void setFieldName(String fieldName) {
this.fieldName = fieldName;
}
}