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org.drools.core.base.ValueType Maven / Gradle / Ivy
/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.time.temporal.Temporal;
import java.util.Date;
import org.drools.core.common.EventFactHandle;
import org.drools.core.factmodel.traits.Thing;
import org.drools.core.factmodel.traits.Trait;
import org.drools.core.facttemplates.FactTemplate;
import org.drools.core.util.MathUtils;
public class ValueType
implements
Externalizable {
private static final long serialVersionUID = 510l;
public static final ValueType NULL_TYPE = new ValueType( "null",
null,
SimpleValueType.NULL);
// primitive types
public static final ValueType PCHAR_TYPE = new ValueType( "char",
Character.TYPE,
SimpleValueType.CHAR );
public static final ValueType PBYTE_TYPE = new ValueType( "byte",
Byte.TYPE,
SimpleValueType.INTEGER );
public static final ValueType PSHORT_TYPE = new ValueType( "short",
Short.TYPE,
SimpleValueType.INTEGER );
public static final ValueType PINTEGER_TYPE = new ValueType( "int",
Integer.TYPE,
SimpleValueType.INTEGER );
public static final ValueType PLONG_TYPE = new ValueType( "long",
Long.TYPE,
SimpleValueType.INTEGER );
public static final ValueType PFLOAT_TYPE = new ValueType( "float",
Float.TYPE,
SimpleValueType.DECIMAL );
public static final ValueType PDOUBLE_TYPE = new ValueType( "double",
Double.TYPE,
SimpleValueType.DECIMAL );
public static final ValueType PBOOLEAN_TYPE = new ValueType( "boolean",
Boolean.TYPE,
SimpleValueType.BOOLEAN );
// wrapper types
public static final ValueType CHAR_TYPE = new ValueType( "Character",
Character.class,
SimpleValueType.CHAR );
public static final ValueType BYTE_TYPE = new ValueType( "Byte",
Byte.class,
SimpleValueType.INTEGER);
public static final ValueType SHORT_TYPE = new ValueType( "Short",
Short.class,
SimpleValueType.INTEGER );
public static final ValueType INTEGER_TYPE = new ValueType( "Integer",
Integer.class,
SimpleValueType.INTEGER );
public static final ValueType LONG_TYPE = new ValueType( "Long",
Long.class,
SimpleValueType.INTEGER );
public static final ValueType FLOAT_TYPE = new ValueType( "Float",
Float.class,
SimpleValueType.DECIMAL );
public static final ValueType DOUBLE_TYPE = new ValueType( "Double",
Double.class,
SimpleValueType.DECIMAL );
public static final ValueType BOOLEAN_TYPE = new ValueType( "Boolean",
Boolean.class,
SimpleValueType.BOOLEAN );
public static final ValueType NUMBER_TYPE = new ValueType( "Number",
Number.class,
SimpleValueType.DATE );
public static final ValueType BIG_DECIMAL_TYPE = new BigDecimalValueType();
public static final ValueType BIG_INTEGER_TYPE = new BigIntegerValueType();
// other types
public static final ValueType DATE_TYPE = new ValueType( "Date",
Date.class,
SimpleValueType.DATE );
public static final ValueType ARRAY_TYPE = new ValueType( "Array",
Object[].class,
SimpleValueType.LIST );
public static final ValueType STRING_TYPE = new StringValueType();
public static final ValueType OBJECT_TYPE = new ValueType( "Object",
Object.class,
SimpleValueType.OBJECT );
public static final ValueType FACTTEMPLATE_TYPE = new ValueType( "FactTemplate",
FactTemplate.class,
SimpleValueType.UNKNOWN );
public static final ValueType EVENT_TYPE = new ValueType( "Event",
EventFactHandle.class,
SimpleValueType.OBJECT );
public static final ValueType QUERY_TYPE = new ValueType( "Query",
DroolsQuery.class,
SimpleValueType.OBJECT );
public static final ValueType TRAIT_TYPE = new ValueType( "Trait",
Thing.class,
SimpleValueType.OBJECT );
public static final ValueType CLASS_TYPE = new ValueType( "Class",
Class.class,
SimpleValueType.OBJECT );
private String name;
private Class classType;
private int simpleType;
public ValueType() {
this(null, null, 0);
}
private ValueType(final String name,
final Class classType,
final int simpleType) {
this.name = name;
this.classType = classType;
this.simpleType = simpleType;
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
name = (String)in.readObject();
classType = (Class)in.readObject();
simpleType = in.readInt();
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(name);
out.writeObject(classType);
out.writeInt(simpleType);
}
private Object readResolve() throws java.io.ObjectStreamException {
return determineValueType( this.classType );
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#getName()
*/
public String getName() {
return this.name;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#getClassType()
*/
public Class getClassType() {
return this.classType;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#getSimpleType()
*/
public int getSimpleType() {
return this.simpleType;
}
public static ValueType determineValueType(final Class clazz) {
if ( clazz == null ) {
return ValueType.NULL_TYPE;
}
// primitives
if ( clazz == FactTemplate.class ) {
return ValueType.FACTTEMPLATE_TYPE;
} else if ( clazz == DroolsQuery.class ) {
return ValueType.QUERY_TYPE;
} else if ( clazz == Character.TYPE ) {
return ValueType.PCHAR_TYPE;
} else if ( clazz == Byte.TYPE ) {
return ValueType.PBYTE_TYPE;
} else if ( clazz == Short.TYPE ) {
return ValueType.PSHORT_TYPE;
} else if ( clazz == Integer.TYPE ) {
return ValueType.PINTEGER_TYPE;
} else if ( clazz == Long.TYPE ) {
return ValueType.PLONG_TYPE;
} else if ( clazz == Float.TYPE ) {
return ValueType.PFLOAT_TYPE;
} else if ( clazz == Double.TYPE ) {
return ValueType.PDOUBLE_TYPE;
} else if ( clazz == Boolean.TYPE ) {
return ValueType.PBOOLEAN_TYPE;
}
// Number Wrappers
if ( clazz == Character.class ) {
return ValueType.CHAR_TYPE;
} else if ( clazz == Byte.class ) {
return ValueType.BYTE_TYPE;
} else if ( clazz == Short.class ) {
return ValueType.SHORT_TYPE;
} else if ( clazz == Integer.class ) {
return ValueType.INTEGER_TYPE;
} else if ( clazz == Long.class ) {
return ValueType.LONG_TYPE;
} else if ( clazz == Float.class ) {
return ValueType.FLOAT_TYPE;
} else if ( clazz == Double.class ) {
return ValueType.DOUBLE_TYPE;
} else if ( clazz == Boolean.class ) {
return ValueType.BOOLEAN_TYPE;
} else if ( clazz == BigDecimal.class ) {
return ValueType.BIG_DECIMAL_TYPE;
} else if ( clazz == BigInteger.class ) {
return ValueType.BIG_INTEGER_TYPE;
} else if ( Number.class.isAssignableFrom( clazz ) ) {
return ValueType.NUMBER_TYPE;
}
// Other Object types
if ( isDateType( clazz ) ) {
return ValueType.DATE_TYPE;
} else if ( clazz.isArray() ) {
return ValueType.ARRAY_TYPE;
} else if ( clazz == String.class ) {
return ValueType.STRING_TYPE;
} else if ( clazz == EventFactHandle.class ) {
return ValueType.EVENT_TYPE;
} else if ( clazz == Class.class ) {
return ValueType.CLASS_TYPE;
}
else if ( Thing.class.isAssignableFrom( clazz ) || clazz.isAnnotationPresent( Trait.class ) ) {
return ValueType.TRAIT_TYPE;
} else {
return ValueType.OBJECT_TYPE;
}
}
public static boolean isDateType( Class clazz ) {
return Date.class.isAssignableFrom( clazz ) || Temporal.class.isAssignableFrom( clazz );
}
public String toString() {
return "ValueType = '" + this.name + "'";
}
public int hashCode() {
return this.name.hashCode();
}
public boolean equals(final Object object) {
if ( object == this ) {
return true;
} else if (object instanceof ValueType) {
ValueType that = (ValueType)object;
return classType == that.classType &&
simpleType == that.simpleType &&
(name == that.name || name != null && name.equals(that.name));
}
return false;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#isBoolean()
*/
public boolean isBoolean() {
return ((this.classType == Boolean.class) || (this.classType == Boolean.TYPE));
}
public boolean isDate() {
return this.classType == Date.class;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#isNumber()
*/
public boolean isNumber() {
return ( this.simpleType == SimpleValueType.INTEGER ||
this.simpleType == SimpleValueType.DECIMAL ||
this.simpleType == SimpleValueType.CHAR ||
this.simpleType == SimpleValueType.NUMBER ) ;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#isIntegerNumber()
*/
public boolean isIntegerNumber() {
return this.simpleType == SimpleValueType.INTEGER;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#isFloatNumber()
*/
public boolean isFloatNumber() {
return this.simpleType == SimpleValueType.DECIMAL;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#isChar()
*/
public boolean isChar() {
return this.simpleType == SimpleValueType.CHAR;
}
/* (non-Javadoc)
* @see org.kie.base.ValueTypeInterface#isEvent()
*/
public boolean isEvent() {
return this.classType == EventFactHandle.class;
}
public T coerce(Object value) {
return (T)value;
}
public static class StringValueType extends ValueType {
public StringValueType() {
super("String", String.class, SimpleValueType.STRING);
}
@Override
public String coerce( Object value ) {
if (value == null) {
return null;
}
return value instanceof String ? (String)value : value.toString();
}
}
public static class BigIntegerValueType extends ValueType {
public BigIntegerValueType() {
super("BigInteger", BigInteger.class, SimpleValueType.NUMBER);
}
@Override
public BigInteger coerce( Object value ) {
if (value == null) {
return null;
}
return MathUtils.getBigInteger( value );
}
}
public static class BigDecimalValueType extends ValueType {
public BigDecimalValueType() {
super("BigDecimal", BigDecimal.class, SimpleValueType.NUMBER);
}
@Override
public BigDecimal coerce( Object value ) {
if (value == null) {
return null;
}
return MathUtils.getBigDecimal( value );
}
}
}
