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Groovy example source code file (NumberCachedClass.java)

This example Groovy source code file (NumberCachedClass.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

byte, byte, cachedclass, class, classinfo, classinfo, math, number, numbercachedclass, numbercachedclass, object, object

The Groovy NumberCachedClass.java source code

 * Copyright 2003-2007 the original author or authors.
 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.codehaus.groovy.reflection.stdclasses;

import org.codehaus.groovy.reflection.CachedClass;
import org.codehaus.groovy.reflection.ClassInfo;

import java.math.BigInteger;

 * @author Alex.Tkachman
public class NumberCachedClass extends CachedClass {

    public NumberCachedClass(Class klazz, ClassInfo classInfo) {
        super(klazz, classInfo);

    public Object coerceArgument(Object argument) {
        if (argument instanceof Number) {
            return coerceNumber(argument);
        return argument;


    public boolean isAssignableFrom(Class classToTransformFrom) {
        return classToTransformFrom == null
            || Number.class.isAssignableFrom(classToTransformFrom)
            || classToTransformFrom == Byte.TYPE
            || classToTransformFrom == Short.TYPE
            || classToTransformFrom == Integer.TYPE
            || classToTransformFrom == Long.TYPE
            || classToTransformFrom == Float.TYPE
            || classToTransformFrom == Double.TYPE

    private Object coerceNumber(Object argument) {
        Class param = getTheClass();
        if (param == Byte.class /*|| param == Byte.TYPE*/) {
            argument = new Byte(((Number) argument).byteValue());
        } else if (param == BigInteger.class) {
            argument = new BigInteger(String.valueOf((Number) argument));

        return argument;

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