/*
 * 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,
 * 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.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;
    }
}