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Groovy: A powerful, dynamic language for the JVM

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/*
 * 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.ClassInfo;

import java.math.BigInteger;

/**
 * @author Alex.Tkachman
 */
public class IntegerCachedClass extends NumberCachedClass {  // int, Integer
    private boolean allowNull;

    public IntegerCachedClass(Class klazz, ClassInfo classInfo, boolean allowNull) {
        super(klazz, classInfo);
        this.allowNull = allowNull;
    }

    public Object coerceArgument(Object argument) {
        if (argument instanceof Integer) {
            return argument;
        }

        if (argument instanceof Number) {
            return ((Number) argument).intValue();
        }
        return argument;
    }

    public boolean isDirectlyAssignable(Object argument) {
        return (allowNull && argument == null) || argument instanceof Integer;
    }

    public boolean isAssignableFrom(Class classToTransformFrom) {
        return (allowNull && classToTransformFrom == null)
                || classToTransformFrom == Integer.class
                || classToTransformFrom == Short.class
                || classToTransformFrom == Byte.class
                || classToTransformFrom == BigInteger.class
                || classToTransformFrom == Integer.TYPE
                || classToTransformFrom == Short.TYPE
                || classToTransformFrom == Byte.TYPE;
    }
}