com.livinglogic.ul4.FunctionInt.java Source code

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Here is the source code for com.livinglogic.ul4.FunctionInt.java

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/*
** Copyright 2009-2014 by LivingLogic AG, Bayreuth/Germany
** All Rights Reserved
** See LICENSE for the license
*/

package com.livinglogic.ul4;

import java.util.List;
import java.math.BigDecimal;
import java.math.BigInteger;

import org.apache.commons.lang.math.NumberUtils;

public class FunctionInt extends Function {
    public String nameUL4() {
        return "int";
    }

    private static final Signature signature = new Signature("obj", 0, "base", null);

    public Signature getSignature() {
        return signature;
    }

    public Object evaluate(BoundArguments args) {
        return call(args.get(0), args.get(1));
    }

    public static int call() {
        return 0;
    }

    public static Object call(Object obj) {
        if (obj instanceof String) {
            try {
                return Integer.valueOf((String) obj);
            } catch (NumberFormatException ex1) {
                try {
                    return Long.valueOf((String) obj);
                } catch (NumberFormatException ex2) {
                    return new BigInteger((String) obj);
                }
            }
        } else if (obj instanceof Integer || obj instanceof Byte || obj instanceof Short || obj instanceof Long)
            return obj;
        else if (obj instanceof BigInteger)
            return Utils.narrowBigInteger((BigInteger) obj);
        else if (obj instanceof Boolean)
            return ((Boolean) obj).booleanValue() ? NumberUtils.INTEGER_ONE : NumberUtils.INTEGER_ZERO;
        else if (obj instanceof Float || obj instanceof Double)
            return ((Number) obj).intValue();
        else if (obj instanceof BigDecimal)
            return ((BigDecimal) obj).toBigInteger();
        throw new ArgumentTypeMismatchException("int({})", obj);
    }

    public static Object call(Object obj1, Object obj2) {
        if (obj2 == null)
            return call(obj1);
        else if (obj1 instanceof String) {
            if (obj2 instanceof Integer || obj2 instanceof Byte || obj2 instanceof Short || obj2 instanceof Long
                    || obj2 instanceof BigInteger)
                return Integer.valueOf((String) obj1, ((Number) obj2).intValue());
        }
        throw new ArgumentTypeMismatchException("int({}, {})", obj1, obj2);
    }
}