org.raml.parser.utils.ConvertUtils.java Source code

Introduction

Here is the source code for org.raml.parser.utils.ConvertUtils.java

Source

/*
 * Copyright (c) MuleSoft, Inc.
 *
 * 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.raml.parser.utils;

import java.lang.reflect.Constructor;

import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.lang.ClassUtils;

/**
 * <p>ConvertUtils class.</p>
 *
 * @author kor
 * @version $Id: $Id
 */
public class ConvertUtils {

    private static BooleanConverter booleanConverter = new BooleanConverter();

    /**
     * <p>convertTo.</p>
     *
     * @param value a {@link java.lang.String} object.
     * @param type a {@link java.lang.Class} object.
     * @param <T> a T object.
     * @return a T object.
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static <T> T convertTo(String value, Class<T> type) {
        if (type.isEnum()) {
            return type.cast(Enum.valueOf((Class) type, value.toUpperCase()));
        }
        Class<T> clazz = type;
        if (type.isPrimitive()) {
            clazz = ClassUtils.primitiveToWrapper(type);
        }
        if (clazz.getName().equals(Boolean.class.getName())) {
            return clazz.cast(booleanConverter.convert(Boolean.class, value));
        }
        try {
            Constructor constructor = type.getConstructor(String.class);
            return (T) constructor.newInstance(value);
        } catch (Exception e) {
            //ignore;
        }

        return clazz.cast(org.apache.commons.beanutils.ConvertUtils.convert(value, type));
    }

    /**
     * <p>canBeConverted.</p>
     *
     * @param value a {@link java.lang.String} object.
     * @param type a {@link java.lang.Class} object.
     * @return a boolean.
     */
    public static boolean canBeConverted(String value, Class<?> type) {
        if (type.isEnum()) {
            Object[] enumConstants = type.getEnumConstants();
            for (Object enumConstant : enumConstants) {
                if (enumConstant.toString().equals(value.toUpperCase())) {
                    return true;
                }
            }
            return false;
        }
        if (type.isInstance(value)) {
            return true;
        }
        try {
            type.getConstructor(String.class);
            return true;
        } catch (NoSuchMethodException e) {
            //ignore
        }
        try {
            Class<?> wrapperClass = ClassUtils.primitiveToWrapper(type);
            convertTo(value, wrapperClass);
            return true;
        } catch (ClassCastException e) {
            return false;
        } catch (ConversionException e) {
            return false;
        }
    }
}