org.diffkit.util.DKObjectUtil.java Source code

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Here is the source code for org.diffkit.util.DKObjectUtil.java

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/**
 * Copyright 2010-2011 Joseph Panico
 *
 * 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.diffkit.util;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.commons.beanutils.MethodUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.diffkit.common.DKValidate;

/**
 * @author jpanico
 */
public class DKObjectUtil {
    private static final Logger LOG = LoggerFactory.getLogger(DKObjectUtil.class);

    private DKObjectUtil() {
    }

    /**
     * null safe
     */
    public static String toString(Object target_) {
        if (target_ == null)
            return "null";
        return target_.toString();
    }

    /**
     * Hex String representation of identity hashCode()
     */
    public static String getAddressHexString(Object target_) {
        if (target_ == null)
            return null;
        return "@" + Integer.toHexString(System.identityHashCode(target_));
    }

    @SuppressWarnings("rawtypes")
    public static boolean respondsTo(Object target_, String methodName_, Class[] parmTypes_) {
        if ((target_ == null) || (methodName_ == null))
            return false;
        if (parmTypes_ == null)
            parmTypes_ = new Class[0];
        Method method = MethodUtils.getMatchingAccessibleMethod(target_.getClass(), methodName_, parmTypes_);
        return (method != null);
    }

    @SuppressWarnings("rawtypes")
    public static Object invoke(Object target_, String methodName_, Class[] args_)
            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
        DKValidate.notNull(target_, methodName_);

        return MethodUtils.invokeMethod(target_, methodName_, args_);
    }

    /**
     * convenience method that calls invoke(Object,String,Class[])
     */
    @SuppressWarnings("rawtypes")
    public static Object invokeSafe(Object target_, String methodName_, Class[] args_) {
        try {
            return MethodUtils.invokeMethod(target_, methodName_, args_);
        } catch (Exception e_) {
            LOG.warn(null, e_);
            return null;
        }
    }
}