io.pivotal.spring.xd.jdbcgpfdist.TestUtils.java Source code

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Here is the source code for io.pivotal.spring.xd.jdbcgpfdist.TestUtils.java

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/*
 * Copyright 2015 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 io.pivotal.spring.xd.jdbcgpfdist;

import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * Utils for tests.
 * 
 * @author Janne Valkealahti
 *
 */
public class TestUtils {

    @SuppressWarnings("unchecked")
    public static <T> T readField(String name, Object target) throws Exception {
        Field field = null;
        Class<?> clazz = target.getClass();
        do {
            try {
                field = clazz.getDeclaredField(name);
            } catch (Exception ex) {
            }

            clazz = clazz.getSuperclass();
        } while (field == null && !clazz.equals(Object.class));

        if (field == null)
            throw new IllegalArgumentException(
                    "Cannot find field '" + name + "' in the class hierarchy of " + target.getClass());
        field.setAccessible(true);
        return (T) field.get(target);
    }

    @SuppressWarnings("unchecked")
    public static <T> T callMethod(String name, Object target) throws Exception {
        Class<?> clazz = target.getClass();
        Method method = ReflectionUtils.findMethod(clazz, name);

        if (method == null)
            throw new IllegalArgumentException(
                    "Cannot find method '" + method + "' in the class hierarchy of " + target.getClass());
        method.setAccessible(true);
        return (T) ReflectionUtils.invokeMethod(method, target);
    }

    public static void setField(String name, Object target, Object value) throws Exception {
        Field field = null;
        Class<?> clazz = target.getClass();
        do {
            try {
                field = clazz.getDeclaredField(name);
            } catch (Exception ex) {
            }

            clazz = clazz.getSuperclass();
        } while (field == null && !clazz.equals(Object.class));

        if (field == null)
            throw new IllegalArgumentException(
                    "Cannot find field '" + name + "' in the class hierarchy of " + target.getClass());
        field.setAccessible(true);
        field.set(target, value);
    }

    @SuppressWarnings("unchecked")
    public static <T> T callMethod(String name, Object target, Object[] args, Class<?>[] argsTypes)
            throws Exception {
        Class<?> clazz = target.getClass();
        Method method = ReflectionUtils.findMethod(clazz, name, argsTypes);

        if (method == null)
            throw new IllegalArgumentException(
                    "Cannot find method '" + method + "' in the class hierarchy of " + target.getClass());
        method.setAccessible(true);
        return (T) ReflectionUtils.invokeMethod(method, target, args);
    }

}