FieldProxy.java

package org.test4j.tools.reflector.imposteriser;

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

import org.test4j.module.core.TestContext;
import org.test4j.tools.reflector.FieldAccessor;

/**
 * 目标对象字段的代理<br>
 * 用于运行时动态获得目标对象字段的实际值调用<br>
 * see @SpringBeanFor <br>
 * see @Inject
 * 
 * @author darui.wudr
 * 
 */
@SuppressWarnings("rawtypes")
public class FieldProxy implements Invokable {
	private final String fieldName;

	private final FieldAccessor accessor;

	private final Class testClazz;

	public FieldProxy(final Class testClazz, final String fieldName) {
		this.fieldName = fieldName;
		this.accessor = new FieldAccessor(testClazz, fieldName);
		this.testClazz = testClazz;
	}

	public Object invoke(Invocation invocation) throws Throwable {
		Object test = TestContext.currTestedObject();
		Object fieldValue = accessor.get(test);
		if (fieldValue == null) {
			throw new NullPointerException(String.format("field[%s] value of object[%s] is null.", fieldName,
					testClazz.getName()));
		}
		try {
			Method method = invocation.getInvokedMethod();
			Object[] paras = invocation.getParametersAsArray();
			boolean accessible = method.isAccessible();
			if (accessible == false) {
				method.setAccessible(true);
			}
			Object o = method.invoke(fieldValue, paras);
			if (accessible == false) {
				method.setAccessible(false);
			}
			return o;
		} catch (Throwable e) {
			if (e instanceof InvocationTargetException) {
				throw ((InvocationTargetException) e).getTargetException();
			} else {
				throw e;
			}
		}
	}
}