not needed anymore in 2
This commit is contained in:
Keith Donald
@@ -1,104 +0,0 @@
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/*
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* Copyright 2004-2007 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.webflow.util;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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/**
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* Simple utility class for working with the java reflection API. Only intended for internal use. Will likely disappear
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* in a future release of Spring Web Flow and simply rely on {@link org.springframework.util.ReflectionUtils} if
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* necessary.
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*
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* @author Keith Donald
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*/
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public class ReflectionUtils {
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/**
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* Invoke the specified {@link Method} against the supplied target object with no arguments. The target object can
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* be <code>null</code> when invoking a static {@link Method}. All exceptions are treated as fatal and will be
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* converted to unchecked exceptions.
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* @see #invokeMethod(java.lang.reflect.Method, Object, Object[])
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* @throws RuntimeException when something goes wrong invoking the method or when the method itself throws an
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* exception
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*/
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public static Object invokeMethod(Method method, Object target) throws RuntimeException {
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return invokeMethod(method, target, null);
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}
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/**
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* Invoke the specified {@link Method} against the supplied target object with the supplied arguments. The target
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* object can be null when invoking a static {@link Method}. All exceptions are treated as fatal and will be
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* converted to unchecked exceptions.
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* @see #invokeMethod(java.lang.reflect.Method, Object, Object[])
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* @throws RuntimeException when something goes wrong invoking the method or when the method itself throws an
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* exception
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*/
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public static Object invokeMethod(Method method, Object target, Object[] args) throws RuntimeException {
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try {
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return method.invoke(target, args);
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} catch (IllegalAccessException ex) {
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handleReflectionException(ex);
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throw new IllegalStateException("Unexpected reflection exception - " + ex.getClass().getName() + ": "
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+ ex.getMessage());
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} catch (InvocationTargetException ex) {
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handleReflectionException(ex);
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throw new IllegalStateException("Unexpected reflection exception - " + ex.getClass().getName() + ": "
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+ ex.getMessage());
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}
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}
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/**
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* Handle the given reflection exception. Should only be called if no checked exception is expected to be thrown by
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* the target method.
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* <p>
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* Throws the underlying RuntimeException or Error in case of an InvocationTargetException with such a root cause.
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* Throws an IllegalStateException with an appropriate message else.
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* @param ex the reflection exception to handle
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*/
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private static void handleReflectionException(Exception ex) {
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if (ex instanceof NoSuchMethodException) {
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throw new IllegalStateException("Method not found: " + ex.getMessage());
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}
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if (ex instanceof IllegalAccessException) {
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throw new IllegalStateException("Could not access method: " + ex.getMessage());
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}
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if (ex instanceof InvocationTargetException) {
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handleInvocationTargetException((InvocationTargetException) ex);
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}
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throw new IllegalStateException("Unexpected reflection exception - " + ex.getClass().getName() + ": "
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+ ex.getMessage());
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}
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/**
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* Handle the given invocation target exception. Should only be called if no checked exception is expected to be
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* thrown by the target method.
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* <p>
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* Throws the underlying RuntimeException or Error in case of such a root cause. Throws an IllegalStateException
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* else.
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* @param ex the invocation target exception to handle
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*/
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private static void handleInvocationTargetException(InvocationTargetException ex) {
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if (ex.getTargetException() instanceof RuntimeException) {
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throw (RuntimeException) ex.getTargetException();
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}
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if (ex.getTargetException() instanceof Error) {
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throw (Error) ex.getTargetException();
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}
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throw new IllegalStateException("Unexpected exception thrown by method - "
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+ ex.getTargetException().getClass().getName() + ": " + ex.getTargetException().getMessage());
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}
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}
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@@ -1,83 +0,0 @@
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/*
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* Copyright 2004-2007 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.webflow.util;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.util.Date;
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import junit.framework.TestCase;
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/**
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* Test case for {@link org.springframework.webflow.util.ReflectionUtils}.
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*
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* @author Erwin Vervaet
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*/
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public class ReflectionUtilsTests extends TestCase {
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public void testInvokeStatic() throws Exception {
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Method currentTimeMillis = System.class.getMethod("currentTimeMillis", null);
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Object res = ReflectionUtils.invokeMethod(currentTimeMillis, null);
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assertNotNull(res);
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assertTrue(res instanceof Long);
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}
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public void testInvoke() throws Exception {
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Method substring = String.class.getMethod("substring", new Class[] { Integer.TYPE });
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Object res = ReflectionUtils.invokeMethod(substring, "abc123", new Object[] { new Integer(3) });
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assertNotNull(res);
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assertTrue(res instanceof String);
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assertEquals("123", res);
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}
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public void testInvokeProblem() throws Exception {
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Method substring = String.class.getMethod("substring", new Class[] { Integer.TYPE });
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try {
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ReflectionUtils.invokeMethod(substring, new Date());
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fail();
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} catch (RuntimeException e) {
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}
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try {
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ReflectionUtils.invokeMethod(substring, "abc");
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} catch (RuntimeException e) {
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}
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}
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public void testInvokeRuntimeException() throws Exception {
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Method substring = String.class.getMethod("substring", new Class[] { Integer.TYPE });
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try {
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ReflectionUtils.invokeMethod(substring, "abc", new Object[] { new Integer(10) });
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fail();
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} catch (IndexOutOfBoundsException e) {
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}
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}
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public void testInvokeCheckedException() throws Exception {
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Method m = ReflectionUtilsTests.class.getMethod("methodThatThrowsCheckedException", null);
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try {
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ReflectionUtils.invokeMethod(m, null);
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fail();
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} catch (RuntimeException e) {
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}
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}
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public static void methodThatThrowsCheckedException() throws IOException {
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new FileInputStream(new File("bogus"));
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}
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}
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