1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27 package org.apache.http.impl.execchain;
28
29 import java.io.OutputStream;
30 import java.lang.reflect.InvocationHandler;
31 import java.lang.reflect.InvocationTargetException;
32 import java.lang.reflect.Method;
33
34 import org.apache.http.HttpEntity;
35 import org.apache.http.annotation.NotThreadSafe;
36
37 /**
38 * A wrapper class for {@link HttpEntity} enclosed in a request message.
39 *
40 * @since 4.3
41 */
42 @NotThreadSafe
43 class RequestEntityExecHandler implements InvocationHandler {
44
45 private static final Method WRITE_TO_METHOD;
46
47 static {
48 try {
49 WRITE_TO_METHOD = HttpEntity.class.getMethod("writeTo", OutputStream.class);
50 } catch (final NoSuchMethodException ex) {
51 throw new Error(ex);
52 }
53 }
54
55 private final HttpEntity original;
56 private boolean consumed = false;
57
58 RequestEntityExecHandler(final HttpEntity original) {
59 super();
60 this.original = original;
61 }
62
63 public HttpEntity getOriginal() {
64 return original;
65 }
66
67 public boolean isConsumed() {
68 return consumed;
69 }
70
71 public Object invoke(
72 final Object proxy, final Method method, final Object[] args) throws Throwable {
73 try {
74 if (method.equals(WRITE_TO_METHOD)) {
75 this.consumed = true;
76 }
77 return method.invoke(original, args);
78 } catch (final InvocationTargetException ex) {
79 final Throwable cause = ex.getCause();
80 if (cause != null) {
81 throw cause;
82 } else {
83 throw ex;
84 }
85 }
86 }
87
88 }