1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.shared.trace;
20
21 import java.util.Iterator;
22 import java.util.logging.Level;
23 import java.util.logging.Logger;
24
25 /**
26 * Trace method calls to an iterator
27 */
28 public class TracingIterator<E> implements Iterator<E>
29 {
30 private final Iterator<E> _iterator;
31
32 private final TracingSupport _tracer;
33
34 public TracingIterator(Iterator<E> iterator)
35 {
36 _iterator = iterator;
37 _tracer = new TracingSupport(iterator.getClass());
38 }
39
40 public static <E> TracingIterator<E> create(Iterator<E> iterator)
41 {
42 return new TracingIterator<E>(iterator);
43 }
44
45 /**
46 * @return the iterator
47 */
48 public Iterator<E> getIterator()
49 {
50 return _iterator;
51 }
52
53 public boolean hasNext()
54 {
55 return _tracer.trace("hasNext", new Closure<Boolean>()
56 {
57 public Boolean call()
58 {
59 return _iterator.hasNext();
60 }
61 });
62 }
63
64 public E next()
65 {
66 return _tracer.trace("next", new Closure<E>()
67 {
68 public E call()
69 {
70 return _iterator.next();
71 }
72 });
73 }
74
75 public void remove()
76 {
77 _tracer.trace("remove", new Closure<Object>()
78 {
79 public Object call()
80 {
81 _iterator.remove();
82 return Void.class;
83 }
84 });
85 }
86
87 /**
88 * @return
89 * @see org.apache.myfaces.shared.trace.TracingSupport#getLevel()
90 */
91 public Level getLevel()
92 {
93 return _tracer.getLevel();
94 }
95
96 /**
97 * @return
98 * @see org.apache.myfaces.shared.trace.TracingSupport#getLogger()
99 */
100 public Logger getLogger()
101 {
102 return _tracer.getLogger();
103 }
104
105 /**
106 * @return
107 * @see org.apache.myfaces.shared.trace.TracingSupport#getSourceClass()
108 */
109 public String getSourceClass()
110 {
111 return _tracer.getSourceClass();
112 }
113
114 /**
115 * @param level
116 * @see org.apache.myfaces.shared.trace.TracingSupport#setLevel(java.util.logging.Level)
117 */
118 public void setLevel(Level level)
119 {
120 _tracer.setLevel(level);
121 }
122
123 /**
124 * @param logger
125 * @see org.apache.myfaces.shared.trace.TracingSupport#setLogger(java.util.logging.Logger)
126 */
127 public void setLogger(Logger logger)
128 {
129 _tracer.setLogger(logger);
130 }
131
132 /**
133 * @param className
134 * @see org.apache.myfaces.shared.trace.TracingSupport#setSourceClass(java.lang.String)
135 */
136 public void setSourceClass(String className)
137 {
138 _tracer.setSourceClass(className);
139 }
140 }