1 /*
2 * Copyright 2005 John G. Wilson
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17
18 package groovy.util.slurpersupport;
19
20 import groovy.lang.Closure;
21 import groovy.lang.GroovyObject;
22 import groovy.lang.GroovyRuntimeException;
23
24 import java.io.IOException;
25 import java.io.Writer;
26 import java.util.Iterator;
27 import java.util.Map;
28
29 /***
30 * @author John Wilson
31 *
32 */
33
34 public class NoChildren extends GPathResult {
35 /***
36 * @param parent
37 * @param name
38 */
39 public NoChildren(final GPathResult parent, final String name, final Map namespaceTagHints) {
40 super(parent, name, "*", namespaceTagHints);
41 }
42
43 /* (non-Javadoc)
44 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#size()
45 */
46 public int size() {
47 return 0;
48 }
49
50 /* (non-Javadoc)
51 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#text()
52 */
53 public String text() {
54 return "";
55 }
56
57 /* (non-Javadoc)
58 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#parents()
59 */
60 public GPathResult parents() {
61 // TODO Auto-generated method stub
62 throw new GroovyRuntimeException("parents() not implemented yet");
63 }
64
65 /* (non-Javadoc)
66 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#childNodes()
67 */
68 public Iterator childNodes() {
69 return iterator();
70 }
71
72 /* (non-Javadoc)
73 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#iterator()
74 */
75 public Iterator iterator() {
76 return new Iterator() {
77 public boolean hasNext() {
78 return false;
79 }
80
81 public Object next() {
82 return null;
83 }
84
85 public void remove() {
86 throw new UnsupportedOperationException();
87 }
88 };
89 }
90
91 /* (non-Javadoc)
92 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#find(groovy.lang.Closure)
93 */
94 public GPathResult find(final Closure closure) {
95 return this;
96 }
97
98 /* (non-Javadoc)
99 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#findAll(groovy.lang.Closure)
100 */
101 public GPathResult findAll(final Closure closure) {
102 return this;
103 }
104
105 /* (non-Javadoc)
106 * @see org.codehaus.groovy.sandbox.util.slurpersupport.GPathResult#nodeIterator()
107 */
108 public Iterator nodeIterator() {
109 return iterator();
110 }
111
112 /* (non-Javadoc)
113 * @see groovy.lang.Writable#writeTo(java.io.Writer)
114 */
115 public Writer writeTo(final Writer out) throws IOException {
116 return out;
117 }
118
119 /* (non-Javadoc)
120 * @see org.codehaus.groovy.sandbox.markup.Buildable#build(groovy.lang.GroovyObject)
121 */
122 public void build(final GroovyObject builder) {
123 }
124
125 protected void replaceNode(final Closure newValue) {
126 // No elements match GPath expression - do nothing
127 }
128
129 protected void replaceBody(final Object newValue) {
130 // No elements match GPath expression - do nothing
131 }
132
133 protected void appendNode(final Object newValue) {
134 // TODO consider creating an element for this
135 }
136 }