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17 package org.apache.commons.jxpath.ri.model.beans;
18
19 import java.util.Locale;
20
21 import org.apache.commons.jxpath.JXPathContext;
22 import org.apache.commons.jxpath.JXPathIntrospector;
23 import org.apache.commons.jxpath.ri.Compiler;
24 import org.apache.commons.jxpath.ri.QName;
25 import org.apache.commons.jxpath.ri.compiler.NodeNameTest;
26 import org.apache.commons.jxpath.ri.compiler.NodeTest;
27 import org.apache.commons.jxpath.ri.compiler.NodeTypeTest;
28 import org.apache.commons.jxpath.ri.model.NodeIterator;
29 import org.apache.commons.jxpath.ri.model.NodePointer;
30 import org.apache.commons.jxpath.util.ValueUtils;
31
32
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38 public class CollectionPointer extends NodePointer {
39 private Object collection;
40 private NodePointer valuePointer;
41
42 private static final long serialVersionUID = 8620254915563256588L;
43
44
45
46
47
48
49 public CollectionPointer(Object collection, Locale locale) {
50 super(null, locale);
51 this.collection = collection;
52 }
53
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57
58
59 public CollectionPointer(NodePointer parent, Object collection) {
60 super(parent);
61 this.collection = collection;
62 }
63
64 public QName getName() {
65 return null;
66 }
67
68 public Object getBaseValue() {
69 return collection;
70 }
71
72 public boolean isCollection() {
73 return true;
74 }
75
76 public int getLength() {
77 return ValueUtils.getLength(getBaseValue());
78 }
79
80 public boolean isLeaf() {
81 Object value = getNode();
82 return value == null || JXPathIntrospector.getBeanInfo(value.getClass()).isAtomic();
83 }
84
85 public boolean isContainer() {
86 return index != WHOLE_COLLECTION;
87 }
88
89 public Object getImmediateNode() {
90 return index == WHOLE_COLLECTION ? ValueUtils.getValue(collection)
91 : ValueUtils.getValue(collection, index);
92 }
93
94 public void setValue(Object value) {
95 if (index == WHOLE_COLLECTION) {
96 parent.setValue(value);
97 }
98 else {
99 ValueUtils.setValue(collection, index, value);
100 }
101 }
102
103 public void setIndex(int index) {
104 super.setIndex(index);
105 valuePointer = null;
106 }
107
108 public NodePointer getValuePointer() {
109 if (valuePointer == null) {
110 if (index == WHOLE_COLLECTION) {
111 valuePointer = this;
112 }
113 else {
114 Object value = getImmediateNode();
115 valuePointer =
116 NodePointer.newChildNodePointer(this, getName(), value);
117 }
118 }
119 return valuePointer;
120 }
121
122 public NodePointer createPath(JXPathContext context) {
123 if (ValueUtils.getLength(getBaseValue()) <= index) {
124 collection = ValueUtils.expandCollection(getNode(), index + 1);
125 }
126 return this;
127 }
128
129 public NodePointer createPath(JXPathContext context, Object value) {
130 NodePointer ptr = createPath(context);
131 ptr.setValue(value);
132 return ptr;
133 }
134
135 public NodePointer createChild(
136 JXPathContext context,
137 QName name,
138 int index,
139 Object value) {
140 NodePointer ptr = (NodePointer) clone();
141 ptr.setIndex(index);
142 return ptr.createPath(context, value);
143 }
144
145 public NodePointer createChild(
146 JXPathContext context,
147 QName name,
148 int index) {
149 NodePointer ptr = (NodePointer) clone();
150 ptr.setIndex(index);
151 return ptr.createPath(context);
152 }
153
154 public int hashCode() {
155 return System.identityHashCode(collection) + index;
156 }
157
158 public boolean equals(Object object) {
159 if (object == this) {
160 return true;
161 }
162
163 if (!(object instanceof CollectionPointer)) {
164 return false;
165 }
166
167 CollectionPointer other = (CollectionPointer) object;
168 return collection == other.collection && index == other.index;
169 }
170
171 public NodeIterator childIterator(NodeTest test,
172 boolean reverse, NodePointer startWith) {
173 if (index == WHOLE_COLLECTION) {
174 return new CollectionChildNodeIterator(
175 this,
176 test,
177 reverse,
178 startWith);
179 }
180 return getValuePointer().childIterator(test, reverse, startWith);
181 }
182
183 public NodeIterator attributeIterator(QName name) {
184 return index == WHOLE_COLLECTION ? new CollectionAttributeNodeIterator(this, name)
185 : getValuePointer().attributeIterator(name);
186 }
187
188 public NodeIterator namespaceIterator() {
189 return index == WHOLE_COLLECTION ? null : getValuePointer().namespaceIterator();
190 }
191
192 public NodePointer namespacePointer(String namespace) {
193 return index == WHOLE_COLLECTION ? null : getValuePointer().namespacePointer(namespace);
194 }
195
196 public boolean testNode(NodeTest test) {
197 if (index == WHOLE_COLLECTION) {
198 if (test == null) {
199 return true;
200 }
201 if (test instanceof NodeNameTest) {
202 return false;
203 }
204 return test instanceof NodeTypeTest && ((NodeTypeTest) test).getNodeType() == Compiler.NODE_TYPE_NODE;
205 }
206 return getValuePointer().testNode(test);
207 }
208
209 public int compareChildNodePointers(
210 NodePointer pointer1, NodePointer pointer2) {
211 return pointer1.getIndex() - pointer2.getIndex();
212 }
213
214 public String asPath() {
215 StringBuffer buffer = new StringBuffer();
216 NodePointer parent = getImmediateParentPointer();
217 if (parent != null) {
218 buffer.append(parent.asPath());
219 if (index != WHOLE_COLLECTION) {
220
221 if (parent.getIndex() != WHOLE_COLLECTION) {
222 buffer.append("/.");
223 }
224 buffer.append("[").append(index + 1).append(']');
225 }
226 }
227 else {
228 if (index != WHOLE_COLLECTION) {
229 buffer.append("/.[").append(index + 1).append(']');
230 }
231 else {
232 buffer.append("/");
233 }
234 }
235 return buffer.toString();
236 }
237 }