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1 package org.xmldb.xupdate.lexus.commands;
2
3
55
56 import org.w3c.dom.Attr  ;
57 import org.w3c.dom.Element ;
58 import org.w3c.dom.NamedNodeMap ;
59 import org.w3c.dom.Node ;
60
61 import java.util.Hashtable ;
62
63
68 public abstract class InsertCommand extends CommandObject {
69
70
71 private Node current = null;
72
73 protected Node result = null;
74
75 private int state = -1;
76
77 private InsertStates[] states = null;
78
79 private static final int STATE_COUNT = 7;
80
81
84 public InsertCommand(Node contextNode) throws Exception {
85 super(contextNode);
86 states = new InsertStates[STATE_COUNT];
87 states[0] = new InsertElement();
88 states[1] = new InsertAttribute();
89 states[2] = new InsertComment();
90 states[3] = new InsertText();
91 states[4] = new InsertCDATA();
92 states[5] = new InsertProcessingInstruction();
93 states[6] = new InsertVariable();
94 }
95
96
97
100 public void submitAttributes(Hashtable attributes) {
101 if (state < 0) {
102 super.submitAttributes(attributes);
103 } else {
104 states[state].submitAttributes(attributes);
105 }
106 }
107
108
109
112 public void submitCharacters(String data) {
113 if (state < 0) {
114 super.submitCharacters(data);
115 } else {
116 states[state].submitCharacters(data);
117 }
118 }
119
120
121
124 public boolean submitInstruction(int instruction) throws Exception {
125 if (result == null) {
126 result = document.createElementNS(null, "temporaryXUpdateTree");
127 current = result;
128 document.getDocumentElement().appendChild(result);
129 }
130 if (state >= 0) {
131 current = states[state].execute(current);
132 }
133 switch (instruction) {
134 case CommandConstants.INSTRUCTION_ELEMENT:
135 state = 0;
136 break;
137 case CommandConstants.INSTRUCTION_ATTRIBUTE:
138 state = 1;
139 break;
140 case CommandConstants.INSTRUCTION_COMMENT:
141 state = 2;
142 break;
143 case CommandConstants.INSTRUCTION_TEXT:
144 state = 3;
145 break;
146 case CommandConstants.INSTRUCTION_CDATA:
147 state = 4;
148 break;
149 case CommandConstants.INSTRUCTION_PROCESSING_INSTRUCTION:
150 state = 5;
151 break;
152 case CommandConstants.INSTRUCTION_VALUE_OF:
153 state = 6;
154 break;
155 default:
156 state = -1;
157 }
158 if (state >= 0) {
159 states[state].reset();
160 }
161 return state >= 0;
162 }
163
164
165
168 public boolean executeInstruction() throws Exception {
169 if (state >= 0) {
170 current = states[state].execute(current);
171 state = -1;
172 }
173 if (!current.equals(result)) {
174 switch (current.getNodeType()) {
175 case Node.ATTRIBUTE_NODE:
176 current = ((Attr ) current).getOwnerElement();
177 return true;
178 default:
179 current = current.getParentNode();
180 return true;
181 }
182 }
183 return false;
184 }
185
186
187
190 protected void insertAttributes(NamedNodeMap attributes, Node node) throws Exception {
191 if (attributes == null) {
192 return;
193 }
194 if (node.getNodeType() != Node.ELEMENT_NODE) {
195 throw new Exception ("can't append attribute to !");
196 }
197 int attributesLength = attributes.getLength();
198 for (int j = 0; j < attributesLength; j++) {
199 Attr attribute = (Attr ) attributes.item(j);
200 String namespaceURI = attribute.getNamespaceURI();
201 ((Element ) node).setAttributeNS(namespaceURI, attribute.getNodeName(), attribute.getNodeValue());
202 }
203 }
204
205
206
209 public abstract Node execute() throws Exception ;
210 }
211
212 |
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