|
1
23
24 package com.sun.el.parser;
25
26 import javax.el.ELException;
27 import javax.el.MethodInfo;
28 import javax.el.PropertyNotWritableException;
29
30 import com.sun.el.lang.ELSupport;
31 import com.sun.el.lang.EvaluationContext;
32 import com.sun.el.util.MessageFactory;
33
34
38 public abstract class SimpleNode extends ELSupport implements Node {
39 protected Node parent;
40
41 protected Node[] children;
42
43 protected int id;
44
45 protected String  image;
46
47 public SimpleNode(int i) {
48 id = i;
49 }
50
51 public void jjtOpen() {
52 }
53
54 public void jjtClose() {
55 }
56
57 public void jjtSetParent(Node n) {
58 parent = n;
59 }
60
61 public Node jjtGetParent() {
62 return parent;
63 }
64
65 public void jjtAddChild(Node n, int i) {
66 if (children == null) {
67 children = new Node[i + 1];
68 } else if (i >= children.length) {
69 Node c[] = new Node[i + 1];
70 System.arraycopy(children, 0, c, 0, children.length);
71 children = c;
72 }
73 children[i] = n;
74 }
75
76 public Node jjtGetChild(int i) {
77 return children[i];
78 }
79
80 public int jjtGetNumChildren() {
81 return (children == null) ? 0 : children.length;
82 }
83
84
90
91 public String toString() {
92 if (this.image != null) {
93 return ELParserTreeConstants.jjtNodeName[id] + "[" + this.image
94 + "]";
95 }
96 return ELParserTreeConstants.jjtNodeName[id];
97 }
98
99 public String toString(String prefix) {
100 return prefix + toString();
101 }
102
103
107
108 public void dump(String prefix) {
109 System.out.println(toString(prefix));
110 if (children != null) {
111 for (int i = 0; i < children.length; ++i) {
112 SimpleNode n = (SimpleNode) children[i];
113 if (n != null) {
114 n.dump(prefix + " ");
115 }
116 }
117 }
118 }
119
120 public String getImage() {
121 return image;
122 }
123
124 public void setImage(String image) {
125 this.image = image;
126 }
127
128 public Class getType(EvaluationContext ctx)
129 throws ELException {
130 throw new UnsupportedOperationException ();
131 }
132
133 public Object getValue(EvaluationContext ctx)
134 throws ELException {
135 throw new UnsupportedOperationException ();
136 }
137
138 public boolean isReadOnly(EvaluationContext ctx)
139 throws ELException {
140 return true;
141 }
142
143 public void setValue(EvaluationContext ctx, Object value)
144 throws ELException {
145 throw new PropertyNotWritableException(MessageFactory.get("error.syntax.set"));
146 }
147
148 public void accept(NodeVisitor visitor) throws ELException {
149 visitor.visit(this);
150 if (this.children != null && this.children.length > 0) {
151 for (int i = 0; i < this.children.length; i++) {
152 this.children[i].accept(visitor);
153 }
154 }
155 }
156
157 public Object invoke(EvaluationContext ctx, Class [] paramTypes, Object [] paramValues) throws ELException {
158 throw new UnsupportedOperationException ();
159 }
160
161 public MethodInfo getMethodInfo(EvaluationContext ctx, Class [] paramTypes) throws ELException {
162 throw new UnsupportedOperationException ();
163 }
164 }
165 |
Popular Tags |
Java API By Example, From Geeks To Geeks.