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1
2
3 package org.apache.el.parser;
4
5 import javax.el.ELException;
6 import javax.el.MethodInfo;
7 import javax.el.PropertyNotWritableException;
8
9 import org.apache.el.lang.ELSupport;
10 import org.apache.el.lang.EvaluationContext;
11 import org.apache.el.util.MessageFactory;
12
13
14
18 public abstract class SimpleNode extends ELSupport implements Node {
19 protected Node parent;
20
21 protected Node[] children;
22
23 protected int id;
24
25 protected String  image;
26
27 public SimpleNode(int i) {
28 id = i;
29 }
30
31 public void jjtOpen() {
32 }
33
34 public void jjtClose() {
35 }
36
37 public void jjtSetParent(Node n) {
38 parent = n;
39 }
40
41 public Node jjtGetParent() {
42 return parent;
43 }
44
45 public void jjtAddChild(Node n, int i) {
46 if (children == null) {
47 children = new Node[i + 1];
48 } else if (i >= children.length) {
49 Node c[] = new Node[i + 1];
50 System.arraycopy(children, 0, c, 0, children.length);
51 children = c;
52 }
53 children[i] = n;
54 }
55
56 public Node jjtGetChild(int i) {
57 return children[i];
58 }
59
60 public int jjtGetNumChildren() {
61 return (children == null) ? 0 : children.length;
62 }
63
64
70
71 public String toString() {
72 if (this.image != null) {
73 return ELParserTreeConstants.jjtNodeName[id] + "[" + this.image
74 + "]";
75 }
76 return ELParserTreeConstants.jjtNodeName[id];
77 }
78
79 public String toString(String prefix) {
80 return prefix + toString();
81 }
82
83
87
88 public void dump(String prefix) {
89 System.out.println(toString(prefix));
90 if (children != null) {
91 for (int i = 0; i < children.length; ++i) {
92 SimpleNode n = (SimpleNode) children[i];
93 if (n != null) {
94 n.dump(prefix + " ");
95 }
96 }
97 }
98 }
99
100 public String getImage() {
101 return image;
102 }
103
104 public void setImage(String image) {
105 this.image = image;
106 }
107
108 public Class getType(EvaluationContext ctx)
109 throws ELException {
110 throw new UnsupportedOperationException ();
111 }
112
113 public Object getValue(EvaluationContext ctx)
114 throws ELException {
115 throw new UnsupportedOperationException ();
116 }
117
118 public boolean isReadOnly(EvaluationContext ctx)
119 throws ELException {
120 return true;
121 }
122
123 public void setValue(EvaluationContext ctx, Object value)
124 throws ELException {
125 throw new PropertyNotWritableException(MessageFactory.get("error.syntax.set"));
126 }
127
128 public void accept(NodeVisitor visitor) throws Exception {
129 visitor.visit(this);
130 if (this.children != null && this.children.length > 0) {
131 for (int i = 0; i < this.children.length; i++) {
132 this.children[i].accept(visitor);
133 }
134 }
135 }
136
137 public Object invoke(EvaluationContext ctx, Class [] paramTypes, Object [] paramValues) throws ELException {
138 throw new UnsupportedOperationException ();
139 }
140
141 public MethodInfo getMethodInfo(EvaluationContext ctx, Class [] paramTypes) throws ELException {
142 throw new UnsupportedOperationException ();
143 }
144 }
145 |
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