1
|
/**
|
2
|
* Name: BasicNode.java
|
3
|
* Purpose: A Class that represents an XML node and its contents
|
4
|
* Copyright: 2000 Regents of the University of California and the
|
5
|
* National Center for Ecological Analysis and Synthesis
|
6
|
* Authors: Matt Jones
|
7
|
*
|
8
|
* Version: '$Id: BasicNode.java 135 2000-06-08 00:16:35Z jones $'
|
9
|
*/
|
10
|
|
11
|
package edu.ucsb.nceas.metacat;
|
12
|
|
13
|
import java.io.IOException;
|
14
|
import java.util.Hashtable;
|
15
|
import java.util.Enumeration;
|
16
|
import java.util.Vector;
|
17
|
|
18
|
/** A Class that represents an XML node and its contents */
|
19
|
public class BasicNode {
|
20
|
|
21
|
private long node_id;
|
22
|
private String tagname;
|
23
|
private long parent_id;
|
24
|
private Hashtable attributes;
|
25
|
private int childNum;
|
26
|
private int nodeIndex;
|
27
|
private String nodeType;
|
28
|
private Vector children;
|
29
|
|
30
|
/** Construct a Basic Node */
|
31
|
public BasicNode () {
|
32
|
children = new Vector();
|
33
|
attributes = new Hashtable();
|
34
|
this.childNum = 0;
|
35
|
}
|
36
|
|
37
|
/**
|
38
|
* Construct a Basic Node
|
39
|
*
|
40
|
* @param tagname the name of the node
|
41
|
*/
|
42
|
public BasicNode (String tagname) {
|
43
|
this();
|
44
|
this.tagname = tagname;
|
45
|
}
|
46
|
|
47
|
/**
|
48
|
* Construct a Basic Node
|
49
|
*
|
50
|
* @param tagname the name of the node
|
51
|
* @param parent_id the id number of the parent node
|
52
|
* @param nodeIndex - index of node among siblings in parent node
|
53
|
* Every node initializes childNum to 0 when
|
54
|
* created and has interface incChildNum
|
55
|
* when new child is created
|
56
|
*/
|
57
|
public BasicNode (String tagname, long parent_id, int nodeIndex) {
|
58
|
this();
|
59
|
this.tagname = tagname;
|
60
|
this.parent_id = parent_id;
|
61
|
this.nodeIndex = nodeIndex;
|
62
|
}
|
63
|
|
64
|
/** Construct a Basic Node
|
65
|
*
|
66
|
* @param node_id the id number of the node
|
67
|
* @param tagname the name of the node
|
68
|
* @param parent_id the id number of the parent node
|
69
|
*/
|
70
|
public BasicNode (long node_id, String tagname, long parent_id,
|
71
|
int nodeIndex) {
|
72
|
this(tagname,parent_id,nodeIndex);
|
73
|
this.node_id = node_id;
|
74
|
}
|
75
|
|
76
|
/** convert the node to a string representation for display */
|
77
|
/* MAKE THIS AN ABSTRACT METHOD??????
|
78
|
public String toString ()
|
79
|
{
|
80
|
StringBuffer value = new StringBuffer();
|
81
|
value.append('<');
|
82
|
value.append(getTagName());
|
83
|
value.append(getAttributes().toString());
|
84
|
value.append('>');
|
85
|
return value.toString();
|
86
|
}
|
87
|
*/
|
88
|
|
89
|
/** Get the id of this node */
|
90
|
public long getNodeID()
|
91
|
{
|
92
|
return node_id;
|
93
|
}
|
94
|
|
95
|
/** Set the id of this node */
|
96
|
public void setNodeID(long node_id)
|
97
|
{
|
98
|
this.node_id = node_id;
|
99
|
}
|
100
|
|
101
|
/** Get the parent id of this node */
|
102
|
public long getParentID()
|
103
|
{
|
104
|
return parent_id;
|
105
|
}
|
106
|
|
107
|
/** Set the parent id of this node */
|
108
|
public void setParentID(long parent_id)
|
109
|
{
|
110
|
this.parent_id = parent_id;
|
111
|
}
|
112
|
|
113
|
/** Get the name of this node */
|
114
|
public String getTagName()
|
115
|
{
|
116
|
return tagname;
|
117
|
}
|
118
|
|
119
|
/** Set the name of this node */
|
120
|
public void setTagName(String tagname)
|
121
|
{
|
122
|
this.tagname = tagname;
|
123
|
}
|
124
|
|
125
|
/** Get the attributes as a string */
|
126
|
public String getAttributes() {
|
127
|
StringBuffer buf = new StringBuffer();
|
128
|
String attName = null;
|
129
|
String attValue = null;
|
130
|
|
131
|
Enumeration attList = attributes.keys();
|
132
|
while (attList.hasMoreElements()) {
|
133
|
attName = (String)attList.nextElement();
|
134
|
attValue = (String)attributes.get(attName);
|
135
|
buf.append(" ").append(attName).append("=\"");
|
136
|
buf.append(attValue).append("\"");
|
137
|
}
|
138
|
return buf.toString();
|
139
|
}
|
140
|
|
141
|
/** Add a new attribute to this node, or set its value */
|
142
|
public void setAttribute(String attName, String attValue) {
|
143
|
if (attName != null) {
|
144
|
// Enter the attribute in the hash table
|
145
|
attributes.put(attName, attValue);
|
146
|
|
147
|
} else {
|
148
|
System.err.println("Attribute name must not be null!");
|
149
|
}
|
150
|
}
|
151
|
|
152
|
/** Get an attribute value by name */
|
153
|
public String getAttribute(String attName) {
|
154
|
return (String)attributes.get(attName);
|
155
|
}
|
156
|
|
157
|
/** Get nodeIndex of the node */
|
158
|
public int getNodeIndex() {
|
159
|
return this.nodeIndex;
|
160
|
}
|
161
|
|
162
|
/** Set the node index of this node */
|
163
|
public void setNodeIndex(int nodeIndex) {
|
164
|
this.nodeIndex = nodeIndex;
|
165
|
}
|
166
|
|
167
|
/** Get the type of this node */
|
168
|
public String getNodeType() {
|
169
|
return nodeType;
|
170
|
}
|
171
|
|
172
|
/** Set the type of this node */
|
173
|
public void setNodeType(String type) {
|
174
|
this.nodeType = type;
|
175
|
}
|
176
|
|
177
|
/** Add a child node to this node */
|
178
|
public void addChildNode(BasicNode child) {
|
179
|
this.children.add(child);
|
180
|
}
|
181
|
|
182
|
/** Get the an enumeration of the children of this node */
|
183
|
public Enumeration getChildren() {
|
184
|
return children.elements();
|
185
|
}
|
186
|
|
187
|
/** increase childNum when new child for the node is created */
|
188
|
public int incChildNum() {
|
189
|
return ++this.childNum;
|
190
|
}
|
191
|
|
192
|
}
|