| 1 |
21
|
jones
|
/**
|
| 2 |
|
|
* Name: BasicElement.java
|
| 3 |
|
|
* Purpose: A Class that represents an XML element and its contents
|
| 4 |
|
|
* Institution: National Center for Ecological Analysis and Synthesis
|
| 5 |
|
|
* Copyright: 2000
|
| 6 |
|
|
* Authors: Matt Jones
|
| 7 |
|
|
*
|
| 8 |
|
|
* Version: '$Id$'
|
| 9 |
|
|
*/
|
| 10 |
|
|
|
| 11 |
|
|
//package project;
|
| 12 |
|
|
|
| 13 |
|
|
import java.io.IOException;
|
| 14 |
|
|
import java.util.Hashtable;
|
| 15 |
|
|
import java.util.Enumeration;
|
| 16 |
|
|
|
| 17 |
31
|
jones
|
/** A Class that represents an XML element and its contents */
|
| 18 |
21
|
jones
|
public class BasicElement {
|
| 19 |
|
|
|
| 20 |
29
|
jones
|
private long element_id;
|
| 21 |
|
|
private String tagname;
|
| 22 |
|
|
private StringBuffer content;
|
| 23 |
|
|
private long parent_id;
|
| 24 |
|
|
private Hashtable attributes;
|
| 25 |
21
|
jones
|
|
| 26 |
31
|
jones
|
/** Construct a Basic Element */
|
| 27 |
23
|
jones
|
public BasicElement () {
|
| 28 |
|
|
content = new StringBuffer();
|
| 29 |
|
|
attributes = new Hashtable();
|
| 30 |
|
|
}
|
| 31 |
|
|
|
| 32 |
31
|
jones
|
/** Construct a Basic Element
|
| 33 |
|
|
*
|
| 34 |
|
|
* @param tagname the name of the element
|
| 35 |
|
|
* @param parent_id the id number of the parent element
|
| 36 |
|
|
*/
|
| 37 |
21
|
jones
|
public BasicElement (String tagname, long parent_id) {
|
| 38 |
23
|
jones
|
this();
|
| 39 |
21
|
jones
|
this.tagname = tagname;
|
| 40 |
|
|
this.parent_id = parent_id;
|
| 41 |
|
|
}
|
| 42 |
|
|
|
| 43 |
31
|
jones
|
/** Construct a Basic Element
|
| 44 |
|
|
*
|
| 45 |
|
|
* @param element_id the id number of the element
|
| 46 |
|
|
* @param tagname the name of the element
|
| 47 |
|
|
* @param parent_id the id number of the parent element
|
| 48 |
|
|
*/
|
| 49 |
21
|
jones
|
public BasicElement (long element_id, String tagname, long parent_id) {
|
| 50 |
|
|
this(tagname,parent_id);
|
| 51 |
|
|
this.element_id = element_id;
|
| 52 |
|
|
}
|
| 53 |
|
|
|
| 54 |
31
|
jones
|
/** convert the element to a string representation for display */
|
| 55 |
21
|
jones
|
public String toString ()
|
| 56 |
|
|
{
|
| 57 |
24
|
jones
|
StringBuffer value = new StringBuffer();
|
| 58 |
|
|
value.append('<');
|
| 59 |
|
|
value.append(getTagName());
|
| 60 |
|
|
value.append(getAttributes().toString());
|
| 61 |
|
|
value.append('>');
|
| 62 |
|
|
// Process children recursively here?
|
| 63 |
|
|
// Or do it in ReaderElement using a stack so we don;t have the
|
| 64 |
|
|
// whole thing in memory at once?
|
| 65 |
|
|
//value.append("</");
|
| 66 |
|
|
//value.append(getTagName());
|
| 67 |
|
|
//value.append('>');
|
| 68 |
|
|
return value.toString();
|
| 69 |
21
|
jones
|
}
|
| 70 |
|
|
|
| 71 |
|
|
/** Get the id of this element */
|
| 72 |
23
|
jones
|
public long getElementID()
|
| 73 |
|
|
{
|
| 74 |
|
|
return element_id;
|
| 75 |
|
|
}
|
| 76 |
21
|
jones
|
|
| 77 |
23
|
jones
|
/** Set the id of this element */
|
| 78 |
|
|
public void setElementID(long element_id)
|
| 79 |
|
|
{
|
| 80 |
|
|
this.element_id = element_id;
|
| 81 |
|
|
}
|
| 82 |
|
|
|
| 83 |
|
|
/** Get the parent id of this element */
|
| 84 |
|
|
public long getParentID()
|
| 85 |
|
|
{
|
| 86 |
|
|
return parent_id;
|
| 87 |
|
|
}
|
| 88 |
|
|
|
| 89 |
|
|
/** Set the parent id of this element */
|
| 90 |
|
|
public void setParentID(long parent_id)
|
| 91 |
|
|
{
|
| 92 |
|
|
this.parent_id = parent_id;
|
| 93 |
|
|
}
|
| 94 |
|
|
|
| 95 |
21
|
jones
|
/** Get the name of this element */
|
| 96 |
23
|
jones
|
public String getTagName()
|
| 97 |
|
|
{
|
| 98 |
|
|
return tagname;
|
| 99 |
|
|
}
|
| 100 |
21
|
jones
|
|
| 101 |
23
|
jones
|
/** Set the tagname of this element */
|
| 102 |
|
|
public void setTagName(String tagname)
|
| 103 |
|
|
{
|
| 104 |
|
|
this.tagname = tagname;
|
| 105 |
|
|
}
|
| 106 |
|
|
|
| 107 |
21
|
jones
|
/** Get the attributes as a string */
|
| 108 |
|
|
public String getAttributes() {
|
| 109 |
|
|
StringBuffer buf = new StringBuffer();
|
| 110 |
|
|
String attName = null;
|
| 111 |
|
|
String attValue = null;
|
| 112 |
|
|
|
| 113 |
|
|
Enumeration attList = attributes.keys();
|
| 114 |
|
|
while (attList.hasMoreElements()) {
|
| 115 |
|
|
attName = (String)attList.nextElement();
|
| 116 |
|
|
attValue = (String)attributes.get(attName);
|
| 117 |
24
|
jones
|
buf.append(" ").append(attName).append("=\"").append(attValue).append("\"");
|
| 118 |
21
|
jones
|
}
|
| 119 |
|
|
return buf.toString();
|
| 120 |
|
|
}
|
| 121 |
|
|
|
| 122 |
|
|
/** Add a new attribute to this element, or set its value */
|
| 123 |
|
|
public void setAttribute(String attName, String attValue) {
|
| 124 |
|
|
if (attName != null) {
|
| 125 |
|
|
// Enter the attribute in the hash table
|
| 126 |
|
|
attributes.put(attName, attValue);
|
| 127 |
|
|
|
| 128 |
|
|
} else {
|
| 129 |
|
|
System.err.println("Attribute name must not be null!");
|
| 130 |
|
|
}
|
| 131 |
|
|
}
|
| 132 |
|
|
|
| 133 |
|
|
/** Get an attribute value by name */
|
| 134 |
|
|
public String getAttribute(String attName) {
|
| 135 |
|
|
return (String)attributes.get(attName);
|
| 136 |
|
|
}
|
| 137 |
|
|
|
| 138 |
|
|
/** Append to the content of the element */
|
| 139 |
|
|
public void appendContent(char[] cbuf, int start, int len) {
|
| 140 |
|
|
this.content.append( cbuf, start, len );
|
| 141 |
|
|
}
|
| 142 |
|
|
|
| 143 |
|
|
/** Append to the content of the element */
|
| 144 |
|
|
public void appendContent(String new_content) {
|
| 145 |
|
|
this.content.append( new_content );
|
| 146 |
|
|
}
|
| 147 |
|
|
|
| 148 |
|
|
/** Get the content of the element */
|
| 149 |
|
|
public String getContent() {
|
| 150 |
|
|
return this.content.toString();
|
| 151 |
|
|
}
|
| 152 |
|
|
}
|