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/**
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* Name: BasicElement.java
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* Purpose: A Class that represents an XML element and its contents
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* Institution: National Center for Ecological Analysis and Synthesis
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* Copyright: 2000
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* Authors: Matt Jones
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*
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* Version: '$Id$'
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*/
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//package project;
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import java.io.IOException;
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import java.util.Hashtable;
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import java.util.Enumeration;
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public class BasicElement {
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protected long element_id;
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protected String tagname;
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protected StringBuffer content;
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protected long parent_id;
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protected Hashtable attributes;
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public BasicElement () {
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content = new StringBuffer();
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attributes = new Hashtable();
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}
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public BasicElement (String tagname, long parent_id) {
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this();
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this.tagname = tagname;
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this.parent_id = parent_id;
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}
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public BasicElement (long element_id, String tagname, long parent_id) {
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this(tagname,parent_id);
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this.element_id = element_id;
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}
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// used by JTree to display this node
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public String toString ()
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{
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StringBuffer value = new StringBuffer();
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value.append('<');
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value.append(getTagName());
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value.append(getAttributes().toString());
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value.append('>');
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// Process children recursively here?
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// Or do it in ReaderElement using a stack so we don;t have the
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// whole thing in memory at once?
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//value.append("</");
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//value.append(getTagName());
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//value.append('>');
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return value.toString();
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}
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/** Get the id of this element */
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public long getElementID()
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{
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return element_id;
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}
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/** Set the id of this element */
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public void setElementID(long element_id)
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{
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this.element_id = element_id;
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}
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/** Get the parent id of this element */
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public long getParentID()
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{
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return parent_id;
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}
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/** Set the parent id of this element */
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public void setParentID(long parent_id)
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{
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this.parent_id = parent_id;
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}
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/** Get the name of this element */
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public String getTagName()
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{
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return tagname;
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}
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/** Set the tagname of this element */
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public void setTagName(String tagname)
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{
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this.tagname = tagname;
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}
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/** Get the attributes as a string */
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public String getAttributes() {
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StringBuffer buf = new StringBuffer();
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String attName = null;
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String attValue = null;
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Enumeration attList = attributes.keys();
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while (attList.hasMoreElements()) {
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attName = (String)attList.nextElement();
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attValue = (String)attributes.get(attName);
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buf.append(" ").append(attName).append("=\"").append(attValue).append("\"");
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}
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return buf.toString();
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}
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/** Add a new attribute to this element, or set its value */
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public void setAttribute(String attName, String attValue) {
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if (attName != null) {
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// Enter the attribute in the hash table
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attributes.put(attName, attValue);
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} else {
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System.err.println("Attribute name must not be null!");
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}
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}
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/** Get an attribute value by name */
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public String getAttribute(String attName) {
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return (String)attributes.get(attName);
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}
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/** Append to the content of the element */
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public void appendContent(char[] cbuf, int start, int len) {
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this.content.append( cbuf, start, len );
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}
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/** Append to the content of the element */
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public void appendContent(String new_content) {
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this.content.append( new_content );
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}
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/** Get the content of the element */
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public String getContent() {
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return this.content.toString();
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}
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}
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