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/**
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* '$RCSfile$'
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* Purpose: A Class that represents an XML element and its contents,
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* and can build itself from a database connection
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Matt Jones
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* Release: @release@
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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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*/
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package edu.ucsb.nceas.metacat;
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import java.sql.*;
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import java.io.IOException;
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import java.util.Enumeration;
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import java.util.Iterator;
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import java.util.TreeSet;
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import java.util.Vector;
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/**
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* A Class that represents an XML element and its contents,
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* and can build itself from a database connection
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*/
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public class ElementNode extends BasicNode {
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/**
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* Construct a new ElementNode instance, and recursively create its children
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*
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* @param nodeRecordList the nodedata to use to initialize, which is a
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* TreeSet of NodeRecord objects
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* @param nodeid the identifier for the node to be created
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*/
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public ElementNode (TreeSet nodeRecordList, long nodeid) {
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MetaCatUtil util = new MetaCatUtil();
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// Step through all of the node records we were given
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Iterator it = nodeRecordList.iterator();
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while (it.hasNext()) {
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NodeRecord currentNode = (NodeRecord)it.next();
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if (currentNode.nodeid == nodeid) {
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util.debugMessage("Got Node ID: " + currentNode.nodeid +
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" (" + currentNode.parentnodeid +
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", " + currentNode.nodeindex +
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", " + currentNode.nodetype + ")");
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// Process the current node
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setNodeType(currentNode.nodetype);
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setNodeID(currentNode.nodeid);
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setParentID(currentNode.parentnodeid);
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setTagName(currentNode.nodename);
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} else {
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// Process the children nodes
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if (currentNode.parentnodeid == getNodeID()) {
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util.debugMessage(" Processing child: " + currentNode.nodeid +
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" (" + currentNode.parentnodeid +
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", " + currentNode.nodeindex +
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", " + currentNode.nodetype + ")");
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if ((currentNode.nodetype).equals("ELEMENT")) {
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util.debugMessage("Creating child node: " + currentNode.nodeid);
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ElementNode child = new ElementNode(nodeRecordList,
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currentNode.nodeid);
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addChildNode(child);
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} else if (currentNode.nodetype.equals("ATTRIBUTE")) {
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setAttribute(currentNode.nodename,currentNode.nodedata);
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} else if (currentNode.nodetype.equals("TEXT")) {
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TextNode child = new TextNode(currentNode.nodeid,
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currentNode.parentnodeid,
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currentNode.nodedata);
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addChildNode(child);
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} else if (currentNode.nodetype.equals("COMMENT")) {
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CommentNode child = new CommentNode(currentNode.nodeid,
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currentNode.parentnodeid,
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currentNode.nodedata);
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addChildNode(child);
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} else if (currentNode.nodetype.equals("PI")) {
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PINode child = new PINode(currentNode.nodeid,
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currentNode.parentnodeid,
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currentNode.nodename,
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currentNode.nodedata);
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addChildNode(child);
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}
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} else {
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util.debugMessage(" Discarding child: " + currentNode.nodeid +
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" (" + currentNode.parentnodeid +
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", " + currentNode.nodeindex +
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", " + currentNode.nodetype + ")");
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}
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}
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}
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}
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/**
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* String representation for display purposes (recursively descends through
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* children to create an XML subtree)
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*/
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public String toString () {
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StringBuffer value = new StringBuffer();
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String nodetype = getNodeType();
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if (nodetype.equals("ELEMENT")) {
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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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}
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// Process children recursively here
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BasicNode child = null;
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Enumeration e = getChildren();
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while (e.hasMoreElements()) {
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child = (BasicNode)e.nextElement();
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value.append(child);
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}
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if (nodetype.equals("ELEMENT")) {
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value.append("</");
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value.append(getTagName());
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value.append('>');
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}
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return value.toString();
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}
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}
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