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/**
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* '$RCSfile$'
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* Purpose: A Class that represents an XML node and its contents
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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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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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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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import java.util.Vector;
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/** A Class that represents an XML node and its contents */
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public class BasicNode {
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private long node_id;
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private String tagname;
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private long parent_id;
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private long rootnode_id;
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private String doc_id;
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private Hashtable attributes;
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private Hashtable namespace;
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private int childNum;
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private int nodeIndex;
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private String nodeType;
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private Vector children;
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/** Construct a Basic Node */
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public BasicNode () {
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children = new Vector();
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attributes = new Hashtable();
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namespace = new Hashtable();
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this.childNum = 0;
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}
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/**
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* Construct a Basic Node
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*
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* @param tagname the name of the node
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*/
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public BasicNode (String tagname) {
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this();
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this.tagname = tagname;
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}
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/**
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* Construct a Basic Node
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*
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* @param tagname the name of the node
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* @param parent_id the id number of the parent node
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* @param nodeIndex - index of node among siblings in parent node
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* Every node initializes childNum to 0 when
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* created and has interface incChildNum
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* when new child is created
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*/
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public BasicNode (String tagname, long parent_id, int nodeIndex) {
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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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this.nodeIndex = nodeIndex;
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}
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/** Construct a Basic Node
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*
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* @param node_id the id number of the node
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* @param tagname the name of the node
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* @param parent_id the id number of the parent node
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*/
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public BasicNode (long node_id, String tagname, long parent_id,
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int nodeIndex) {
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this(tagname,parent_id,nodeIndex);
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this.node_id = node_id;
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}
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/** convert the node to a string representation for display */
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/* MAKE THIS AN ABSTRACT METHOD??????
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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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return value.toString();
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}
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*/
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/** Get the id of this node */
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public long getNodeID()
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{
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return node_id;
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}
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/** Set the id of this node */
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public void setNodeID(long node_id)
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{
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this.node_id = node_id;
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}
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/** Get the parent id of this node */
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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 node */
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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 root node id of this node */
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public long getRootNodeID()
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{
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return rootnode_id;
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}
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/** Set the root node id of this node */
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public void setRootNodeID(long rootnode_id)
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{
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this.rootnode_id = rootnode_id;
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}
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/** Get the doc id of this node */
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public String getDocID()
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{
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return doc_id;
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}
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/** Set the doc id of this node */
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public void setDocID(String doc_id)
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{
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this.doc_id = doc_id;
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}
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/** Get the name of this node */
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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 name of this node */
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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("=\"");
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buf.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 node, 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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/** Add a namespace to this node */
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public void setNamespace(String prefix, String uri) {
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if (prefix != null) {
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// Enter the namespace in the hash table
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namespace.put(prefix, uri);
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} else {
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System.err.println("Namespace prefix must not be null!");
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}
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}
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/** Get an uri of the namespace prefix */
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public String getNamespace(String prefix) {
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return (String)namespace.get(prefix);
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}
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/** Get nodeIndex of the node */
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public int getNodeIndex() {
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return this.nodeIndex;
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}
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/** Set the node index of this node */
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public void setNodeIndex(int nodeIndex) {
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this.nodeIndex = nodeIndex;
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}
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/** Get the type of this node */
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public String getNodeType() {
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return nodeType;
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}
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/** Set the type of this node */
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public void setNodeType(String type) {
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this.nodeType = type;
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}
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/** Add a child node to this node */
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public void addChildNode(BasicNode child) {
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this.children.add(child);
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}
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/** Get the an enumeration of the children of this node */
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public Enumeration getChildren() {
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return children.elements();
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}
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/** increase childNum when new child for the node is created */
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public int incChildNum() {
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return ++this.childNum;
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}
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}
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