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package org.madore.damlengine;
import java.io.Writer;
import java.io.IOException;
import org.w3c.dom.*;
public final class Unparser {
private Node cursor;
private enum Dir { PUSHING, POPPING };
private Dir dir;
private Writer out;
public Unparser(Document doc, Writer out) {
cursor = doc;
dir = Dir.PUSHING;
this.out = out;
}
protected void skip() {
Node nsib = cursor.getNextSibling();
if ( nsib == null ) {
cursor = cursor.getParentNode();
dir = Dir.POPPING;
} else {
cursor = nsib;
dir = Dir.PUSHING;
}
}
protected void unparseOne()
throws IOException {
switch ( dir ) {
case PUSHING:
if ( cursor.getNodeType() == Node.ELEMENT_NODE ) {
Element elt = (Element)cursor;
out.write("<"+elt.getTagName());
if ( elt.hasAttributes() ) {
NamedNodeMap attrs = elt.getAttributes();
Node n2;
for ( int i=0 ; (n2=attrs.item(i)) != null ; i++ ) {
Attr attr = (Attr)n2;
out.write(" "+attr.getName()
+"=\"(value)\"");
}
}
if ( ! elt.hasChildNodes() ) {
out.write(" />");
skip();
} else {
out.write(">");
cursor = elt.getFirstChild();
}
} else if ( cursor.getNodeType() == Node.DOCUMENT_NODE ) {
cursor = cursor.getFirstChild();
skip();
} else if ( cursor.getNodeType() == Node.TEXT_NODE ) {
out.write("(text)");
skip();
} else if ( cursor.getNodeType() == Node.COMMENT_NODE ) {
out.write("<!--(comment)-->");
skip();
} else if ( cursor.getNodeType() == Node.CDATA_SECTION_NODE ) {
out.write("<![CDATA[(cdata)]]>");
skip();
} else {
out.write("<!--(some other kind of node)-->");
skip();
}
break;
case POPPING:
if ( cursor.getNodeType() == Node.ELEMENT_NODE ) {
Element elt = (Element)cursor;
out.write("</"+elt.getTagName()+">");
}
skip();
break;
}
}
public void unparse()
throws IOException {
while ( cursor != null ) {
unparseOne();
}
}
}
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