/* Copyright (c) 2006 Ola Bini
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* $Id: ComposerImpl.java,v 1.1 2006/06/06 19:19:11 olabini Exp $
*/
package org.jvyaml;
import java.io.FileReader;
import java.io.Reader;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import org.jvyaml.events.AliasEvent;
import org.jvyaml.events.Event;
import org.jvyaml.events.NodeEvent;
import org.jvyaml.events.MappingEndEvent;
import org.jvyaml.events.MappingStartEvent;
import org.jvyaml.events.ScalarEvent;
import org.jvyaml.events.SequenceStartEvent;
import org.jvyaml.events.SequenceEndEvent;
import org.jvyaml.events.StreamStartEvent;
import org.jvyaml.events.StreamEndEvent;
import org.jvyaml.nodes.Node;
import org.jvyaml.nodes.ScalarNode;
import org.jvyaml.nodes.SequenceNode;
import org.jvyaml.nodes.MappingNode;
/**
* @author <a href="mailto:ola.bini@ki.se">Ola Bini</a>
* @version $Revision: 1.1 $
*/
public class ComposerImpl implements Composer {
private Parser parser;
private Resolver resolver;
private Map anchors;
public ComposerImpl(final Parser parser, final Resolver resolver) {
this.parser = parser;
this.resolver = resolver;
this.anchors = new HashMap();
}
public boolean checkNode() {
return !(parser.peekEvent() instanceof StreamEndEvent);
}
public Node getNode() {
return checkNode() ? composeDocument() : (Node)null;
}
private class NodeIterator implements Iterator {
public boolean hasNext() {return checkNode();}
public Object next() {return getNode();}
public void remove() {}
}
public Iterator eachNode() {
return new NodeIterator();
}
public Iterator iterator() {
return eachNode();
}
public Node composeDocument() {
if(parser.peekEvent() instanceof StreamStartEvent) {
//Drop STREAM-START event
parser.getEvent();
}
//Drop DOCUMENT-START event
parser.getEvent();
final Node node = composeNode(null,null);
//Drop DOCUMENT-END event
parser.getEvent();
this.anchors.clear();
return node;
}
private final static boolean[] FALS = new boolean[]{false};
private final static boolean[] TRU = new boolean[]{true};
public Node composeNode(final Node parent, final Object index) {
if(parser.peekEvent() instanceof AliasEvent) {
final AliasEvent event = (AliasEvent)parser.getEvent();
final String anchor = event.getAnchor();
if(!anchors.containsKey(anchor)) {
System.err.println(" for aliasEvent: " + event);
throw new ComposerException(null,"found undefined alias " + anchor,null);
}
return (Node)anchors.get(anchor);
}
final Event event = parser.peekEvent();
String anchor = null;
if(event instanceof NodeEvent) {
anchor = ((NodeEvent)event).getAnchor();
}
if(null != anchor) {
if(anchors.containsKey(anchor)) {
throw new ComposerException("found duplicate anchor "+anchor+"; first occurence",null,null);
}
}
resolver.descendResolver(parent,index);
Node node = null;
if(event instanceof ScalarEvent) {
final ScalarEvent ev = (ScalarEvent)parser.getEvent();
String tag = ev.getTag();
if(tag == null || tag.equals("!")) {
tag = resolver.resolve(ScalarNode.class,ev.getValue(),ev.getImplicit());
}
node = new ScalarNode(tag,ev.getValue(),ev.getStyle());
if(null != anchor) {
anchors.put(anchor,node);
}
} else if(event instanceof SequenceStartEvent) {
final SequenceStartEvent start = (SequenceStartEvent)parser.getEvent();
String tag = start.getTag();
if(tag == null || tag.equals("!")) {
tag = resolver.resolve(SequenceNode.class,null,start.getImplicit() ? TRU : FALS);
}
node = new SequenceNode(tag,new ArrayList(),start.getFlowStyle());
if(null != anchor) {
anchors.put(anchor,node);
}
int ix = 0;
while(!(parser.peekEvent() instanceof SequenceEndEvent)) {
((List)node.getValue()).add(composeNode(node,new Integer(ix++)));
}
parser.getEvent();
} else if(event instanceof MappingStartEvent) {
final MappingStartEvent start = (MappingStartEvent)parser.getEvent();
String tag = start.getTag();
if(tag == null || tag.equals("!")) {
tag = resolver.resolve(MappingNode.class,null, start.getImplicit() ? TRU : FALS);
}
node = new MappingNode(tag, new HashMap(), start.getFlowStyle());
if(null != anchor) {
anchors.put(anchor,node);
}
while(!(parser.peekEvent() instanceof MappingEndEvent)) {
final Event key = parser.peekEvent();
final Node itemKey = composeNode(node,null);
if(((Map)node.getValue()).containsKey(itemKey)) {
composeNode(node,itemKey);
} else {
((Map)node.getValue()).put(itemKey,composeNode(node,itemKey));
}
}
parser.getEvent();
}
resolver.ascendResolver();
return node;
}
public static void main(final String[] args) throws Exception {
final String filename = args[0];
System.out.println("Reading of file: \"" + filename + "\"");
final StringBuffer input = new StringBuffer();
final Reader reader = new FileReader(filename);
char[] buff = new char[1024];
int read = 0;
while(true) {
read = reader.read(buff);
input.append(buff,0,read);
if(read < 1024) {
break;
}
}
reader.close();
final String str = input.toString();
final long before = System.currentTimeMillis();
for(int i=0;i<1;i++) {
final Composer cmp = new ComposerImpl(new ParserImpl(new ScannerImpl(str)),new ResolverImpl());
for(final Iterator iter = cmp.eachNode();iter.hasNext();) {
System.out.println(iter.next());
}
}
final long after = System.currentTimeMillis();
final long time = after-before;
final double timeS = (after-before)/1000.0;
System.out.println("Walking through the nodes for the file: " + filename + " took " + time + "ms, or " + timeS + " seconds");
}
}// ComposerImpl