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Viewing changes to src/org/apache/stylebook/Project.java

  • Committer: Bazaar Package Importer
  • Author(s): Michael Koch
  • Date: 2007-07-16 07:01:18 UTC
  • Revision ID: james.westby@ubuntu.com-20070716070118-y1rz43swy1w9qosb
Tags: upstream-1.0~b3~svn20061109
Import upstream version 1.0~b3~svn20061109

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src/org/apache/stylebook/Project.java
 
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/*****************************************************************************
 
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 * Copyright (C) 1999 The Apache Software Foundation.   All rights reserved. *
 
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 * ------------------------------------------------------------------------- *
 
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 * This software is published under the terms of the Apache Software License *
 
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 * version 1.1,  a copy of wich has been included  with this distribution in *
 
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 * the LICENSE file.                                                         *
 
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 *****************************************************************************/
 
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package org.apache.stylebook;
 
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import java.io.IOException;
 
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import java.io.OutputStream;
 
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import java.net.URL;
 
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import java.util.Enumeration;
 
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import java.util.Hashtable;
 
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import org.w3c.dom.Document;
 
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import org.w3c.dom.Element;
 
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import org.w3c.dom.Node;
 
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import org.w3c.dom.NodeList;
 
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/**
 
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 *
 
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 *
 
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 * @author <a href="mailto:pier@apache.org">Pierpaolo Fumagalli</a>
 
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 * @author Copyright 1999 &copy; <a href="http://www.apache.org">The Apache
 
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 *         Software Foundation</a>. All rights reserved.
 
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 * @version CVS $Revision: 313221 $ $Date: 1999-12-01 19:39:14 +0100 (ons, 01 dec 1999) $
 
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 */
 
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public class Project {
 
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    private Hashtable entries=new Hashtable();
 
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    private Engine engine=null;
 
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    private URL urlbase=null;
 
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    public Project(Engine engine, Document project, Parameters parambase, URL u)
 
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    throws LoadingException, IOException {
 
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        this.engine=engine;
 
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        this.urlbase=u;
 
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        Element root=project.getDocumentElement();
 
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        if(!root.getTagName().equals("project"))
 
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            throw new LoadingException("Project does not start with <project>");
 
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        NodeList l=root.getChildNodes();
 
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        Parameters parameters=new NodeListParameters(l).merge(parambase);
 
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        processNodeList(l,this.urlbase,parameters);
 
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    }
 
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    private void processNodeList(NodeList l, URL urlbase, Parameters parambase)
 
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    throws LoadingException, IOException {
 
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        for(int x=0;x<l.getLength();x++) {
 
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            if(l.item(x).getNodeType()!=Node.ELEMENT_NODE) continue;
 
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            Element e=(Element)l.item(x);
 
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            String name=e.getTagName();
 
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            if(name.equals("parameter")) continue;
 
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            else if(name.equals("create")) setCreateEntry(e,urlbase,parambase);
 
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            else if(name.equals("resource")) setResourceEntry(e,urlbase);
 
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            else if(name.equals("process")) processEntry(e,urlbase,parambase);
 
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            else throw new LoadingException("Invalid element <"+name+">");
 
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        }
 
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    }
 
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    public Enumeration getEntryNames() {
 
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        return(this.entries.keys());
 
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    }
 
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    public void create(String name, OutputStream out)
 
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    throws IOException, CreationException {
 
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        this.engine.log(this,"Creating \""+name+"\"");
 
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        Entry e=(Entry)this.entries.get(name);
 
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        if(e==null) throw new CreationException("No Entry \""+name+"\"");
 
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        e.create(out);
 
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    }
 
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    private void setCreateEntry(Element e, URL urlbase, Parameters parambase)
 
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    throws LoadingException, IOException {
 
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        URL source=new URL(urlbase,e.getAttribute("source"));
 
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        String target=e.getAttribute("target");
 
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        Entry entry=new BasicEntry(this.engine,source,target,e,parambase);
 
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        Entry old=(Entry)this.entries.put(target,entry);
 
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        if(old!=null) if(!old.equals(entry))
 
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            throw new LoadingException("Duplicate Entry \""+target+"\"");
 
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    }
 
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    private void setResourceEntry(Element e, URL urlbase)
 
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    throws LoadingException, IOException {
 
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        URL source=new URL(urlbase,e.getAttribute("source"));
 
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        String target=e.getAttribute("target");
 
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        Entry entry=new ResourceEntry(this.engine,source,target);
 
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        Entry old=(Entry)this.entries.put(target,entry);
 
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        if(old!=null) if(!old.equals(entry))
 
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            throw new LoadingException("Duplicate Entry \""+target+"\"");
 
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    }
 
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    private void processEntry(Element e, URL urlbase, Parameters parambase)
 
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    throws LoadingException, IOException {
 
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        // Get the producer and the source, create a temporary context
 
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        String prod=e.getAttribute("producer");
 
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        URL source=new URL(urlbase,e.getAttribute("source"));
 
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        CreationContext ctx=new BasicContext(source,"");
 
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        ctx.merge(parambase);
 
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        // Try to load the producer
 
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        this.engine.debug(this,"Processing Source=\""+source+"\" ["+prod+"]");
 
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        Producer producer=this.engine.getProducer(prod);
 
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        if (producer==null)
 
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            throw new LoadingException("Invalid Producer \""+prod+"\"");
 
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        // Get local parameters
 
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        NodeList l=e.getChildNodes();
 
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        ctx.merge(new NodeListParameters(l));
 
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        // Try to create the subproject
 
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        Document doc=null;
 
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        try {        
 
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            // Produce the document
 
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            doc=producer.produce(ctx);
 
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            // For every processor, generate the project
 
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            for(int x=0;x<l.getLength();x++) {
 
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                if(l.item(x).getNodeType()!=Node.ELEMENT_NODE) continue;
 
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                Element el=(Element)l.item(x);
 
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                if(el.getTagName().equals("parameter")) continue;
 
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                if(!el.getTagName().equals("processor"))
 
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                    throw new LoadingException("Invalid <"+el.getTagName()+">");
 
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                Processor proc=this.engine.getProcessor(el.getAttribute("name"));
 
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                if(proc==null)
 
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                        throw new LoadingException("No Processr \""+proc+"\"");
 
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                Parameters p=new NodeListParameters(el.getChildNodes()).merge(ctx);
 
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                doc=proc.process(doc,ctx,p);
 
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            }
 
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        } catch (CreationException x) {
 
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            x.printStackTrace(System.out);
 
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            throw new LoadingException("Processing Entry ("+x.getMessage()+")");
 
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        }
 
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        // Check for proper document
 
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        if (doc==null) return;
 
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        // Do as a top-level project recursively
 
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        Element root=doc.getDocumentElement();
 
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        if(!root.getTagName().equals("project"))
 
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            throw new LoadingException("Result of process is not <project>");
 
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        l=root.getChildNodes();
 
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        Parameters p=new NodeListParameters(l).merge(ctx);
 
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        processNodeList(l,source,p);
 
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    }
 
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}