donaldp 2002/11/11 17:22:45
Added: info/src/java/org/apache/avalon/framework/tools/infobuilder
XMLInfoWriter.java
Log:
Add in the first cut of an xml writer
Revision Changes Path
1.1
jakarta-avalon-excalibur/info/src/java/org/apache/avalon/framework/tools/infobuilder/XMLInfoWriter.java
Index: XMLInfoWriter.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.avalon.framework.tools.infobuilder;
import java.io.OutputStream;
import java.io.IOException;
import java.io.Writer;
import java.io.OutputStreamWriter;
import org.apache.avalon.framework.info.ComponentInfo;
import org.apache.avalon.framework.info.ServiceInfo;
import org.apache.avalon.framework.info.ComponentDescriptor;
import org.apache.avalon.framework.info.Attribute;
import org.apache.avalon.framework.info.LoggerDescriptor;
import org.apache.avalon.framework.info.ContextDescriptor;
import org.apache.avalon.framework.info.EntryDescriptor;
import org.apache.avalon.framework.info.ServiceDescriptor;
import org.apache.avalon.framework.info.DependencyDescriptor;
/**
* Write [EMAIL PROTECTED] ComponentInfo} and [EMAIL PROTECTED] ServiceInfo}
objects
* to a stream as xml documents.
*
* @author <a href="mailto:peter at apache.org">Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/11/12 01:22:45 $
*/
public class XMLInfoWriter
implements InfoWriter
{
private static final String CONTEXT_CLASS =
"org.apache.avalon.framework.context.Context";
public void writeServiceInfo( final ServiceInfo info,
final OutputStream outputStream )
throws Exception
{
throw new UnsupportedOperationException();
}
public void writeComponentInfo( final ComponentInfo info,
final OutputStream outputStream )
throws Exception
{
final Writer writer = new OutputStreamWriter( outputStream );
writeHeader( writer );
writeDoctype( writer, "component-info" );
writer.write( "<component-info>" );
writeComponent( writer, info.getComponentDescriptor() );
writeLoggers( writer, info.getLoggers() );
writeContext( writer, info.getContextDescriptor() );
writeServices( writer, info.getServices() );
writeDependencies( writer, info.getDependencies() );
writer.write( "</component-info>" );
writer.flush();
}
private void writeHeader( final Writer writer )
throws IOException
{
writer.write( "<?xml version=\"1.0\" ?>" );
}
private void writeDoctype( final Writer writer,
final String root )
throws IOException
{
final String doctype =
"<!DOCTYPE " + root +
" PUBLIC \"-//AVALON/Component Info DTD Version 1.0//EN\" " +
"\"http://jakarta.apache.org/avalon/dtds/info/componentinfo_1_0.dtd\"; >";
writer.write( doctype );
}
private void writeComponent( final Writer writer,
final ComponentDescriptor component )
throws IOException
{
writer.write( "<component type=\"" );
writer.write( component.getImplementationKey() );
final Attribute[] attributes = component.getAttributes();
if( 0 == attributes.length )
{
writer.write( "\"/>" );
}
else
{
writer.write( "\">" );
writeAttributes( writer, attributes );
writer.write( "</component>" );
}
}
private void writeLoggers( final Writer writer,
final LoggerDescriptor[] loggers )
throws IOException
{
writer.write( "<loggers>" );
for( int i = 0; i < loggers.length; i++ )
{
writeLogger( writer, loggers[ i ] );
}
writer.write( "</loggers>" );
}
private void writeLogger( final Writer writer,
final LoggerDescriptor logger )
throws IOException
{
writer.write( "<logger name=\"" );
writer.write( logger.getName() );
final Attribute[] attributes = logger.getAttributes();
if( 0 == attributes.length )
{
writer.write( "\"/>" );
}
else
{
writer.write( "\">" );
writeAttributes( writer, attributes );
writer.write( "</logger>" );
}
}
private void writeContext( final Writer writer,
final ContextDescriptor context )
throws IOException
{
writer.write( "<context" );
final String type = context.getType();
if( !CONTEXT_CLASS.equals( type ) )
{
writer.write( " type=\"" );
writer.write( type );
writer.write( "\"" );
}
final Attribute[] attributes = context.getAttributes();
final EntryDescriptor[] entrys = context.getEntrys();
if( 0 == attributes.length && 0 == entrys.length )
{
writer.write( "/>" );
}
else
{
writer.write( ">" );
for( int i = 0; i < entrys.length; i++ )
{
writeEntry( writer, entrys[ i ] );
}
writeAttributes( writer, attributes );
}
writer.write( "</context>" );
}
private void writeEntry( final Writer writer,
final EntryDescriptor entry )
throws IOException
{
writer.write( "<entry key=\"" );
writer.write( entry.getKey() );
writer.write( "\" type=\"" );
writer.write( entry.getType() );
if( entry.isOptional() )
{
writer.write( "\" optional=\"true" );
}
final Attribute[] attributes = entry.getAttributes();
if( 0 == attributes.length )
{
writer.write( "\"/>" );
}
else
{
writer.write( "\">" );
writeAttributes( writer, attributes );
writer.write( "</entry>" );
}
}
private void writeServices( final Writer writer,
final ServiceDescriptor[] services )
throws IOException
{
writer.write( "<services>" );
for( int i = 0; i < services.length; i++ )
{
final ServiceDescriptor service = services[ i ];
writer.write( "<service type=\"" );
writer.write( service.getImplementationKey() );
final Attribute[] attributes = service.getAttributes();
if( 0 == attributes.length )
{
writer.write( "\"/>" );
}
else
{
writer.write( "\">" );
writeAttributes( writer, attributes );
writer.write( "</service>" );
}
}
writer.write( "</services>" );
}
private void writeDependencies( final Writer writer,
final DependencyDescriptor[] dependencies
)
throws IOException
{
writer.write( "<dependencies>" );
for( int i = 0; i < dependencies.length; i++ )
{
final DependencyDescriptor dependency = dependencies[ i ];
writer.write( "<dependency " );
if( !dependency.getKey().equals( dependency.getType() ) )
{
writer.write( "key=\"" );
writer.write( dependency.getKey() );
writer.write( "\" " );
}
writer.write( "type=\"" );
writer.write( dependency.getType() );
if( dependency.isOptional() )
{
writer.write( "\" optional=\"true" );
}
final Attribute[] attributes = dependency.getAttributes();
if( 0 == attributes.length )
{
writer.write( "\"/>" );
}
else
{
writer.write( "\">" );
writeAttributes( writer, attributes );
writer.write( "</dependency>" );
}
}
writer.write( "</dependencies>" );
}
private void writeAttributes( final Writer writer,
final Attribute[] attributes )
throws IOException
{
for( int i = 0; i < attributes.length; i++ )
{
writeAttribute( writer, attributes[ i ] );
}
}
private void writeAttribute( final Writer writer,
final Attribute attribute )
throws IOException
{
writer.write( "<attribute name=\"" );
writer.write( attribute.getName() );
writer.write( "\">" );
final String[] names = attribute.getParameterNames();
for( int i = 0; i < names.length; i++ )
{
final String name = names[ i ];
final String value = attribute.getParameter( name );
writer.write( "<param name=\"" );
writer.write( name );
writer.write( "\" value=\"" );
writer.write( value );
writer.write( "\"/>" );
}
writer.write( "</attribute>" );
}
}
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