/*
* Copyright 2005 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.compiler.compiler.xml.rules;
import org.drools.compiler.lang.descr.FunctionImportDescr;
import org.drools.compiler.lang.descr.GlobalDescr;
import org.drools.compiler.lang.descr.ImportDescr;
import org.drools.compiler.lang.descr.PackageDescr;
import org.drools.core.xml.BaseAbstractHandler;
import org.drools.core.xml.ExtensibleXmlParser;
import org.drools.core.xml.Handler;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
*
* TODO To change the template for this generated type comment go to Window -
* Preferences - Java - Code Style - Code Templates
*/
public class PackageHandler extends BaseAbstractHandler
implements
Handler {
public PackageHandler() {
}
public Object start(final String uri,
final String localName,
final Attributes attrs,
final ExtensibleXmlParser parser) throws SAXException {
parser.startElementBuilder( localName,
attrs );
final String ruleSetName = attrs.getValue( "name" );
if ( ruleSetName == null || ruleSetName.trim().equals( "" ) ) {
throw new SAXParseException( "<package> requires a 'name' attribute",
parser.getLocator() );
}
final PackageDescr packageDescr = new PackageDescr( ruleSetName.trim() );
parser.setData( packageDescr );
return packageDescr;
}
public Object end(final String uri,
final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final PackageDescr packageDescr = ( PackageDescr ) parser.getData();
final Element element = parser.endElementBuilder();
NodeList imports = element.getElementsByTagName( "import" );
for ( int i = 0, length = imports.getLength(); i < length; i++ ) {
final String importEntry = ((Element)imports.item(i)).getAttribute( "name" );
if ( importEntry == null || importEntry.trim().equals( "" ) ) {
throw new SAXParseException( "<import> cannot be blank",
parser.getLocator() );
}
packageDescr.addImport( new ImportDescr( importEntry ) );
}
NodeList importfunctions = element.getElementsByTagName( "importfunction" );
for ( int i = 0, length = importfunctions.getLength(); i < length; i++ ) {
final String importfunctionEntry = ((Element)importfunctions.item(i)).getAttribute( "name" );
if ( importfunctionEntry == null || importfunctionEntry.trim().equals( "" ) ) {
throw new SAXParseException( "<importfunction> cannot be blank",
parser.getLocator() );
}
FunctionImportDescr funcdescr = new FunctionImportDescr();
funcdescr.setTarget( importfunctionEntry );
packageDescr.addFunctionImport(funcdescr);
}
NodeList globals = element.getElementsByTagName( "global" );
for ( int i = 0, length = globals.getLength(); i < length; i++ ) {
final String identifier = ((Element)globals.item(i)).getAttribute( "identifier" );
if ( identifier == null || identifier.trim().equals( "" ) ) {
throw new SAXParseException( "<global> must have an identifier",
parser.getLocator() );
}
final String type = ((Element)globals.item(i)).getAttribute( "type" );
if ( type == null || type.trim().equals( "" ) ) {
throw new SAXParseException( "<global> must have specify a type",
parser.getLocator() );
}
final GlobalDescr global = new GlobalDescr( identifier,
type );
packageDescr.addGlobal( global );
}
return packageDescr;
}
public Class generateNodeFor() {
return PackageDescr.class;
}
}