/*
* Copyright 2014 JBoss, by Red Hat, 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.workbench.screens.dsltext.backend.server.indexing;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import javax.inject.Named;
import org.drools.compiler.compiler.DrlParser;
import org.drools.compiler.lang.descr.PackageDescr;
import org.drools.compiler.lang.dsl.DSLMappingEntry;
import org.drools.compiler.lang.dsl.DSLTokenizedMappingFile;
import org.drools.workbench.models.datamodel.oracle.ProjectDataModelOracle;
import org.drools.workbench.screens.dsltext.type.DSLResourceTypeDefinition;
import org.guvnor.common.services.project.model.Package;
import org.guvnor.common.services.project.model.Project;
import org.kie.uberfire.metadata.engine.Indexer;
import org.kie.uberfire.metadata.model.KObject;
import org.kie.uberfire.metadata.model.KObjectKey;
import org.kie.workbench.common.services.datamodel.backend.server.service.DataModelService;
import org.kie.workbench.common.services.refactoring.backend.server.indexing.DefaultIndexBuilder;
import org.kie.workbench.common.services.refactoring.backend.server.indexing.PackageDescrIndexVisitor;
import org.kie.workbench.common.services.refactoring.backend.server.util.KObjectUtil;
import org.kie.workbench.common.services.refactoring.model.index.IndexElementsGenerator;
import org.kie.workbench.common.services.refactoring.model.index.Rule;
import org.kie.workbench.common.services.shared.project.KieProjectService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.uberfire.backend.server.util.Paths;
import org.uberfire.io.IOService;
import org.uberfire.java.nio.file.Path;
@ApplicationScoped
public class DslFileIndexer implements Indexer {
private static final Logger logger = LoggerFactory.getLogger( DslFileIndexer.class );
@Inject
@Named("ioStrategy")
protected IOService ioService;
@Inject
private DataModelService dataModelService;
@Inject
protected KieProjectService projectService;
@Inject
protected DSLResourceTypeDefinition dslType;
@Override
public boolean supportsPath( final Path path ) {
return dslType.accept( Paths.convert( path ) );
}
@Override
public KObject toKObject( final Path path ) {
KObject index = null;
try {
final List<String> lhs = new ArrayList<String>();
final List<String> rhs = new ArrayList<String>();
final String dsl = ioService.readAllString( path );
//Construct a dummy DRL file to parse index elements
final DSLTokenizedMappingFile dslLoader = new DSLTokenizedMappingFile();
if ( dslLoader.parseAndLoad( new StringReader( dsl ) ) ) {
for ( DSLMappingEntry e : dslLoader.getMapping().getEntries() ) {
switch ( e.getSection() ) {
case CONDITION:
lhs.add( e.getValuePattern() );
break;
case CONSEQUENCE:
rhs.add( e.getValuePattern() );
break;
}
}
final String drl = makeDrl( path,
lhs,
rhs );
final DrlParser drlParser = new DrlParser();
final PackageDescr packageDescr = drlParser.parse( true,
drl );
if ( packageDescr == null ) {
logger.error( "Unable to parse DRL for '" + path.toUri().toString() + "'." );
return index;
}
final Project project = projectService.resolveProject( Paths.convert( path ) );
final Package pkg = projectService.resolvePackage( Paths.convert( path ) );
//Don't include rules created to parse DSL
final DefaultIndexBuilder builder = new DefaultIndexBuilder( project,
pkg ) {
@Override
public DefaultIndexBuilder addGenerator( final IndexElementsGenerator generator ) {
if ( generator instanceof Rule ) {
return this;
}
return super.addGenerator( generator );
}
};
final ProjectDataModelOracle dmo = getProjectDataModelOracle( path );
final PackageDescrIndexVisitor visitor = new PackageDescrIndexVisitor( dmo,
builder,
packageDescr );
visitor.visit();
return KObjectUtil.toKObject( path,
builder.build() );
}
} catch ( Exception e ) {
logger.error( e.getMessage() );
}
return index;
}
@Override
public KObjectKey toKObjectKey( final Path path ) {
return KObjectUtil.toKObjectKey( path );
}
//Delegate resolution of package name to method to assist testing
protected String getPackageName( final Path path ) {
return projectService.resolvePackage( Paths.convert( path ) ).getPackageName();
}
//Delegate resolution of DMO to method to assist testing
protected ProjectDataModelOracle getProjectDataModelOracle( final Path path ) {
return dataModelService.getProjectDataModel( Paths.convert( path ) );
}
private String makeDrl( final Path path,
final List<String> lhs,
final List<String> rhs ) {
final StringBuilder sb = new StringBuilder();
final String packageName = getPackageName( path );
sb.append( "package " ).append( packageName ).append( "\n" );
sb.append( "rule \"mock\"\n" );
sb.append( "when\n" );
for ( String e : lhs ) {
sb.append( e ).append( "\n" );
}
sb.append( "then\n" );
for ( String e : rhs ) {
sb.append( e ).append( "\n" );
}
sb.append( "end\n" );
return sb.toString();
}
}