/*
* 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.drltext.backend.server.indexing;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collection;
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.Expander;
import org.drools.compiler.lang.descr.PackageDescr;
import org.drools.compiler.lang.dsl.DSLMappingFile;
import org.drools.compiler.lang.dsl.DSLTokenizedMappingFile;
import org.drools.compiler.lang.dsl.DefaultExpander;
import org.drools.workbench.models.datamodel.oracle.ProjectDataModelOracle;
import org.drools.workbench.screens.drltext.type.DSLRResourceTypeDefinition;
import org.guvnor.common.services.backend.file.FileDiscoveryService;
import org.guvnor.common.services.project.model.Package;
import org.guvnor.common.services.project.model.Project;
import org.guvnor.common.services.project.service.ProjectService;
import org.kie.workbench.common.services.backend.file.DSLFileFilter;
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.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;
import org.uberfire.metadata.engine.Indexer;
import org.uberfire.metadata.model.KObject;
import org.uberfire.metadata.model.KObjectKey;
@ApplicationScoped
public class DslrFileIndexer implements Indexer {
private static final Logger logger = LoggerFactory.getLogger( DslrFileIndexer.class );
private static final DSLFileFilter FILTER_DSLS = new DSLFileFilter();
@Inject
@Named("ioStrategy")
protected IOService ioService;
@Inject
private DataModelService dataModelService;
@Inject
private ProjectService projectService;
@Inject
private FileDiscoveryService fileDiscoveryService;
@Inject
private DSLRResourceTypeDefinition dslrType;
@Override
public boolean supportsPath( final Path path ) {
return dslrType.accept( Paths.convert( path ) );
}
@Override
public KObject toKObject( final Path path ) {
KObject index = null;
try {
final String dslr = ioService.readAllString( path );
final Expander expander = getDSLExpander( path );
final String drl = expander.expand( dslr );
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 ProjectDataModelOracle dmo = getProjectDataModelOracle( path );
final Project project = projectService.resolveProject( Paths.convert( path ) );
final Package pkg = projectService.resolvePackage( Paths.convert( path ) );
final DefaultIndexBuilder builder = new DefaultIndexBuilder( project,
pkg );
final PackageDescrIndexVisitor visitor = new PackageDescrIndexVisitor( dmo,
builder,
packageDescr );
visitor.visit();
index = KObjectUtil.toKObject( path,
builder.build() );
} catch ( Exception e ) {
logger.error( "Unable to index '" + path.toUri().toString() + "'.",
e.getMessage() );
}
return index;
}
@Override
public KObjectKey toKObjectKey( final Path path ) {
return KObjectUtil.toKObjectKey( path );
}
//Delegate resolution of DMO to method to assist testing
protected ProjectDataModelOracle getProjectDataModelOracle( final Path path ) {
return dataModelService.getProjectDataModel( Paths.convert( path ) );
}
/**
* Returns an expander for DSLs (only if there is a DSL configured for this package).
*/
private Expander getDSLExpander( final Path path ) {
final Expander expander = new DefaultExpander();
final List<DSLMappingFile> dsls = getDSLMappingFiles( path );
for ( DSLMappingFile dsl : dsls ) {
expander.addDSLMapping( dsl.getMapping() );
}
return expander;
}
private List<DSLMappingFile> getDSLMappingFiles( final Path path ) {
final List<DSLMappingFile> dsls = new ArrayList<DSLMappingFile>();
final org.uberfire.backend.vfs.Path vfsPath = Paths.convert( path );
final org.uberfire.backend.vfs.Path packagePath = projectService.resolvePackage( vfsPath ).getPackageMainResourcesPath();
final org.uberfire.java.nio.file.Path nioPackagePath = Paths.convert( packagePath );
final Collection<Path> dslPaths = fileDiscoveryService.discoverFiles( nioPackagePath,
FILTER_DSLS );
for ( final org.uberfire.java.nio.file.Path dslPath : dslPaths ) {
final String dslDefinition = ioService.readAllString( dslPath );
final DSLTokenizedMappingFile dslFile = new DSLTokenizedMappingFile();
try {
if ( dslFile.parseAndLoad( new StringReader( dslDefinition ) ) ) {
dsls.add( dslFile );
} else {
logger.error( "Unable to parse DSL definition: " + dslDefinition );
}
} catch ( IOException ioe ) {
logger.error( ioe.getMessage() );
}
}
return dsls;
}
}