/*
* Copyright 2013 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.workbench.screens.guided.rule.backend.server;
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.lang.Expander;
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.commons.backend.rule.RuleModelDRLPersistenceImpl;
import org.drools.workbench.models.datamodel.rule.RuleModel;
import org.drools.workbench.screens.guided.rule.service.GuidedRuleEditorService;
import org.drools.workbench.screens.guided.rule.type.GuidedRuleDSLRResourceTypeDefinition;
import org.guvnor.common.services.backend.file.FileDiscoveryService;
import org.guvnor.common.services.project.service.ProjectService;
import org.kie.workbench.common.services.backend.file.DSLFileFilter;
import org.kie.workbench.common.services.backend.source.BaseSourceService;
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 GuidedRuleDSLRSourceService
extends BaseSourceService<RuleModel> {
private static final Logger logger = LoggerFactory.getLogger( GuidedRuleDSLRSourceService.class );
private static final DSLFileFilter FILTER_DSLS = new DSLFileFilter();
@Inject
private GuidedRuleDSLRResourceTypeDefinition resourceType;
@Inject
private GuidedRuleEditorService guidedRuleEditorService;
@Inject
@Named("ioStrategy")
private IOService ioService;
@Inject
private FileDiscoveryService fileDiscoveryService;
@Inject
private ProjectService projectService;
@Override
public String getPattern() {
return resourceType.getSuffix();
}
@Override
public String getSource( final Path path,
final RuleModel model ) {
final String dslr = RuleModelDRLPersistenceImpl.getInstance().marshal( model );
final Expander expander = getDSLExpander( path );
final String drl = expander.expand( dslr );
return drl;
}
@Override
public String getSource( final Path path ) {
return getSource( path,
guidedRuleEditorService.load( Paths.convert( path ) ) );
}
/**
* Returns an expander for DSLs (only if there is a DSL configured for this package).
*/
public 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;
}
}