/*
* Copyright 2013 Red Hat, Inc. and/or its affiliates.
*
* 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.enterprise.inject.Instance;
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.commons.backend.rule.RuleModelIActionPersistenceExtension;
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.kie.workbench.common.services.backend.file.DSLFileFilter;
import org.kie.workbench.common.services.backend.source.BaseSourceService;
import org.kie.workbench.common.services.shared.project.KieProjectService;
import org.kie.workbench.common.services.shared.source.SourceGenerationFailedException;
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 KieProjectService projectService;
private Collection<RuleModelIActionPersistenceExtension> persistenceExtensions = new ArrayList<>();
@Inject
public GuidedRuleDSLRSourceService(final Instance<RuleModelIActionPersistenceExtension> persistenceExtensionInstance) {
persistenceExtensionInstance.forEach(persistenceExtensions::add);
}
@Override
public String getPattern() {
return resourceType.getSuffix();
}
@Override
public String getSource(final Path path,
final RuleModel model) throws SourceGenerationFailedException {
try {
final String dslr = RuleModelDRLPersistenceImpl.getInstance().marshal(model,
persistenceExtensions);
final Expander expander = getDSLExpander(path);
final String drl = expander.expand(dslr);
return drl;
} catch (Exception e) {
throw new SourceGenerationFailedException(e.getMessage());
}
}
@Override
public String getSource(final Path path) throws SourceGenerationFailedException {
return getSource(path,
guidedRuleEditorService.load(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;
}
}