/*
* 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.guvnor.server.contenthandler.drools;
import com.google.gwt.user.client.rpc.SerializationException;
import org.drools.compiler.DroolsParserException;
import org.drools.guvnor.client.rpc.Asset;
import org.drools.guvnor.client.rpc.RuleContentText;
import org.drools.guvnor.server.builder.AssemblyErrorLogger;
import org.drools.guvnor.server.builder.BRMSPackageBuilder;
import org.drools.guvnor.server.builder.ContentAssemblyError;
import org.drools.guvnor.server.contenthandler.ContentHandler;
import org.drools.guvnor.server.contenthandler.IRuleAsset;
import org.drools.lang.ExpanderException;
import org.drools.lang.dsl.DefaultExpander;
import org.drools.repository.AssetItem;
import java.io.IOException;
import java.io.StringReader;
import java.util.List;
public class DSLRuleContentHandler extends ContentHandler
implements
IRuleAsset {
public void retrieveAssetContent(Asset asset,
AssetItem item) throws SerializationException {
RuleContentText text = new RuleContentText();
text.content = item.getContent();
asset.setContent(text);
}
public void storeAssetContent(Asset asset,
AssetItem repoAsset) throws SerializationException {
RuleContentText text = (RuleContentText) asset.getContent();
repoAsset.updateContent(text.content);
}
public void compile(BRMSPackageBuilder builder,
AssetItem asset,
AssemblyErrorLogger logger) throws DroolsParserException,
IOException {
DefaultExpander expander = getExpander(builder,
asset,
logger);
String source = getRawDRL(asset);
//expand and check for errors
String drl = expander.expand(source);
if (expander.hasErrors()) {
List<ExpanderException> exErrs = expander.getErrors();
for (ExpanderException ex : exErrs) {
logger.logError(new ContentAssemblyError(
ex.getMessage(), asset.getFormat(), asset.getName(), asset.getUUID(), false, true));
}
return;
}
builder.addPackageFromDrl(new StringReader(drl));
}
private DefaultExpander getExpander(BRMSPackageBuilder builder,
AssetItem asset,
AssemblyErrorLogger logger) {
if (!builder.hasDSL()) {
logger.logError(new ContentAssemblyError(
"This rule asset requires a DSL, yet none were configured in the package.", asset.getFormat(), asset.getName(), asset.getUUID(), false, true));
}
return builder.getDSLExpander();
}
public void assembleDRL(BRMSPackageBuilder builder,
Asset asset,
StringBuilder stringBuilder) {
RuleContentText text = (RuleContentText) asset.getContent();
String source = text.content;
source = getDRL(source,
asset.getName(),
null);
DefaultExpander expander = builder.getDSLExpander();
stringBuilder.append(expander.expand(source));
}
public void assembleDRL(BRMSPackageBuilder builder,
AssetItem asset,
StringBuilder stringBuilder) {
//add the rule keyword if its 'stand alone'
String source = getRawDRL(asset);
DefaultExpander expander = builder.getDSLExpander();
stringBuilder.append(expander.expand(source));
}
private String wrapRule(String assetName,
String parentName,
String source) {
if (parentName == null || "".equals(parentName)) {
return "rule '" + assetName + "' \n" + source + "\nend";
} else {
return "rule '" + assetName + "' extends " + parentName + " \n" + source + "\nend";
}
}
public String getRawDRL(AssetItem asset) {
String source = asset.getContent();
String parentName = this.parentNameFromCategory(asset,
"");
source = getDRL(source,
asset.getName(),
parentName);
return source;
}
public String getDRL(String source,
String assetName,
String parentName) {
if (DRLFileContentHandler.isStandAloneRule(source)) {
source = wrapRule(assetName,
parentName,
source);
}
return source;
}
}