/*
* Copyright 2012 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.models.commons.backend.rule;
import java.util.List;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
import org.drools.guvnor.models.commons.backend.rule.util.upgrade.RuleModelUpgradeHelper1;
import org.drools.guvnor.models.commons.backend.rule.util.upgrade.RuleModelUpgradeHelper2;
import org.drools.guvnor.models.commons.backend.rule.util.upgrade.RuleModelUpgradeHelper3;
import org.drools.guvnor.models.commons.shared.rule.ActionFieldValue;
import org.drools.guvnor.models.commons.shared.rule.ActionGlobalCollectionAdd;
import org.drools.guvnor.models.commons.shared.rule.ActionInsertFact;
import org.drools.guvnor.models.commons.shared.rule.ActionInsertLogicalFact;
import org.drools.guvnor.models.commons.shared.rule.ActionRetractFact;
import org.drools.guvnor.models.commons.shared.rule.ActionSetField;
import org.drools.guvnor.models.commons.shared.rule.ActionUpdateField;
import org.drools.guvnor.models.commons.shared.rule.CompositeFactPattern;
import org.drools.guvnor.models.commons.shared.rule.CompositeFieldConstraint;
import org.drools.guvnor.models.commons.shared.rule.ConnectiveConstraint;
import org.drools.guvnor.models.commons.shared.rule.DSLSentence;
import org.drools.guvnor.models.commons.shared.rule.ExpressionCollection;
import org.drools.guvnor.models.commons.shared.rule.ExpressionCollectionIndex;
import org.drools.guvnor.models.commons.shared.rule.ExpressionField;
import org.drools.guvnor.models.commons.shared.rule.ExpressionFormLine;
import org.drools.guvnor.models.commons.shared.rule.ExpressionGlobalVariable;
import org.drools.guvnor.models.commons.shared.rule.ExpressionMethod;
import org.drools.guvnor.models.commons.shared.rule.ExpressionText;
import org.drools.guvnor.models.commons.shared.rule.ExpressionVariable;
import org.drools.guvnor.models.commons.shared.rule.FactPattern;
import org.drools.guvnor.models.commons.shared.rule.FreeFormLine;
import org.drools.guvnor.models.commons.shared.rule.FromAccumulateCompositeFactPattern;
import org.drools.guvnor.models.commons.shared.rule.FromCollectCompositeFactPattern;
import org.drools.guvnor.models.commons.shared.rule.FromCompositeFactPattern;
import org.drools.guvnor.models.commons.shared.rule.RuleAttribute;
import org.drools.guvnor.models.commons.shared.rule.RuleMetadata;
import org.drools.guvnor.models.commons.shared.rule.RuleModel;
import org.drools.guvnor.models.commons.shared.rule.SingleFieldConstraint;
/**
* This class persists the rule model to XML and back. This is the 'brl' xml
* format (Business Rule Language).
*/
public class BRXMLPersistence
implements BRLPersistence {
protected XStream xt;
private static final RuleModelUpgradeHelper1 upgrader1 = new RuleModelUpgradeHelper1();
private static final RuleModelUpgradeHelper2 upgrader2 = new RuleModelUpgradeHelper2();
private static final RuleModelUpgradeHelper3 upgrader3 = new RuleModelUpgradeHelper3();
private static final BRLPersistence INSTANCE = new BRXMLPersistence();
protected BRXMLPersistence() {
this.xt = new XStream( new DomDriver() );
this.xt.alias( "rule",
RuleModel.class );
this.xt.alias( "fact",
FactPattern.class );
this.xt.alias( "retract",
ActionRetractFact.class );
this.xt.alias( "assert",
ActionInsertFact.class );
this.xt.alias( "modify",
ActionUpdateField.class );
this.xt.alias( "setField",
ActionSetField.class );
this.xt.alias( "dslSentence",
DSLSentence.class );
this.xt.alias( "compositePattern",
CompositeFactPattern.class );
this.xt.alias( "fromCompositePattern",
FromCompositeFactPattern.class );
this.xt.alias( "fromCollectCompositePattern",
FromCollectCompositeFactPattern.class );
this.xt.alias( "fromAccumulateCompositePattern",
FromAccumulateCompositeFactPattern.class );
this.xt.alias( "metadata",
RuleMetadata.class );
this.xt.alias( "attribute",
RuleAttribute.class );
this.xt.alias( "fieldValue",
ActionFieldValue.class );
this.xt.alias( "connectiveConstraint",
ConnectiveConstraint.class );
this.xt.alias( "fieldConstraint",
SingleFieldConstraint.class );
this.xt.alias( "compositeConstraint",
CompositeFieldConstraint.class );
this.xt.alias( "assertLogical",
ActionInsertLogicalFact.class );
this.xt.alias( "freeForm",
FreeFormLine.class );
this.xt.alias( "addToGlobal",
ActionGlobalCollectionAdd.class );
//Begin ExpressionFormLine
this.xt.alias( "expression",
ExpressionFormLine.class );
this.xt.alias( "field",
ExpressionField.class );
this.xt.alias( "method",
ExpressionMethod.class );
this.xt.alias( "collection",
ExpressionCollection.class );
this.xt.alias( "collectionIndex",
ExpressionCollectionIndex.class );
this.xt.alias( "text",
ExpressionText.class );
this.xt.alias( "global",
ExpressionGlobalVariable.class );
this.xt.alias( "variable",
ExpressionVariable.class );
//end ExpressionFormLine
//See https://issues.jboss.org/browse/GUVNOR-1115
this.xt.aliasPackage( "org.drools.guvnor.client",
"org.drools.ide.common.client" );
this.xt.aliasPackage( "org.drools.guvnor.client.modeldriven.brl",
"org.kie.guvnor.datamodel.model" );
//Legacy DSLSentences have a collection of String values whereas newer persisted models
//have a collection of DSLVariableValues. See https://issues.jboss.org/browse/GUVNOR-1872
this.xt.registerLocalConverter( DSLSentence.class,
"values",
new DSLVariableValuesConverter( this.xt.getMapper() ) );
}
public static BRLPersistence getInstance() {
return INSTANCE;
}
/*
* (non-Javadoc)
* @see
* org.drools.ide.common.server.util.BRLPersistence#toXML(org.drools.guvnor
* .client.modeldriven.brl.RuleModel)
*/
public String marshal( final RuleModel model ) {
return this.xt.toXML( model );
}
/*
* (non-Javadoc)
* @see
* org.drools.ide.common.server.util.BRLPersistence#toModel(java.lang.String
* )
*/
public RuleModel unmarshal( final String xml ) {
if ( xml == null || xml.trim().length() == 0 ) {
return createEmptyModel();
}
RuleModel rm = (RuleModel) this.xt.fromXML( xml );
//Upgrade model changes to legacy artifacts
upgrader1.upgrade( rm );
upgrader2.upgrade( rm );
upgrader3.upgrade( rm );
return rm;
}
public RuleModel unmarshalUsingDSL( final String str,
final List<String> globals,
final String... dsls ) {
throw new UnsupportedOperationException();
}
protected RuleModel createEmptyModel() {
return new RuleModel();
}
}