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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
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package org.drools.compiler.kie.util;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.drools.base.definitions.InternalKnowledgePackage;
import org.drools.compiler.builder.impl.KnowledgeBuilderFactoryServiceImpl;
import org.drools.compiler.kie.builder.impl.InternalKieModule;
import org.drools.drl.ast.descr.BaseDescr;
import org.drools.drl.ast.descr.FunctionDescr;
import org.drools.drl.ast.descr.GlobalDescr;
import org.drools.drl.ast.descr.PackageDescr;
import org.drools.drl.ast.descr.RuleDescr;
import org.drools.drl.ast.descr.TypeDeclarationDescr;
import org.drools.drl.ast.descr.TypeFieldDescr;
import org.drools.drl.parser.DrlParser;
import org.drools.io.ByteArrayResource;
import org.drools.util.StringUtils;
import org.drools.util.TypeResolver;
import org.kie.api.io.ResourceType;
import org.kie.internal.builder.ChangeType;
import org.kie.internal.builder.KnowledgeBuilder;
import org.kie.internal.builder.KnowledgeBuilderConfiguration;
import org.kie.internal.builder.ResourceChange;
import org.kie.internal.builder.ResourceChangeSet;
import org.kie.internal.builder.conf.DefaultPackageNameOption;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.DEFAULT_PACKAGE;
import static org.drools.util.ClassUtils.convertClassToResourcePath;
import static org.drools.util.ClassUtils.convertResourceToClassName;
import static org.drools.util.StringUtils.isEmpty;
public class ChangeSetBuilder {
private static final Logger logger = LoggerFactory.getLogger( ChangeSetBuilder.class );
private static String defaultPackageName;
private ChangeSetBuilder() { }
public static KieJarChangeSet build( InternalKieModule original, InternalKieModule currentJar ) {
KieJarChangeSet result = new KieJarChangeSet();
Collection originalFiles = original.getFileNames();
Collection currentFiles = currentJar.getFileNames();
ArrayList removedFiles = new ArrayList<>( originalFiles );
removedFiles.removeAll( currentFiles );
if( ! removedFiles.isEmpty() ) {
for( String file : removedFiles ) {
// there should be a way to get the JAR name/url to produce a proper URL for the file in it
result.removeFile( file );
}
}
List typeDeclarations = new ArrayList<>();
Map changedClasses = new HashMap<>();
for( String file : currentFiles ) {
if( originalFiles.contains( file ) ) {
// check for modification
byte[] ob = original.getBytes( file );
byte[] cb = currentJar.getBytes( file );
if( ! Arrays.equals( ob, cb ) ) {
if (file.endsWith( ".class" )) {
changedClasses.put(convertResourceToClassName(file), file);
} else if ( !ResourceType.DRL.matchesExtension(file) || !StringUtils.codeAwareEqualsIgnoreSpaces(new String(ob), new String(cb)) ) {
// check that: (NOT drl file) OR (NOT equalsIgnoringSpaces)
// parse the file to figure out the difference
result.registerChanges( file, diffResource( file, ob, cb, typeDeclarations ) );
}
}
} else {
// file was added
result.addFile( file );
}
}
for (TypeDeclarationDescr typeDeclaration : typeDeclarations) {
String fqn = typeDeclaration.getFullTypeName();
if (changedClasses.containsKey( fqn )) {
continue;
}
InternalKnowledgePackage pkg = original.getPackage( typeDeclaration.getNamespace() );
if (pkg == null) {
continue;
}
TypeResolver resolver = pkg.getTypeResolver();
for (TypeFieldDescr field : typeDeclaration.getFields().values()) {
String fieldType;
try {
fieldType = resolver.resolveType( field.getPattern().getObjectType() ).getCanonicalName();
} catch (ClassNotFoundException e) {
continue;
}
if (changedClasses.containsKey( fieldType )) {
changedClasses.put( fqn, convertClassToResourcePath( fqn ) );
break;
}
}
}
for (String changedClass : changedClasses.values()) {
result.registerChanges( changedClass, new ResourceChangeSet( changedClass, ChangeType.UPDATED ) );
}
if (original.getKieModuleModel() != null) {
for (String kieBaseName : original.getKieModuleModel().getKieBaseModels().keySet()) {
KnowledgeBuilder originalKbuilder = original.getKnowledgeBuilderForKieBase( kieBaseName );
if ( originalKbuilder != null && currentJar.getKnowledgeBuilderForKieBase( kieBaseName ) == null ) {
currentJar.cacheKnowledgeBuilderForKieBase( kieBaseName, originalKbuilder );
}
}
}
return result;
}
private static ResourceChangeSet diffResource(String file, byte[] originalBytes, byte[] currentBytes, List typeDeclarations) {
ResourceChangeSet pkgcs = new ResourceChangeSet( file, ChangeType.UPDATED );
ResourceType type = ResourceType.determineResourceType( file );
if( ResourceType.DRL.equals( type ) || ResourceType.GDRL.equals( type ) || ResourceType.RDRL.equals( type ) || ResourceType.TDRL.equals( type )) {
try {
PackageDescr originalPkg = new DrlParser().parse( new ByteArrayResource( originalBytes ) );
PackageDescr currentPkg = new DrlParser().parse( new ByteArrayResource( currentBytes ) );
String pkgName = isEmpty(currentPkg.getName()) ? getDefaultPackageName() : currentPkg.getName();
String oldPkgName = isEmpty(originalPkg.getName()) ? getDefaultPackageName() : originalPkg.getName();
if (!oldPkgName.equals(pkgName)) {
// if the package name is changed everthing has to be recreated from scratch
// so it is useless to further investigate other changes
return pkgcs;
}
pkgcs.setPackageName(pkgName);
for( RuleDescr crd : currentPkg.getRules() ) {
pkgcs.getLoadOrder().add(new ResourceChangeSet.RuleLoadOrder(pkgName, crd.getName(), crd.getLoadOrder()));
}
List orules = new ArrayList<>( originalPkg.getRules() ); // needs to be cloned
diffDescrs(originalBytes, currentBytes, pkgcs, orules, currentPkg.getRules(), ResourceChange.Type.RULE, RULE_CONVERTER);
List ofuncs = new ArrayList<>( originalPkg.getFunctions() ); // needs to be cloned
diffDescrs(originalBytes, currentBytes, pkgcs, ofuncs, currentPkg.getFunctions(), ResourceChange.Type.FUNCTION, FUNC_CONVERTER);
List oglobals = new ArrayList<>( originalPkg.getGlobals() ); // needs to be cloned
diffDescrs(originalBytes, currentBytes, pkgcs, oglobals, currentPkg.getGlobals(), ResourceChange.Type.GLOBAL, GLOBAL_CONVERTER);
for (TypeDeclarationDescr typeDeclaration : currentPkg.getTypeDeclarations()) {
if ( isEmpty( typeDeclaration.getNamespace()) ) {
typeDeclaration.setNamespace( isEmpty( currentPkg.getNamespace() ) ? DEFAULT_PACKAGE : currentPkg.getNamespace() );
}
typeDeclarations.add( typeDeclaration );
}
} catch ( Exception e ) {
logger.error( "Error analyzing the contents of "+file+". Skipping.", e );
}
}
pkgcs.getChanges().sort( Comparator.comparingInt( r -> r.getChangeType().ordinal() ) );
return pkgcs;
}
private interface DescrNameConverter {
String getName(T descr);
}
private static final RuleDescrNameConverter RULE_CONVERTER = new RuleDescrNameConverter();
private static class RuleDescrNameConverter implements DescrNameConverter {
@Override
public String getName(RuleDescr descr) {
return descr.getName();
}
}
private static final FuncDescrNameConverter FUNC_CONVERTER = new FuncDescrNameConverter();
private static class FuncDescrNameConverter implements DescrNameConverter {
@Override
public String getName(FunctionDescr descr) {
return descr.getName();
}
}
private static final GlobalDescrNameConverter GLOBAL_CONVERTER = new GlobalDescrNameConverter();
private static class GlobalDescrNameConverter implements DescrNameConverter {
@Override
public String getName(GlobalDescr descr) {
return descr.getIdentifier();
}
}
private static void diffDescrs(byte[] ob, byte[] cb,
ResourceChangeSet pkgcs,
List odescrs, List cdescrs,
ResourceChange.Type type, DescrNameConverter descrNameConverter) {
Set updatedRules = null;
if (type == ResourceChange.Type.RULE) {
updatedRules = new HashSet<>();
(( List ) cdescrs).sort( RULE_HIERARCHY_COMPARATOR );
}
for( T crd : cdescrs ) {
String cName = descrNameConverter.getName(crd);
// unfortunately have to iterate search for a rule with the same name
boolean found = false;
for( Iterator it = odescrs.iterator(); it.hasNext(); ) {
T ord = it.next();
if( descrNameConverter.getName(ord).equals( cName ) ) {
found = true;
it.remove();
// using codeAwareEqualsIgnoreSpaces comparison because using the descriptor equals() method
// is brittle and heavier than iterating an array
if ( !StringUtils.codeAwareEqualsIgnoreSpaces(new String(Arrays.copyOfRange(ob, ord.getStartCharacter(), ord.getEndCharacter())),new String(Arrays.copyOfRange(cb, crd.getStartCharacter(), crd.getEndCharacter())) )
|| (type == ResourceChange.Type.RULE && updatedRules.contains( ( (RuleDescr) crd ).getParentName() )) ) {
pkgcs.getChanges().add( new ResourceChange( ChangeType.UPDATED, type, cName ) );
if (type == ResourceChange.Type.RULE) {
updatedRules.add(cName);
}
}
break;
}
}
if( !found ) {
pkgcs.getChanges().add( new ResourceChange( ChangeType.ADDED, type, cName ) );
}
}
for ( T ord : odescrs ) {
pkgcs.getChanges().add( new ResourceChange( ChangeType.REMOVED,
type,
descrNameConverter.getName(ord) ) );
}
}
private static final RuleHierarchyComparator RULE_HIERARCHY_COMPARATOR = new RuleHierarchyComparator();
private static class RuleHierarchyComparator implements Comparator {
@Override
public int compare( RuleDescr r1, RuleDescr r2 ) {
return r1.getName().equals( r2.getParentName() ) ? -1 : r2.getName().equals( r1.getParentName() ) ? 1 : 0;
}
}
private static String getDefaultPackageName() {
if (defaultPackageName == null) {
KnowledgeBuilderConfiguration conf = new KnowledgeBuilderFactoryServiceImpl().newKnowledgeBuilderConfiguration();
defaultPackageName = conf.getOption(DefaultPackageNameOption.KEY).packageName();
}
return defaultPackageName;
}
}
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