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org.drools.core.factmodel.ClassDefinition Maven / Gradle / Ivy
/*
* Copyright 2008 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.core.factmodel;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.drools.core.phreak.Reactive;
import org.kie.api.definition.type.Annotation;
import org.kie.api.definition.type.FactField;
import org.kie.api.definition.type.FactType;
/**
* Declares a class to be dynamically created
*/
public class ClassDefinition
implements
FactType {
public static enum TRAITING_MODE { NONE, BASIC, LOGICAL }
private String className;
private String superClass;
private String[] interfaces;
private transient Class< ? > definedClass;
private TRAITING_MODE traitable;
private boolean abstrakt = false;
private Map metaData;
private LinkedHashMap fields = new LinkedHashMap();
private Map annotations;
private Map> modifiedPropsByMethod;
public ClassDefinition() {
this( null,
null,
null );
}
public ClassDefinition( String className ) {
this( className,
null,
null );
}
public ClassDefinition( String className,
String superClass,
String[] interfaces ) {
this.setClassName( className );
this.setSuperClass( superClass );
this.setInterfaces( interfaces );
}
public ClassDefinition( Class cls ) {
this.definedClass = cls;
this.setClassName( cls.getCanonicalName() );
this.setSuperClass( cls.getSuperclass() != null ? cls.getSuperclass().getCanonicalName() : null );
String[] interfaces = new String[cls.getInterfaces().length];
int i = 0;
for (Class interfaze : cls.getInterfaces()) {
interfaces[i++] = interfaze.getCanonicalName();
}
this.setInterfaces( interfaces );
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
this.className = (String) in.readObject();
this.superClass = (String) in.readObject();
this.interfaces = (String[]) in.readObject();
this.fields = (LinkedHashMap) in.readObject();
this.annotations = (Map) in.readObject();
this.modifiedPropsByMethod = (Map>) in.readObject();
this.traitable = (ClassDefinition.TRAITING_MODE) in.readObject();
this.abstrakt = in.readBoolean();
this.metaData = (HashMap) in.readObject();
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject( this.className );
out.writeObject( this.superClass );
out.writeObject( this.interfaces );
out.writeObject( this.fields );
out.writeObject( this.annotations );
out.writeObject( this.modifiedPropsByMethod);
out.writeObject( this.traitable );
out.writeBoolean( this.abstrakt );
out.writeObject( this.metaData );
}
/**
* @return Returns the name.
*/
public final String getClassName() {
return this.className;
}
/**
* @param className The name to set.
*/
public final void setClassName(final String className) {
this.className = className;
}
/**
* @return Returns the className.
*/
public final Class< ? > getDefinedClass() {
return definedClass;
}
/**
* @param definedClass The class to set.
*/
public void setDefinedClass(final Class< ? > definedClass) {
this.definedClass = definedClass;
}
/**
* Adds a field definition to this class
* @param attr
*/
public final void addField(FieldDefinition attr) {
this.fields.put( attr.getName(),
attr );
}
/**
* @return Returns an unmodifiable collection of field definitions
*/
public final Collection getFieldsDefinitions() {
return Collections.unmodifiableCollection( this.fields.values() );
}
/**
* Returns the field definition object for the given field name
*
* @param fieldName
* @return
*/
public final FieldDefinition getField(final String fieldName) {
return this.fields.get( fieldName );
}
public FieldDefinition getFieldByAlias( String alias ) {
for ( FactField factField : getFields() ) {
FieldDefinition def = (FieldDefinition) factField;
if ( def.resolveAlias().equals( alias ) ) {
return def;
}
}
return null;
}
/**
* Returns the field at position index, as defined by the builder using the @position annotation
* @param index
* @return the index-th field
*/
public FieldDefinition getField(int index) {
if (index >= fields.size() || index < 0) {
return null;
}
Iterator iter = fields.values().iterator();
for (int j = 0; j < index ; j++) {
iter.next();
}
return iter.next();
}
/**
* @return Returns the interfaces.
*/
public final String[] getInterfaces() {
return interfaces;
}
/**
* @param interfaces The interfaces to set.
*/
public final void setInterfaces(String[] interfaces) {
this.interfaces = (interfaces != null) ? interfaces : new String[0];
}
/**
* @return Returns the superClass.
*/
public final String getSuperClass() {
return superClass;
}
/**
* @param superClass The superClass to set.
*/
public final void setSuperClass(final String superClass) {
this.superClass = (superClass != null) ? superClass : "java.lang.Object";
}
public String getName() {
return getClassName();
}
public String getSimpleName() {
return getClassName().substring( getClassName().lastIndexOf( '.' ) + 1 );
}
public String getPackageName() {
return getClassName().substring( 0, getClassName().lastIndexOf( '.' ) );
}
public Object newInstance() throws InstantiationException,
IllegalAccessException {
return this.definedClass.newInstance();
}
public Class< ? > getFactClass() {
return getDefinedClass();
}
public List getFields() {
return new ArrayList( fields.values() );
}
public Object get(Object bean,
String field) {
FieldDefinition fieldDefinition = getField( field );
return fieldDefinition != null ? fieldDefinition.getFieldAccessor().getValue( bean ) : null;
}
public void set(Object bean,
String field,
Object value) {
FieldDefinition fieldDefinition = getField( field );
if (fieldDefinition != null) {
fieldDefinition.getFieldAccessor().setValue( bean, value );
}
}
public Map getAsMap(Object bean) {
Map m = new HashMap( fields.size() );
for (Map.Entry ent : this.fields.entrySet()) {
Object val = ent.getValue().getFieldAccessor().getValue(bean);
m.put(ent.getKey(),
val);
}
return m;
}
public void setFromMap(Object bean,
Map data) {
for (Map.Entry ent : data.entrySet()) {
set(bean,
ent.getKey(),
ent.getValue());
}
}
public void addAnnotation(AnnotationDefinition annotationDefinition) {
if (this.annotations == null) {
this.annotations = new HashMap();
}
this.annotations.put( annotationDefinition.getName(), annotationDefinition );
}
public Collection getAnnotations() {
return annotations != null ? annotations.values() : Collections.emptyList();
}
public AnnotationDefinition getAnnotation(Class annotationClass) {
return annotations != null ? annotations.get(annotationClass.getName()) : null;
}
public List getClassAnnotations() {
return Collections.unmodifiableList( new ArrayList( getAnnotations() ) );
}
public Map getMetaData() {
return metaData;
}
public void addMetaData( String key, Object value ) {
if ( this.metaData == null ) {
metaData = new HashMap();
}
metaData.put( key, value );
}
public void addModifiedPropsByMethod(Method method, List props) {
if (modifiedPropsByMethod == null) {
modifiedPropsByMethod = new HashMap>();
}
String methodName = modifiedPropsByMethodKey(method);
modifiedPropsByMethod.put(methodName, props);
}
public List getModifiedPropsByMethod(Method method) {
return getModifiedPropsByMethod(method.getName(), method.getParameterTypes().length );
}
public List getModifiedPropsByMethod(String methodName, int args) {
if (modifiedPropsByMethod == null) {
return null;
}
List byExactNumberOfArgs = modifiedPropsByMethod.get( methodName + "_" + args );
List bestEffortVarArgs = modifiedPropsByMethod.get( methodName + "_*" );
if ( byExactNumberOfArgs != null ) {
return byExactNumberOfArgs;
}
return bestEffortVarArgs; // << indeed maybe null
}
public static String modifiedPropsByMethodKey(Method method) {
return method.getName() + "_" + ( method.isVarArgs() ? "*" : method.getParameterTypes().length );
}
public boolean isReactive() {
return getAnnotation( Reactive.class ) != null;
}
public boolean isTraitable() {
return traitable != null && traitable != TRAITING_MODE.NONE;
}
public void setTraitable( boolean traitable ) {
setTraitable( traitable, false );
}
public void setTraitable( boolean traitable, boolean enableLogical ) {
if ( ! traitable ) {
this.traitable = TRAITING_MODE.NONE;
} else {
this.traitable = enableLogical ? TRAITING_MODE.LOGICAL : TRAITING_MODE.BASIC;
}
}
public boolean isFullTraiting() {
return this.traitable == TRAITING_MODE.LOGICAL;
}
public boolean isAbstrakt() {
return abstrakt;
}
public void setAbstrakt(boolean abstrakt) {
this.abstrakt = abstrakt;
}
public String toString() {
return "ClassDefinition{" +
"className='" + className + '\'' +
", superClass='" + superClass + '\'' +
", interfaces=" + (interfaces == null ? null : Arrays.asList(interfaces)) +
", definedClass=" + definedClass +
", traitable=" + traitable +
", abstract=" + abstrakt +
", fields=" + fields +
", annotations=" + annotations +
'}';
}
}
