Glassfish example source code file (JDOConcreteBean20Generator.java)
The Glassfish JDOConcreteBean20Generator.java source code/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
/*
* JDOConcreteBean20Generator.java
*
* Created on February 24, 2004
*/
package com.sun.jdo.spi.persistence.support.ejb.ejbc;
import java.util.*;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.text.MessageFormat;
import com.sun.jdo.api.persistence.model.Model;
import com.sun.jdo.api.persistence.model.ModelException;
import com.sun.jdo.api.persistence.model.jdo.*;
import com.sun.jdo.api.persistence.support.JDOUserException;
import com.sun.jdo.spi.persistence.support.ejb.model.util.NameMapper;
import com.sun.jdo.spi.persistence.support.ejb.ejbqlc.EJBQLC;
import com.sun.jdo.spi.persistence.support.ejb.ejbqlc.JDOQLElements;
import com.sun.jdo.spi.persistence.support.ejb.ejbqlc.EJBQLException;
import org.glassfish.persistence.common.I18NHelper;
import com.sun.jdo.spi.persistence.utility.generator.*;
import com.sun.jdo.spi.persistence.utility.logging.Logger;
/*
* This is the JDO specific generator for the concrete CMP beans for EJB2.0
*
* @author Marina Vatkina
*/
class JDOConcreteBean20Generator extends JDOConcreteBeanGenerator {
// EJBQLC ejbqlc
private EJBQLC ejbqlc;
/**
* Map that holds EJBQL compilation results for CMP 2.x beans queries.
* <tt>key is java.lang.reflect.Method object for the bean's
* finder or selector and the <tt>value is JDOQLElements object
* that represents EJBQL compilation results.
*/
private Map jdoqlElementsMap;
// StringBuffer for cascade-delete operations on ejbRemove
private StringBuffer cascadeDelete = null;
// String for getter method body
private String gbody = null;
// String for setter method body
private String sbody = null;
/**
* Signature with CVS keyword substitution for identifying the generated code
*/
static final String SIGNATURE =
"$RCSfile: JDOConcreteBean20Generator.java,v $ $Revision: 1.2 $"; //NOI18N
JDOConcreteBean20Generator(ClassLoader loader,
Model model,
NameMapper nameMapper)
throws IOException {
super(loader, model, nameMapper);
CMP20TemplateFormatter.initHelpers();
// Add the code generation signature of the generic and 2.x-specific
// generator classes.
addCodeGeneratorClassSignature(getSignaturesOfGeneratorClasses());
// init EJBQL compiler
ejbqlc = new EJBQLC(model, nameMapper);
}
/**
* Validate this CMP bean. At this point, only EJBQL validation is done for
* 2.0 CMP beans. Adds validation result to that of the super class.
* @param methodHelper the AbstractMethodHelper instance that contains
* all categorized methods and some other convenience methods for this bean.
* @param beanName the ejb name for this bean.
* @return a Collection of Exception instances with a separate instance for
* each failed validation.
*/
Collection validate(AbstractMethodHelper methodHelper, String beanName) {
Collection rc = super.validate(methodHelper, beanName);
this.beanName = beanName;
rc.addAll(validateEJBQL(methodHelper));
return rc;
}
/** Add interfaces to the class declarations.
*/
void addInterfaces() throws IOException {
super.addInterfaces();
jdoHelperWriter.addInterface(CMP20TemplateFormatter.helper20Interface_);
}
/** Set super class for the helper class.
*/
void setHelperSuperclass() throws IOException {
jdoHelperWriter.setSuperclass(CMP20TemplateFormatter.helper20Impl_);
}
/** Add import statements for for the generated classes.
*/
void addImportStatements(JavaFileWriter concreteImplFileWriter,
JavaFileWriter helperFileWriter) throws IOException {
super.addImportStatements(concreteImplFileWriter, helperFileWriter);
concreteImplFileWriter.addImport(
CMP20TemplateFormatter.ejbHashSetImport_, null);
}
/** Generate CMP2.0 specific methods.
*/
void generateTypeSpecificMethods(PersistenceFieldElement[] allFields,
AbstractMethodHelper methodHelper) throws IOException {
super.generateTypeSpecificMethods(allFields, methodHelper);
// Print getters and setters for CMP2.0 only.
generateGetSetMethods(allFields);
// Add selectors.
generateSelectors(methodHelper);
}
/** Adds getters and setters.
*/
private void generateGetSetMethods(PersistenceFieldElement[] fields)
throws IOException{
int i, count = ((fields != null) ? fields.length : 0);
setPKField = null; // reset to null to clean it up.
cascadeDelete = new StringBuffer();
// jdoCleanCollectionRef() body
StringBuffer cmrcleanbodyBuf = new StringBuffer(CMP20TemplateFormatter.none_);
for (i = 0; i < count; i++) {
PersistenceFieldElement pfe = fields[i];
if (PersistenceFieldElement.PERSISTENT == pfe.getPersistenceType()) {
// Reset the strings.
gbody = null;
sbody = null;
FieldInfo fieldInfo = new FieldInfo(model, nameMapper, pfe, beanName, pcname);
if (fieldInfo.isGeneratedField) {
// Skip generated fields as they are not present in the bean class.
// A field is generated for the unknown PK class, version consistency, or
// a 2 way managed relationship.
if (fieldInfo.isKey) {
// This is an extra field for the unknown PK class.
// PK setter name is used to generate the line for ejbCreate
// to set the PK value in _JDOState.
setPKField = fieldInfo.setter;
}
continue;
}
if (!(pfe instanceof RelationshipElement)) {
generateCMPGetSetBodies(fieldInfo);
} else { // CMR
if (isUpdateable) {
generateCMRGetSetBodies(fieldInfo, cmrcleanbodyBuf);
} else {
logger.log(Logger.WARNING, I18NHelper.getMessage(messages,
"CMG.CMRAccessNotAllowed", beanName, fieldInfo.name)); // NOI18N
gbody = CMPROTemplateFormatter.accessNotAllowedTemplate;
sbody = CMPROTemplateFormatter.updateNotAllowedTemplate;
}
}
// Now generate getter and setter:
CMPTemplateFormatter.addGenericMethod(
fieldInfo.getter, Modifier.PUBLIC, fieldInfo.type,
CMP20TemplateFormatter.getBodyAsStrings(gbody),
concreteImplWriter);
oneParam[0] = fieldInfo.type;
concreteImplWriter.addMethod(fieldInfo.setter, // name
Modifier.PUBLIC, // modifiers
CMP20TemplateFormatter.void_, // returnType
param0, // parameterNames
oneParam,// parameterTypes
null,// exceptions
CMP20TemplateFormatter.getBodyAsStrings(sbody), // body
null);// comments
}
}
// Now generate jdoCleanCollectionRef method
CMPTemplateFormatter.addGenericMethod(
CMP20TemplateFormatter.jdoCleanCollectionRef_,
CMP20TemplateFormatter.getBodyAsStrings(cmrcleanbodyBuf.toString()),
concreteImplWriter);
}
/** Generate bodies of getters and setters for CMP field
* @param fieldInfo the field information as FieldInfo instance.
*/
private void generateCMPGetSetBodies(FieldInfo fieldInfo) {
// For read-only beans it will be the same. For updateable
// beans it will be generated per field type.
sbody = CMPROTemplateFormatter.updateNotAllowedTemplate;
// Add code to load non-DFG field if necessary.
loadNonDFGField(fieldInfo);
if( fieldInfo.requireCloneOnGetAndSet ) {
// CMP field should have copy-in, copy-out semantics
// via clone.
twoParams[0] = fieldInfo.getter;
twoParams[1] = fieldInfo.type;
gbody = CMP20TemplateFormatter.copygformatter.format(twoParams);
if (isUpdateable) {
twoParams[0] = fieldInfo.setter;
if (!fieldInfo.isKey) {
sbody = CMP20TemplateFormatter.copysformatter.format(twoParams);
} else {
String[] params = new String[] {concreteImplName, fieldInfo.name};
sbody = CMP20TemplateFormatter.assertpksformatter.format(params) +
CMP20TemplateFormatter.pkcopysformatter.format(twoParams);
}
}
} else if( fieldInfo.isByteArray ) {
// A byte[] CMP field should have copy-in, copy-out semantics
// via System.arraycopy.
oneParam[0] = fieldInfo.getter;
gbody = CMP20TemplateFormatter.arraygformatter.format(oneParam);
if (isUpdateable) {
oneParam[0] = fieldInfo.setter;
sbody = CMP20TemplateFormatter.arraysformatter.format(oneParam);
}
} else if( fieldInfo.isSerializable ) {
// A special case for a Serializable CMP field (but not byte[]) -
// it should be serialized to/from a byte[] in PC instance.
threeParams[0] = fieldInfo.getter;
threeParams[1] = fieldInfo.type;
threeParams[2] = concreteImplName;
gbody = CMP20TemplateFormatter.sfldgformatter.format(threeParams);
if (isUpdateable) {
twoParams[0] = fieldInfo.setter;
twoParams[1] = concreteImplName;
sbody = CMP20TemplateFormatter.sfldsformatter.format(twoParams);
}
} else {
oneParam[0] = fieldInfo.getter;
gbody = CMP20TemplateFormatter.gformatter.format(oneParam);
if (isUpdateable) {
oneParam[0] = fieldInfo.setter;
if (!fieldInfo.isKey) {
sbody = CMP20TemplateFormatter.sformatter.format(oneParam);
} else {
StringBuffer sb = new StringBuffer();
if (!fieldInfo.isPrimitive) {
twoParams[0] = concreteImplName;
twoParams[1] = fieldInfo.name;
sb.append(
CMP20TemplateFormatter.assertpksformatter.format(twoParams));
}
sb.append(requireTrimOnSet(fieldInfo.type) ?
CMP20TemplateFormatter.pkstringsformatter.format(oneParam) :
CMP20TemplateFormatter.pksformatter.format(oneParam));
sbody = sb.toString();
}
}
}
}
/** Generate bodies of getters and setters for CMR field
* @param fieldInfo the field information as FieldInfo instance.
* @param cmrcleanbodyBuf the StringBuffer to append code for CMR cleanup
* if necessary.
*/
private void generateCMRGetSetBodies(FieldInfo fieldInfo,
StringBuffer cmrcleanbodyBuf) throws IOException {
RelationshipElement rel = (RelationshipElement)fieldInfo.pfe;
String otherPC = model.getRelatedClass(rel);
boolean manySide = model.isCollection(fieldInfo.type);
if (logger.isLoggable(Logger.FINE)) {
RelationshipElement otherField = rel.getInverseRelationship(model);
String otherFieldName = ((otherField != null) ?
nameMapper.getEjbFieldForPersistenceField(otherPC,
otherField.getName()) :
null);
logger.fine("manySide: " + manySide); // NOI18N
logger.fine("Field: " + otherFieldName); // NOI18N
}
String otherEJB = nameMapper.getEjbNameForPersistenceClass(otherPC);
String otherImpl = nameMapper.getConcreteBeanClassForEjbName(otherEJB);
MessageFormat mformat = null;
if (manySide) {
threeParams[0] = fieldInfo.getter;
threeParams[1] = fieldInfo.name;
threeParams[2] = otherImpl;
gbody = CMP20TemplateFormatter.cmrCgformatter.format(threeParams);
fourParams[0] = otherImpl;
fourParams[1] = fieldInfo.setter;
fourParams[2] = fieldInfo.getter;
fourParams[3] = fieldInfo.name;
sbody = CMP20TemplateFormatter.cmrCsformatter.format(fourParams);
mformat = CMP20TemplateFormatter.cmrcdCformatter;
twoParams[0] = fieldInfo.type;
twoParams[1] = fieldInfo.name;
CMP20TemplateFormatter.addPrivateField(
CMP20TemplateFormatter.cmrvformatter.format(twoParams),
0, concreteImplWriter);
oneParam[0] = fieldInfo.name;
cmrcleanbodyBuf.append(CMP20TemplateFormatter.cleancmrformatter.format(oneParam));
} else { // 1 side
fourParams[0] = otherPC;
fourParams[1] = fieldInfo.getter;
fourParams[2] = fieldInfo.type;
fourParams[3] = otherImpl;
gbody = CMP20TemplateFormatter.cmrgformatter.format(fourParams);
threeParams[0] = otherPC;
threeParams[1] = otherImpl;
threeParams[2] = fieldInfo.setter;
sbody = CMP20TemplateFormatter.cmrsformatter.format(threeParams);
mformat = CMP20TemplateFormatter.cmrcdformatter;
}
if (rel.getDeleteAction() == RelationshipElement.CASCADE_ACTION) {
twoParams[0] = fieldInfo.getter;
twoParams[1] = otherImpl;
cascadeDelete.append(mformat.format(twoParams));
try {
// Reset DeleteAction to NONE to suppress it in PM.deletePersistent().
rel.setDeleteAction(RelationshipElement.NONE_ACTION);
} catch (ModelException me) {
logger.log(Logger.SEVERE, I18NHelper.getMessage(messages,
"CMG.ModelExceptionOnDeleteAction", me)); //NOI18N
}
}
}
/** Validate EJBQL for ejbFind and ejbSelect methods by calling compilation.
* The method stores compilation results in the {@link #jdoqlElementsMap} map.
* This method is called only for CMP 2.x beans as there is no validation of
* CMP 1.1 queries at the deployment time.
* @param methodHelper the AbstractMethodHelper instance that contains
* all categorized methods and some other convenience methods for this bean.
* @return a Collection of found exceptions.
*/
private Collection validateEJBQL(AbstractMethodHelper methodHelper) {
Collection rc = new ArrayList();
jdoqlElementsMap = new HashMap();
List methods = new ArrayList(methodHelper.getFinders());
methods.addAll(methodHelper.getSelectors());
for (int i = 0; i < methods.size(); i++) {
Method m = (Method)methods.get(i);
String mname = m.getName();
if (mname.equals(CMP20TemplateFormatter.findByPrimaryKey_)) {
// No EJBQL is defined for findByPrimaryKey.
continue;
}
try {
// EJBQLC needs to know if we are processing a finder or a selector.
jdoqlElementsMap.put(m,
ejbqlc.compile(methodHelper.getQueryString(m), m,
methodHelper.getQueryReturnType(m),
mname.startsWith(CMP20TemplateFormatter.find_),
beanName));
} catch (EJBQLException e) {
rc.add(e);
}
}
return rc;
}
/** Returns JDOQLElements instance for this finder method.
* @param m the finder method as a java.lang.reflect.Method
* @param methodHelper the AbstractMethodHelper instance that contains
* all categorized methods and some other convenience methods for this bean.
* @return JDOQLElements instance.
*/
JDOQLElements getJDOQLElements(Method m,
AbstractMethodHelper methodHelper) throws IOException{
// Call the EJBQL compiler if there is no known result
// from validate call.
JDOQLElements rs = (JDOQLElements)jdoqlElementsMap.get(m);
if (rs == null) {
if (logger.isLoggable(Logger.FINE)) {
logger.fine("JDOQLElements NOT FOUND for: " + m.getName());
}
rs = ejbqlc.compile(methodHelper.getQueryString(m), m,
methodHelper.getQueryReturnType(m), true, beanName);
}
return rs;
}
/** Adds ejbSelectBy methods.
*/
private void generateSelectors(AbstractMethodHelper methodHelper) throws IOException{
List selectors = methodHelper.getSelectors();
boolean debug = logger.isLoggable(Logger.FINE);
if (debug) {
logger.fine("Selectors: " + selectors.size()); // NOI18N
}
for (int i = 0; i < selectors.size(); i++) {
Method m = (Method)selectors.get(i);
String mname = m.getName();
if (debug) {
logger.fine("Selector: " + mname); // NOI18N
}
JDOQLElements rs = (JDOQLElements)jdoqlElementsMap.get(m);
if (rs == null) {
if (debug) {
logger.fine("JDOQLElements NOT FOUND for: " + mname);
}
// calling EJBQL compiler
rs = ejbqlc.compile(methodHelper.getQueryString(m), m,
methodHelper.getQueryReturnType(m), false, beanName);
}
String returnType = m.getReturnType().getName();
CMP20TemplateFormatter.addGenericMethod(
m, mname, returnType,
generateSelectorMethodBody(methodHelper, rs, mname, m, returnType, i),
concreteImplWriter);
}
}
/** Returns method body for EJBCreate method.
* @param createName the actual name of the method as String.
* @param exc a String[] of decleared exceptions for this method.
* @param parametersList the list of method parameters as String.
* @param parametersListWithSeparator the list of concatenated method
* parameters to be passed to another method as String.
* @return method body as String.
*/
String getEJBCreateMethodBody(String createName,
String[] exc, String parametersList,
String parametersListWithSeparator) {
// ejbCreate in the superclass will have the same suffix, so we need
// to pass the actual name to the formatter - see 'createName' parameter.
if (!containsException(exc, CMP20TemplateFormatter.CreateException_)) {
throw new JDOUserException(I18NHelper.getMessage(messages,
"EXC_NoCreateException", createName, abstractBean)); // NOI18N
}
// For read-only beans it will be the same. For updateable
// beans it will be generated as required.
String body = CMPROTemplateFormatter.accessNotAllowedTemplate;
if (isUpdateable) {
sixParams[0] = pcname;
sixParams[1] = createName;
sixParams[2] = parametersList;
sixParams[4] = concreteImplName;
sixParams[5] = parametersListWithSeparator;
if (pkClass.equals(Object.class.getName())) {
sixParams[3] = setPKField;
body = CMP20TemplateFormatter.cunpkformatter.format(sixParams);
} else {
sixParams[3] = pkClass;
body = CMP20TemplateFormatter.cformatter.format(sixParams);
}
}
return body;
}
/** Returns method body for EJBPostCreate method.
* @param postCreateName the actual name of the method as String.
* @param parametersList the list of method parameters as String.
* @param parametersListWithSeparator the list of concatenated method
* parameters to be passed to another method as String.
* @return method body as String.
*/
String getEJBPostCreateMethodBody(String postCreateName,
String parametersList, String parametersListWithSeparator) {
// For read-only beans it will be the same. For updateable
// beans it will be generated as required.
String body = CMPTemplateFormatter.none_;
if (isUpdateable) {
twoParams[0] = postCreateName;
twoParams[1] = parametersList;
body = CMP20TemplateFormatter.postcformatter.format(twoParams);
}
return body;
}
/** Returns method body for EJBRemove method.
* @return method body as String.
*/
String getEJBRemoveMethodBody() {
// For read-only beans it will throw an exception. For updateable
// beans it will be generated as required.
String body = CMPROTemplateFormatter.updateNotAllowedTemplate;
if (isUpdateable) {
// CMP2.0 might have cascade-delete requirement.
if (cascadeDelete.length() > 0) {
oneParam[0] = CMP20TemplateFormatter.startCascadeDeleteTemplate +
cascadeDelete.append(
CMP20TemplateFormatter.endCascadeDeleteTemplate).
toString();
} else {
oneParam[0] = CMP20TemplateFormatter.none_;
}
body = CMP20TemplateFormatter.rmformatter.format(oneParam);
}
return body;
}
/** Adds other known required methods identified by properties that do
* not need formatting but differ between CMP types.
* CMP20TemplateFormatter.otherPublicMethods_ differ between CMP types.
*/
void generateKnownMethods(AbstractMethodHelper methodHelper)
throws IOException {
super.generateKnownMethods(methodHelper);
String[] exc = null;
String[] st = CMP20TemplateFormatter.otherPublicMethodsArray;
for (int i = 0; i < st.length; i++) {
String mname = st[i];
exc = getExceptionList(methodHelper, mname);
String body = CMPROTemplateFormatter.updateNotAllowedTemplate;
// Only ejbLoad from this list doesn't differ for read-only beans.
if (isUpdateable || mname.equals(CMPTemplateFormatter.ejbLoad_)) {
body = CMP20TemplateFormatter.helpers.getProperty(mname);
} else if (mname.equals(CMPTemplateFormatter.jdoCleanAllRefs_)) {
body = CMPROTemplateFormatter.jdoCleanAllRefsTemplate;
}
concreteImplWriter.addMethod(mname, // name
Modifier.PUBLIC, // modifiers
CMP20TemplateFormatter.void_, // returnType
null, // parameterNames
null,// parameterTypes
exc,// exceptions
CMP20TemplateFormatter.getBodyAsStrings(body), // body
null);// comments
}
}
/**
* Generates helper methods for the helper class.
*/
void generateHelperClassMethods() throws IOException {
super.generateHelperClassMethods();
// Add Helper.assertInstanceOfLocalInterfaceImpl() method for cmp2.0 only.
oneParam[0] = CMP20TemplateFormatter.assertInstanceOfLocalInterfaceImplTemplate;
jdoHelperWriter.addMethod(CMP20TemplateFormatter.assertInstanceOfLocalInterfaceImpl_, // name
Modifier.PUBLIC, // modifiers
CMP20TemplateFormatter.void_, // returnType
param0, // parameterNames
objectType,// parameterTypes
null,// exceptions
oneParam, // body
null);// comments
}
/**
* Generates conversion methods from PC to EJBObject and back
* to the helper class.
*/
void generateConversions() throws IOException {
super.generateConversions();
// For EJBLocalObject.
if (hasLocalInterface == false) {
String[] pcParams = new String[] {CMP20TemplateFormatter.pc_,
CMP20TemplateFormatter.jdoPersistenceManager_};
String[] pcParamTypes = new String[] {CMP20TemplateFormatter.Object_,
CMP20TemplateFormatter.jdoPersistenceManagerClass_};
String[] body = CMP20TemplateFormatter.getBodyAsStrings(
CMP20TemplateFormatter.returnNull_);
jdoHelperWriter.addMethod(CMP20TemplateFormatter.convertPCToEJBLocalObject_, // name
Modifier.PUBLIC, // modifiers
CMP20TemplateFormatter.ejbLocalObject_, // returnType
pcParams, // parameterNames
pcParamTypes,// parameterTypes
null,// exceptions
body, // body
null);// comments
String[] pcParamsX = new String[] {CMP20TemplateFormatter.pc_,
CMP20TemplateFormatter.jdoPersistenceManager_,
CMP20TemplateFormatter.context_};
String[] pcParamTypesX = new String[] {CMP20TemplateFormatter.Object_,
CMP20TemplateFormatter.jdoPersistenceManagerClass_,
CMP20TemplateFormatter.ejbContext_};
jdoHelperWriter.addMethod(CMP20TemplateFormatter.convertPCToEJBLocalObject_, // name
Modifier.PUBLIC, // modifiers
CMP20TemplateFormatter.ejbLocalObject_, // returnType
pcParamsX, // parameterNames
pcParamTypesX,// parameterTypes
null,// exceptions
body, // body
null);// comments
twoParams[0] = CMP20TemplateFormatter.ejbLocalObject_;
twoParams[1] = CMP20TemplateFormatter.jdoPersistenceManagerClass_;
jdoHelperWriter.addMethod(CMP20TemplateFormatter.convertEJBLocalObjectToPC_, // name
Modifier.PUBLIC, // modifiers
CMP20TemplateFormatter.Object_, // returnType
param0PM, // parameterNames
twoParams,// parameterTypes
null,// exceptions
body, // body
null);// comments
}
}
/**
* Generates the body of the Entity-Bean selector methods.
* This is the special result set handling.
* @param methodHelper the AbstractMethodHelper instance that contains
* all categorized methods and some other convenience methods for this bean
* @param jdoqlElements the result of the EJBQL-Compiler
* @param mname name of the selector method in
* the concrete entity bean implementation
* @param m selector method object
* @param index index of selector method in selectors list
* @param returnType the returntype of the selectormethod
* @return the generated body
* @exception IOException
*/
private String generateSelectorMethodBody(AbstractMethodHelper methodHelper,
JDOQLElements jdoqlElements,
String mname,
Method m,
String returnType,
int index) throws IOException {
StringBuffer body = new StringBuffer();
// add preSelect callback
oneParam[0] = concreteImplName;
body.append(CMP20TemplateFormatter.preselectformatter.format(oneParam));
// common body for finder/selectors
body.append(generateFinderSelectorCommonBody(methodHelper,
jdoqlElements,
mname,
m,
returnType,
index));
// body with resulthandling depending on the type of the selector
// (single or multivalue)
if (isSingleObjectSelector(m)) {
body.append(generateResultHandlingForSingleSelector(
jdoqlElements, mname, m, methodHelper, returnType));
} else {
body.append(generateResultHandlingForMultiSelector(
jdoqlElements, m, methodHelper));
}
return body.toString();
}
/**
* Generates the result handling for a multi-value selector method.
* The generated code converts the JDO query result set into the appropriate
* selector result.
* @param jdoqlElements the result of the JDOQL compiler
* @param m selector method object
* @param methodHelper the AbstractMethodHelper instance that contains
* all categorized methods and some other convenience methods for this bean
* @return the generated result set handling
*/
private String generateResultHandlingForMultiSelector(
JDOQLElements jdoqlElements,
Method m,
AbstractMethodHelper methodHelper) {
boolean convertToSet = false;
String body = null;
MessageFormat mformat = null;
// getting the catch-clause body from the properties
oneParam[0] = m.getName();
// depending of the kind of returntype a different convertermethodcall
// is generated
if (isSelectorReturningSet(m)) convertToSet = true;
int queryReturnType = methodHelper.getQueryReturnType(m);
if ((queryReturnType == AbstractMethodHelper.NO_RETURN) &&
jdoqlElements.isPCResult()) {
// Use LOCAL_RETURN as default,
// if there is no result-type-mapping specified and
// the JDOQL query returns a collection of pc instances
queryReturnType = AbstractMethodHelper.LOCAL_RETURN;
}
switch (queryReturnType) {
case (AbstractMethodHelper.LOCAL_RETURN):
mformat = CMP20TemplateFormatter.multiselectorconvformatter;
threeParams[0] =
getConcreteBeanForPCClass(jdoqlElements.getResultType());
threeParams[1] = convertToSet ?
CMP20TemplateFormatter.convertCollectionPCToEJBLocalObjectSet_ :
CMP20TemplateFormatter.convertCollectionPCToEJBLocalObject_;
threeParams[2] = CMP20TemplateFormatter.catchClauseTemplate;
body = mformat.format(threeParams);
break;
case (AbstractMethodHelper.REMOTE_RETURN):
mformat = CMP20TemplateFormatter.multiselectorconvformatter;
threeParams[0] =
getConcreteBeanForPCClass(jdoqlElements.getResultType());
threeParams[1] = convertToSet ?
CMP20TemplateFormatter.convertCollectionPCToEJBObjectSet_ :
CMP20TemplateFormatter.convertCollectionPCToEJBObject_;
threeParams[2] = CMP20TemplateFormatter.catchClauseTemplate;
body = mformat.format(threeParams);
break;
case (AbstractMethodHelper.NO_RETURN):
default:
mformat = convertToSet ?
CMP20TemplateFormatter.multiselectorsetformatter :
CMP20TemplateFormatter.multiselectorformatter;
oneParam[0] = CMP20TemplateFormatter.catchClauseTemplate;
body = mformat.format(oneParam);
break;
}
return body;
}
/**
* Generates the result handling for a single-object selector method.
* The generated code converts the JDO query result set into the appropriate
* selector result.
* @param jdoqlElements the result of the JDOQL compiler
* @param mname name of the selector method in
* the concrete entity bean implementation
* @param m selector method object
* @param methodHelper the AbstractMethodHelper instance that contains
* all categorized methods and some other convenience methods for this bean
* @param returnType the returntype of the selectormethod
* @return the generated result set handling
*/
private String generateResultHandlingForSingleSelector(
JDOQLElements jdoqlElements,
String mname,
Method m,
AbstractMethodHelper methodHelper,
String returnType) {
StringBuffer body = new StringBuffer();
MessageFormat mformat = null;
String jdoResultType = jdoqlElements.getResultType();
String ejbName = null;
// generated code that tests the cardinality of the JDO query
// a JDOQL aggregate query returns a single object => no check needed
if (!jdoqlElements.isAggregate()) {
mformat = CMP20TemplateFormatter.singleselectorformatter;
oneParam[0] = mname;
body.append(mformat.format(oneParam));
}
// getting the catch-clause body from the properties
oneParam[0] = CMP20TemplateFormatter.none_;
int queryReturnType = methodHelper.getQueryReturnType(m);
if ((queryReturnType == AbstractMethodHelper.NO_RETURN) &&
jdoqlElements.isPCResult()) {
// Use LOCAL_RETURN as default,
// if there is no result-type-mapping specified and
// the JDOQL query returns a collection of pc instances
queryReturnType = AbstractMethodHelper.LOCAL_RETURN;
}
// generate different converter method call depending on return type
switch (queryReturnType) {
case (AbstractMethodHelper.LOCAL_RETURN):
ejbName = nameMapper.getEjbNameForPersistenceClass(jdoResultType);
mformat = CMP20TemplateFormatter.singleselectorreturnconvformatter;
fourParams[0] = nameMapper.getLocalInterfaceForEjbName(ejbName);
fourParams[1] = nameMapper.getConcreteBeanClassForEjbName(ejbName);
fourParams[2] = CMP20TemplateFormatter.convertPCToEJBLocalObject_;
fourParams[3] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(fourParams));
break;
case (AbstractMethodHelper.REMOTE_RETURN):
ejbName = nameMapper.getEjbNameForPersistenceClass(jdoResultType);
mformat = CMP20TemplateFormatter.singleselectorreturnconvformatter;
fourParams[0] = nameMapper.getRemoteInterfaceForEjbName(ejbName);
fourParams[1] = nameMapper.getConcreteBeanClassForEjbName(ejbName);
fourParams[2] = CMP20TemplateFormatter.convertPCToEJBObject_;
fourParams[3] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(fourParams));
break;
case (AbstractMethodHelper.NO_RETURN):
default:
Class returnTypeClass = m.getReturnType();
// tests if it is aggregate function and proceed it first
if (jdoqlElements.isAggregate()) {
if (returnTypeClass.isPrimitive()) {
mformat = CMP20TemplateFormatter.aggregateselectorprimitivereturnformatter;
fourParams[0] = mname;
fourParams[1] = jdoResultType;
fourParams[2] = CMP20TemplateFormatter.dot_ +
CMP20TemplateFormatter.getUnwrapMethodName(returnTypeClass);
fourParams[3] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(fourParams));
} else if (returnTypeClass.getName().equals(jdoResultType)) {
mformat = CMP20TemplateFormatter.aggregateselectorreturnformatter;
twoParams[0] = jdoResultType;
twoParams[1] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(twoParams));
} else if (returnTypeClass.isAssignableFrom(
java.math.BigDecimal.class)) {
mformat = CMP20TemplateFormatter.aggregateselectorreturnbigdecimalconvformatter;
twoParams[0] = jdoResultType;
twoParams[1] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(twoParams));
} else if (returnTypeClass.isAssignableFrom(
java.math.BigInteger.class)) {
mformat = CMP20TemplateFormatter.aggregateselectorreturnbigintegerconvformatter;
twoParams[0] = jdoResultType;
twoParams[1] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(twoParams));
} else {
mformat = CMP20TemplateFormatter.aggregateselectorreturnconvformatter;
fourParams[0] = returnType;
fourParams[1] = jdoResultType;
fourParams[2] = CMP20TemplateFormatter.dot_ +
CMP20TemplateFormatter.getUnwrapMethodName(
CMP20TemplateFormatter.getPrimitiveClass(
CMP20TemplateFormatter.getPrimitiveName(returnTypeClass)));
fourParams[3] = CMP20TemplateFormatter.catchClauseTemplate;
body.append(mformat.format(fourParams));
}
} else {
// tests if the returntype is a primitive java type
// if so, the cast parameter is the wrapperclass of the
// primitive type and the getterMethod for the primitive
// value of the wrapper class is added.
// This is necessary because the JDOQuery returns collections
// of objects only, but the selector returns a primitive type.
mformat = CMP20TemplateFormatter.singleselectorreturnformatter;
if (returnTypeClass.isPrimitive()) {
threeParams[0] = CMP20TemplateFormatter.getWrapperName(returnType);
threeParams[1] = CMP20TemplateFormatter.dot_ +
CMP20TemplateFormatter.getUnwrapMethodName(returnTypeClass);
threeParams[2] = CMP20TemplateFormatter.catchClauseTemplate;
} else {
threeParams[0] = returnType;
threeParams[1] = CMP20TemplateFormatter.none_;
threeParams[2] = CMP20TemplateFormatter.catchClauseTemplate;
}
body.append(mformat.format(threeParams));
}
break;
}
return body.toString();
}
/**
* Generates code that check the finder/selector parameters for the
* Query.execute call (if necessary).
* @param m Method instance of the specific finder/selector method
* @param parameterEjbNames array of ejb names
* @return the codefragment for the checking local/remote parameters
* for method if EJB name is known from ejbql.
*/
String generateFinderSelectorParamCheck(Method m,
String[] parameterEjbNames) {
StringBuffer checkBody = new StringBuffer();
Class[] paramTypes = m.getParameterTypes();
int paramLength = paramTypes.length;
String paramClassName = null;
for (int i = 0; i < paramLength; i++) {
if (parameterEjbNames[i] != null) {
paramClassName = paramTypes[i].getName();
String concreteImplName =
nameMapper.getConcreteBeanClassForEjbName(
parameterEjbNames[i]);
twoParams[0] = concreteImplName;
twoParams[1] = CMP20TemplateFormatter.param_ + i;
if (nameMapper.isLocalInterface(paramClassName)) {
checkBody.append(CMP20TemplateFormatter.finderselectorchecklocalformatter.format(twoParams));
} else { // Remote
checkBody.append(CMP20TemplateFormatter.finderselectorcheckremoteformatter.format(twoParams));
}
}
}
return checkBody.toString();
}
/**
* Checks if the finder returns an Enumeration. Returns <code>false
* for CMP2.0.
* @param finder Methodobject of the finder
* @return <code>true if the finder returns a Enumeration
*/
boolean isFinderReturningEnumeration(Method finder) {
return false;
}
/**
* Checks if the selector method is a single-object or multi-object selector.
* @param finder Method object of the finder
* @return <code>true if it is a single-object-value selector
*/
private boolean isSingleObjectSelector(Method finder) {
return (!(finder.getReturnType().equals(java.util.Collection.class) ||
finder.getReturnType().equals(java.util.Set.class)));
}
/**
* Checks if the a selector returns a Set (for CMP2.0)
* @param selector Methodobject of the selector
* @return <code>true if the selector returns a Set
*/
private boolean isSelectorReturningSet(Method selector) {
return (selector.getReturnType().equals(java.util.Set.class));
}
/**
* Returns the signatures of the classes and properties which are
* involved in the codegen.
* @return The signatures as a string.
*/
String getSignaturesOfGeneratorClasses()
{
StringBuffer signatures = new StringBuffer().
// adding signature of JDOConcreteBeanGenerator
append(super.getSignaturesOfGeneratorClasses()).
append(CMPTemplateFormatter.signatureDelimiter_).
// adding signature of JDOConcreteBean20Generator
append(JDOConcreteBean20Generator.SIGNATURE).
append(CMPTemplateFormatter.signatureDelimiter_).
// adding signature of CMP20Templates.properties
append(CMP20TemplateFormatter.signature2_0Template).
append(CMPTemplateFormatter.signatureDelimiter_).
// adding signature of EJBQLC
append(EJBQLC.SIGNATURE);
return signatures.toString();
}
}
Other Glassfish examples (source code examples)Here is a short list of links related to this Glassfish JDOConcreteBean20Generator.java source code file: |
The search page
Other Glassfish source code examples at this package level
Click here to learn more about this project
