User: dsundstrom
Date: 01/06/23 20:23:14
Added: src/main/org/jboss/ejb/plugins/cmp/bridge
CMPFieldBridge.java CMRFieldBridge.java
EntityBridge.java
EntityBridgeInvocationHandler.java
SelectorBridge.java
Log:
Initial revision of EJB 2.0 CMP.
Revision Changes Path
1.1
jboss/src/main/org/jboss/ejb/plugins/cmp/bridge/CMPFieldBridge.java
Index: CMPFieldBridge.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.ejb.plugins.cmp.bridge;
import org.jboss.ejb.EntityEnterpriseContext;
/**
* CMPFieldBridge represents one cmp field for one entity.
*
* Life-cycle:
* Tied to the EntityBridge.
*
* Multiplicity:
* One for each entity bean cmp field.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Dain Sundstrom</a>
* @version $Revision: 1.1 $
*/
public interface CMPFieldBridge {
public String getFieldName();
public Class getFieldType();
public boolean isPrimaryKeyMember();
public boolean isReadOnly();
public Object getInstanceValue(EntityEnterpriseContext ctx);
public void setInstanceValue(EntityEnterpriseContext ctx, Object value);
public Object getPrimaryKeyValue(Object primaryKey) throws
IllegalArgumentException;
public Object setPrimaryKeyValue(Object primaryKey, Object value) throws
IllegalArgumentException;
public void initInstance(EntityEnterpriseContext ctx);
/**
* Has the value of this field changes since the last time clean was called.
*/
public boolean isDirty(EntityEnterpriseContext ctx);
/**
* Mark this field as clean.
*/
public void setClean(EntityEnterpriseContext ctx);
}
1.1
jboss/src/main/org/jboss/ejb/plugins/cmp/bridge/CMRFieldBridge.java
Index: CMRFieldBridge.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.ejb.plugins.cmp.bridge;
import org.jboss.ejb.EntityEnterpriseContext;
/**
* CMRFieldBridge a bean relationship.
*
* Life-cycle:
* Haven't decided yet.
*
* Multiplicity:
* Haven't decided yet. Will be either one per bean relationship role, or
* one per relationship (shared between two beans).
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Dain Sundstrom</a>
* @version $Revision: 1.1 $
*/
public interface CMRFieldBridge {
public String getFieldName();
public Class getFieldType();
public Object getValue(EntityEnterpriseContext ctx);
public void setValue(EntityEnterpriseContext ctx, Object value);
}
1.1
jboss/src/main/org/jboss/ejb/plugins/cmp/bridge/EntityBridge.java
Index: EntityBridge.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.ejb.plugins.cmp.bridge;
import org.jboss.ejb.EntityEnterpriseContext;
/**
* EntityBridge follows the Bridge pattern [Gamma et. al, 1995].
* In this implementation of the pattern the Abstract is the entity bean class,
* and the RefinedAbstraction is the entity bean dynamic proxy. This interface
* can be considered the implementor. Each imlementation of the CMPStoreManager
* should create a store specifiec implementaion of the bridge.
*
* Life-cycle:
* Undefined. Should be tied to CMPStoreManager.
*
* Multiplicity:
* One per cmp entity bean type.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Dain Sundstrom</a>
* @version $Revision: 1.1 $
*/
public interface EntityBridge {
public String getEntityName();
public Class getPrimaryKeyClass();
public CMPFieldBridge[] getPrimaryKeyFields();
public CMPFieldBridge[] getCMPFields();
public CMRFieldBridge[] getCMRFields();
public SelectorBridge[] getSelectors();
/**
* Mark each field every as clean.
*/
public void setClean(EntityEnterpriseContext ctx);
/**
* Get every field that isDirty
*/
public CMPFieldBridge[] getDirtyFields(EntityEnterpriseContext ctx);
}
1.1
jboss/src/main/org/jboss/ejb/plugins/cmp/bridge/EntityBridgeInvocationHandler.java
Index: EntityBridgeInvocationHandler.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.ejb.plugins.cmp.bridge;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Map;
import java.util.HashMap;
import javax.ejb.EJBException;
import org.jboss.ejb.DeploymentException;
import org.jboss.ejb.EntityEnterpriseContext;
import org.jboss.proxy.InvocationHandler;
/**
* EntityBridgeInvocationHandler is the invocation hander used by the CMP 2.x
* dynamic proxy. This class only interacts with the EntityBridge. The main
* job of this class is to deligate invocation of abstract methods to the
* appropriate EntityBridge method.
*
* Life-cycle:
* Tied to the life-cycle of an entity bean instance.
*
* Multiplicity:
* One per cmp entity bean instance, including beans in pool.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Dain Sundstrom</a>
* @version $Revision: 1.1 $
*/
public class EntityBridgeInvocationHandler implements InvocationHandler {
protected EntityBridge entityBridge;
protected Class beanClass;
protected EntityEnterpriseContext ctx;
protected Map cmpFieldMap;
public EntityBridgeInvocationHandler(EntityBridge entityBridge, Class
beanClass) throws Exception {
this.entityBridge = entityBridge;
this.beanClass = beanClass;
setupCMPFieldMap(getAbstractAccessors());
}
public void setContext(EntityEnterpriseContext ctx) {
if(ctx != null && !beanClass.isInstance(ctx.getInstance())) {
throw new EJBException("Instance must be an instance of
beanClass");
}
this.ctx = ctx;
}
public Object invoke(Object proxy, Method method, Object[] args) throws
Throwable {
String methodName = method.getName();
// is this a cmp field accessor
CMPFieldBridge cmpField = (CMPFieldBridge) cmpFieldMap.get(method);
if(cmpField != null) {
if(methodName.startsWith("get")) {
return cmpField.getInstanceValue(ctx);
} else if(methodName.startsWith("set")) {
if(cmpField.isReadOnly()) {
throw new EJBException("Field is read-only: "
+ cmpField.getFieldName());
}
cmpField.setInstanceValue(ctx, args[0]);
return null;
}
throw new IllegalArgumentException("Unknown cmp field method:
" + methodName);
}
throw new IllegalArgumentException("Unknown method type: " +
methodName);
}
protected Map getAbstractAccessors() {
Method[] methods = beanClass.getMethods();
Map abstractAccessors = new HashMap(methods.length);
for(int i=0; i<methods.length; i++) {
if(Modifier.isAbstract(methods[i].getModifiers())) {
String methodName = methods[i].getName();
if(methodName.startsWith("get") ||
methodName.startsWith("set")) {
abstractAccessors.put(methodName, methods[i]);
}
}
}
return abstractAccessors;
}
protected void setupCMPFieldMap(Map abstractAccessors) {
CMPFieldBridge[] cmpFields = entityBridge.getCMPFields();
cmpFieldMap = new HashMap(cmpFields.length * 2);
for(int i=0; i<cmpFields.length; i++) {
setupCMPFieldGetter(abstractAccessors, cmpFields[i]);
setupCMPFieldSetter(abstractAccessors, cmpFields[i]);
}
}
protected void setupCMPFieldGetter(Map abstractAccessors, CMPFieldBridge
cmpField) {
String fieldName = cmpField.getFieldName();
String getterName = "get" + Character.toUpperCase(fieldName.charAt(0))
+ fieldName.substring(1);
Method getterMethod = (Method)abstractAccessors.get(getterName);
if(getterMethod != null) {
verifyGetter(getterMethod, cmpField);
cmpFieldMap.put(getterMethod, cmpField);
abstractAccessors.remove(getterName);
} else {
// not clear that a getter is required for each cmp field
// throw new DeploymentException("No getter found for cmp
field: " + fieldName);
}
}
protected void setupCMPFieldSetter(Map abstractAccessors, CMPFieldBridge
cmpField) {
String fieldName = cmpField.getFieldName();
String setterName = "set" + Character.toUpperCase(fieldName.charAt(0))
+ fieldName.substring(1);
Method setterMethod = (Method)abstractAccessors.get(setterName);
if(setterMethod != null) {
verifySetter(setterMethod, cmpField);
cmpFieldMap.put(setterMethod, cmpField);
abstractAccessors.remove(setterName);
} else {
// not clear that a setter is required for each cmp field
// throw new DeploymentException("No setter found for cmp
field: " + fieldName);
}
}
protected void verifyGetter(Method getterMethod, CMPFieldBridge cmpField) {
}
protected void verifySetter(Method setterMethod, CMPFieldBridge cmpField) {
}
}
1.1
jboss/src/main/org/jboss/ejb/plugins/cmp/bridge/SelectorBridge.java
Index: SelectorBridge.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.ejb.plugins.cmp.bridge;
/**
* SelectorBridge represents one ejbSelect method.
*
* Life-cycle:
* Tied to the EntityBridge.
*
* Multiplicity:
* One for each entity bean ejbSelect method.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Dain Sundstrom</a>
* @version $Revision: 1.1 $
*/
public interface SelectorBridge {
public String getSelectorName();
public Class getReturnType();
public Object execute(Object[] args);
}
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