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/*
* AbstractMethodHelper.java
*
* Created on December 20, 2001, 5:30 PM
*/
package com.sun.jdo.spi.persistence.support.ejb.ejbc;
import java.util.*;
import java.lang.reflect.Method;
import com.sun.enterprise.deployment.*;
/** This is a helper class which extracts the information needed for method
* code generation of the concrete bean class.
*
* @author Rochelle Raccah
*/
abstract public class AbstractMethodHelper
{
/** Constant representing a local interface return type. */
public static final int LOCAL_RETURN = 0;
/** Constant representing a remote interface return type. */
public static final int REMOTE_RETURN = 1;
/** Constant representing no return type. */
public static final int NO_RETURN = 2;
private EjbCMPEntityDescriptor _cmpDescriptor;
private List finders = new ArrayList();
private List selectors = new ArrayList();
//private ArrayList otherMethods = new ArrayList();
private List createMethods = new ArrayList();
private Map methodNames = new HashMap();
/** Creates a new instance of AbstractMethodHelper
* @param descriptor the EjbCMPEntityDescriptor which defines the
* information for this bean.
*/
public AbstractMethodHelper (EjbCMPEntityDescriptor descriptor)
{
_cmpDescriptor = descriptor;
categorizeMethods(); // Separate methods into categories.
}
/** Gets the EjbCMPEntityDescriptor which defines the
* information for this bean.
* @return the EjbCMPEntityDescriptor for the bean specified in the
* constructor.
*/
protected EjbCMPEntityDescriptor getDescriptor() { return _cmpDescriptor; }
/**
* Reads all known methods and sorts them by name into specific
* Collections for further processing.
*/
protected void categorizeMethods ()
{
EjbCMPEntityDescriptor descriptor = getDescriptor();
Iterator iterator = descriptor.getMethodDescriptors().iterator();
while (iterator.hasNext())
{
MethodDescriptor methodDescriptor =
(MethodDescriptor)iterator.next();
Method method = methodDescriptor.getMethod(descriptor);
String methodName = methodDescriptor.getName();
//if (DEBUG)
// System.out.println("Method: " + methodName); // NOI18N
if (methodName.startsWith(CMPTemplateFormatter.find_))
finders.add(method);
else if (methodName.startsWith(CMPTemplateFormatter.ejbSelect_))
selectors.add(method);
else if (methodName.startsWith(CMPTemplateFormatter.create_))
createMethods.add(method);
else if (methodName.startsWith(CMPTemplateFormatter.get_) ||
methodName.startsWith(CMPTemplateFormatter.set_))
{
;// skip
}
//else
// otherMethods.add(method);
// It is OK to use HashMap here as we won't use it for possible
// overloaded methods.
methodNames.put(methodName, method);
}
}
/** Gets the list of finder methods for this bean.
* @return a list of java.lang.reflect.Method objects which represent
* the finders for this bean
*/
public List getFinders () { return finders; }
// give subclasses a chance to replace the list
protected void setFinders (List finderList)
{
finders = finderList;
}
/** Gets the list of selector methods for this bean.
* @return a list of java.lang.reflect.Method objects which represent
* the selectors for this bean
*/
public List getSelectors () { return selectors; }
// give subclasses a chance to replace the list
protected void setSelectors (List selectorList)
{
selectors = selectorList;
}
/** Gets the list of ejb create methods for this bean.
* @return a list of java.lang.reflect.Method objects which represent
* the ejb create methods for this bean
*/
public List getCreateMethods () { return createMethods; }
// might need this later
//public List getOtherMethods () { return otherMethods; }
/** Gets a map of the method names for this bean. The keys are the
* method names and the values are the java.lang.reflect.Method objects.
* These should represent all methods of this bean.
* @return a map of the method names to java.lang.reflect.Method objects
* for this bean
*/
public Map getMethodNames () { return methodNames; }
/** Gets the name of the local home which corresponds to this bean.
* @return the name of the local home class
*/
public String getLocalHome ()
{
return getDescriptor().getLocalHomeClassName();
}
/** Gets the name of the remote home which corresponds to this bean.
* @return the name of the remote home class
*/
public String getRemoteHome ()
{
return getDescriptor().getHomeClassName();
}
/** Gets the query descriptor associated with the specified method if it
* exists.
* @param method the java.lang.reflect.Method object used to find the
* query string
* @return a query descriptor for the specified method. Returns
* <code>null</code> for CMP 1.1 queries.
*/
protected QueryDescriptor getQueryDescriptor (Method method)
{
PersistenceDescriptor persistenceDescriptor =
getDescriptor().getPersistenceDescriptor();
return persistenceDescriptor.getQueryFor(method);
}
/** Gets the query string associated with the specified method if it
* exists.
* @param method the java.lang.reflect.Method object used to find the
* query string
* @return a query string for the specified method
*/
public String getQueryString (Method method)
{
QueryDescriptor queryDescriptor = getQueryDescriptor(method);
return ((queryDescriptor != null) ? queryDescriptor.getQuery() : null);
}
/** Gets the return type associated with the specified method if it
* exists. If no corresponding query descriptor is found, the value
* <code>NO_RETURN</code> is returned.
* @param method the java.lang.reflect.Method object used to find the
* query return type
* @return the return type for the specified method, one of
* {@link #LOCAL_RETURN}, {@link #REMOTE_RETURN}, or {@link #NO_RETURN}
*/
public int getQueryReturnType (Method method)
{
QueryDescriptor queryDescriptor = getQueryDescriptor(method);
if (queryDescriptor != null)
{
if (queryDescriptor.getHasLocalReturnTypeMapping())
return LOCAL_RETURN;
if (queryDescriptor.getHasRemoteReturnTypeMapping())
return REMOTE_RETURN;
}
return NO_RETURN;
}
/** Returns <code>true</code> if prefetch is enabled for the specified
* method, <code>false</code> otherwise. Prefetch is enabled by default.
* @param method the java.lang.reflect.Method object used to find the
* prefetch setting.
* @return a boolean representing the prefetch setting
*/
abstract public boolean isQueryPrefetchEnabled (Method method);
/** Gets the jdo filter expression associated with the specified method
* if it exists. Note that this method should only be used for CMP 1.1 -
* use {@link #getQueryString} for CMP 2.0.
* @param method the java.lang.reflect.Method object used to find the
* query filter
* @return the jdo filter expression
*/
abstract public String getJDOFilterExpression (Method method);
/** Gets the jdo parameter declaration associated with the specified
* method if it exists. Note that this method should only be used for
* CMP 1.1 - use {@link #getQueryString} for CMP 2.0.
* @param method the java.lang.reflect.Method object used to find the
* parameter declaration
* @return the jdo parameter declaration
*/
abstract public String getJDOParameterDeclaration (Method method);
/** Gets the jdo variables declaration associated with the specified
* method if it exists. Note that this method should only be used for
* CMP 1.1 - use {@link #getQueryString} for CMP 2.0.
* @param method the java.lang.reflect.Method object used to find the
* parameter declaration
* @return the jdo variables declaration
*/
abstract public String getJDOVariableDeclaration (Method method);
/** Gets the jdo ordering specification associated with the specified
* method if it exists. Note that this method should only be used for
* CMP 1.1 - use {@link #getQueryString} for CMP 2.0.
* @param method the java.lang.reflect.Method object used to find the
* parameter declaration
* @return the jdo ordering specification
*/
abstract public String getJDOOrderingSpecification (Method method);
}
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