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/*
* AbstractNameMapper.java
*
* Created on October 28, 2004, 2:51 PM
*/
package com.sun.jdo.api.persistence.mapping.ejb;
import java.util.*;
/** This is a class which helps translate between the various names of the
* CMP (ejb name, abstract schema, abstract bean, concrete bean, local
* interface, remote interface) and the persistence-capable class name. It
* also has methods for translation of field names. The basic entry point
* is ejb name or persistence-capable class name.
*
* @author Rochelle Raccah
*/
abstract public class AbstractNameMapper {
public static final int USER_DEFINED_KEY_CLASS = 1;
public static final int PRIMARY_KEY_FIELD = 2;
public static final int UNKNOWN_KEY_CLASS = 3;
/** Defines key field name for unknown primary key */
public static final String GENERATED_KEY_FIELD_NAME = "generatedPKField"; // NOI18N
/** Defines version field name prefix for version consistency */
public static final String GENERATED_VERSION_FIELD_PREFIX =
"thisVersionFieldWasGeneratedByTheNameMapper"; // NOI18N
protected static final String GENERATED_CMR_FIELD_PREFIX =
"thisRelationshipFieldWasGeneratedByTheNameMapper"; // NOI18N
abstract protected Map getGeneratedFieldsMap();
abstract protected Map getInverseFieldsMap();
/** Determines if the specified name represents an ejb.
* @param name the fully qualified name to be checked
* @return true if this name represents an ejb;
* false otherwise.
*/
abstract public boolean isEjbName(String name);
/** Gets the name of the abstract bean class which corresponds to the
* specified ejb name.
* @param name the name of the ejb
* @return the name of the abstract bean for the specified ejb
*/
abstract public String getAbstractBeanClassForEjbName(String name);
/** Gets the name of the key class which corresponds to the specified
* ejb name.
* @param name the name of the ejb
* @return the name of the key class for the ejb
*/
abstract public String getKeyClassForEjbName(String name);
/** Gets the name of the key class which corresponds to the specified
* persistence-capable key class name. Returns null if the
* supplied className is not a persistence-capable key class name.
* @param className the name of the persistence-capable key class
* @return the name of the key class for the ejb
*/
public String getKeyClassForPersistenceKeyClass(String className) {
String ejbName = getEjbNameForPersistenceKeyClass(className);
return ((ejbName != null) ? getKeyClassForEjbName(ejbName) : null);
}
/** Gets the name of the ejb name which corresponds to the
* specified persistence-capable key class name. Returns
* null if the supplied className is not a
* persistence-capable key class name.
* @param className the name of the persistence-capable key class
* @return the name of the ejb for the specified persistence-capable
* key class
*/
public String getEjbNameForPersistenceKeyClass(String className) {
if (className.toUpperCase().endsWith("OID")) { // NOI18N
return getEjbNameForPersistenceClass(
className.substring(0, className.length() - 4));
}
return null;
}
/** Get the type of key class of this ejb.
* @return the key class type, one of {@link #USER_DEFINED_KEY_CLASS},
* {@link #PRIMARY_KEY_FIELD}, or {@link #UNKNOWN_KEY_CLASS}
*/
abstract public int getKeyClassTypeForEjbName (String name);
/** Gets the name of the abstract schema which corresponds to the
* specified ejb.
* @param name the name of the ejb
* @return the name of the abstract schema for the specified ejb
*/
abstract public String getAbstractSchemaForEjbName(String name);
/** Gets the name of the ejb name which corresponds to the
* specified persistence-capable class name.
* @param className the name of the persistence-capable
* @return the name of the ejb for the specified persistence-capable
*/
abstract public String getEjbNameForPersistenceClass(String className);
/** Gets the name of the persistence-capable class which corresponds to
* the specified ejb name.
* @param name the name of the ejb
* @return the name of the persistence-capable for the specified ejb
*/
abstract public String getPersistenceClassForEjbName(String name);
/** Determines if the specified name represents a local interface.
* @param name the fully qualified name to be checked
* @return true if this name represents a local interface;
* false otherwise.
*/
abstract public boolean isLocalInterface(String name);
/** Gets the name of the persistence-capable class which corresponds to
* the specified local interface name.
* @param className the name of the persistence-capable class which
* contains fieldName from which to find relationship and therefore the
* local interface
* @param fieldName the name of the field in the persistence-capable class
* @param interfaceName the name of the local interface
* @return the name of the persistence-capable for the specified
* local interface which is related to the specified class name, field name
* pair
*/
public String getPersistenceClassForLocalInterface(String className,
String fieldName, String interfaceName) {
if (isLocalInterface(interfaceName)) {
String ejbName = getEjbNameForPersistenceClass(className);
String ejbField =
getEjbFieldForPersistenceField(className, fieldName);
return getPersistenceClassForEjbName(
getEjbNameForLocalInterface(ejbName, ejbField, interfaceName));
}
return null;
}
/** Gets the name of the ejb which corresponds to the specified
* local interface name.
* @param ejbName the name of the ejb which contains fieldName
* from which to find relationship and therefore the local interface
* @param fieldName the name of the field in the ejb
* @param interfaceName the name of the local interface
* @return the name of the ejb for the specified local interface
*/
abstract public String getEjbNameForLocalInterface(String ejbName,
String fieldName, String interfaceName);
/** Gets the name of the local interface which corresponds to the
* specified ejb name.
* @param name the name of the ejb
* @return the name of the local interface for the specified ejb
*/
abstract public String getLocalInterfaceForEjbName(String name);
/** Determines if the specified name represents a remote interface.
* @param name the fully qualified name to be checked
* @return true if this name represents a remote interface;
* false otherwise.
*/
abstract public boolean isRemoteInterface(String name);
/** Gets the name of the persistence-capable class which corresponds to
* the specified remote interface name.
* @param className the name of the persistence-capable class which
* contains fieldName from which to find relationship and therefore the
* remote interface
* @param fieldName the name of the field in the persistence-capable class
* @param interfaceName the name of the remote interface
* @return the name of the persistence-capable for the specified
* remote interface which is related to the specified class name, field name
* pair
*/
public String getPersistenceClassForRemoteInterface(
String className, String fieldName, String interfaceName) {
if (isRemoteInterface(interfaceName)) {
String ejbName = getEjbNameForPersistenceClass(className);
String ejbField =
getEjbFieldForPersistenceField(className, fieldName);
return getPersistenceClassForEjbName(
getEjbNameForRemoteInterface(ejbName, ejbField, interfaceName));
}
return null;
}
/** Gets the name of the ejb which corresponds to the specified
* remote interface name.
* @param ejbName the name of the ejb which contains fieldName
* from which to find relationship and therefore the remote interface
* @param fieldName the name of the field in the ejb
* @param interfaceName the name of the remote interface
* @return the name of the ejb for the specified remote interface
*/
abstract public String getEjbNameForRemoteInterface(String ejbName,
String fieldName, String interfaceName);
/** Gets the name of the remote interface which corresponds to the
* specified ejb name.
* @param name the name of the ejb
* @return the name of the remote interface for the specified ejb
*/
abstract public String getRemoteInterfaceForEjbName(String name);
/** Gets the name of the field in the ejb which corresponds to the
* specified persistence-capable class name and field name pair.
* @param className the name of the persistence-capable
* @param fieldName the name of the field in the persistence-capable
* @return the name of the field in the ejb for the specified
* persistence-capable field
*/
abstract public String getEjbFieldForPersistenceField(String className,
String fieldName);
/** Gets the name of the field in the persistence-capable class which
* corresponds to the specified ejb name and field name pair.
* @param name the name of the ejb
* @param fieldName the name of the field in the ejb
* @return the name of the field in the persistence-capable for the
* specified ejb field
*/
abstract public String getPersistenceFieldForEjbField(String name,
String fieldName);
/** Returns true if the field is a generated field.
* That includes: relationships generated for 2 way managed relationships,
* key fields generated for use with {@link #UNKNOWN_KEY_CLASS}, or
* version fields generated to hold a version consistency column.
* @param name the name of the ejb
* @param fieldName the name of the field in the ejb
* @return true if the field is generated;false
* otherwise
*/
public boolean isGeneratedField(String name, String fieldName) {
return isGeneratedEjbRelationship(name, fieldName) ||
fieldName.equals(GENERATED_KEY_FIELD_NAME) ||
fieldName.startsWith(GENERATED_VERSION_FIELD_PREFIX);
}
/** Returns true if the field in the persistence-capable
* class which corresponds to the specified ejb name and field name pair
* is one which was generated automatically for 2 way managed
* relationships in the case that the ejb specifies one way
* relationships.
* @param name the name of the ejb
* @param fieldName the name of the field in the ejb
* @return true if the field is generated;false
* otherwise
*/
public boolean isGeneratedEjbRelationship(String name, String fieldName) {
return getGeneratedFieldsMap().keySet().contains(
Arrays.asList(new String[]{name, fieldName}));
}
/** The list contains generated relationship field names.
* @param name the name of the ejb
* @return a List of generated relationship names
*/
public List getGeneratedRelationshipsForEjbName(String name) {
Map generatedFieldsMap = getGeneratedFieldsMap();
Iterator iterator = generatedFieldsMap.keySet().iterator();
List returnList = new ArrayList();
while (iterator.hasNext()) {
List nextField = (List)iterator.next();
if (nextField.get(0).equals(name))
returnList.add(nextField.get(1));
}
return returnList;
}
/** Gets the name of the generated field in the ejb which corresponds to
* the specified ejb name and field name pair.
* @param name the name of the ejb
* @param fieldName the name of the field in the ejb
* @return a String array of the form {, } which
* represents the generated field for the ejb field
*/
public String[] getGeneratedFieldForEjbField(String name,
String fieldName) {
List field = (List)getInverseFieldsMap().get(
Arrays.asList(new String[]{name, fieldName}));
return ((field != null) ?
(String[])field.toArray(new String[2]) : null);
}
/** Gets the name of the ejb field which corresponds to the specified
* generated ejb name and field name pair.
* @param name the name of the ejb
* @param fieldName the name of the field in the ejb
* @return a String array of the form {, } which
* represents the inverse field for the generated field
*/
public String[] getEjbFieldForGeneratedField(String name, String fieldName)
{
List field = (List)getGeneratedFieldsMap().get(
Arrays.asList(new String[]{name, fieldName}));
return ((field != null) ?
(String[])field.toArray(new String[2]) : null);
}
}
