entityintrospector.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 843 行 · 第 1/2 页

/*
 * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.amber.cfg;

import com.caucho.amber.AmberTableCache;
import com.caucho.amber.manager.AmberPersistenceUnit;
import com.caucho.amber.table.AmberTable;
import com.caucho.amber.type.*;
import com.caucho.amber.field.SubId;
import com.caucho.config.ConfigException;
import com.caucho.config.types.Period;
import com.caucho.util.L10N;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import javax.persistence.InheritanceType;
import javax.persistence.AttributeOverrides;
import javax.persistence.DiscriminatorType;
import javax.persistence.DiscriminatorValue;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.logging.Logger;
import javax.persistence.AttributeOverride;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.DiscriminatorColumn;
import javax.persistence.Embeddable;
import javax.persistence.Entity;
import javax.persistence.IdClass;
import javax.persistence.Inheritance;
import javax.persistence.JoinColumn;
import javax.persistence.MappedSuperclass;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.SecondaryTable;
import javax.persistence.Table;

/**
 * Configuration for an entity bean
 */
public class EntityIntrospector extends BaseConfigIntrospector {
  private static final L10N L = new L10N(EntityIntrospector.class);
  private static final Logger log
    = Logger.getLogger(EntityIntrospector.class.getName());

  /**
   * Creates the introspector.
   */
  EntityIntrospector(AmberConfigManager manager)
  {
    super(manager);
  }

  /**
   * Returns true for entity type.
   */
  public boolean isEntity(Class type)
  {
    getInternalEntityConfig(type, _annotationCfg);
 
    return (! _annotationCfg.isNull());
  }

  /**
   * Introspects.
   */
  public BeanType introspect(Class type)
    throws ConfigException, SQLException
  {
    BeanType beanType = null;
    
    try {
      EntityType entityType = null;

      EntityType parentType = introspectParent(type.getSuperclass());

      entityType = introspectEntityType(type, parentType);

      if (entityType == null)
	entityType = introspectMappedType(type, parentType);

      if (entityType == null)
	return introspectEmbeddableType(type);
      
      beanType = entityType;
      
      // jpa/0ge2
      entityType.setInstanceClassName(type.getName() + "__ResinExt");
      entityType.setEnhanced(true);

      MappedSuperclassConfig mappedSuperOrEntityConfig
	= introspectEntityConfig(type);
				 
      entityType.setParentType(parentType);

      introspectTable(type, entityType, parentType);

      // inheritance must be after table since it adds columns
      introspectInheritance(type, entityType, parentType);
      
      introspectTableCache(entityType, type);

      getInternalIdClassConfig(type, _annotationCfg);
      IdClass idClassAnn = (IdClass) _annotationCfg.getAnnotation();
      IdClassConfig idClassConfig = _annotationCfg.getIdClassConfig();

      Class idClass = null;
      if (! _annotationCfg.isNull()) {
        if (idClassAnn != null)
          idClass = idClassAnn.value();
        else {
          String s = idClassConfig.getClassName();
          idClass = _persistenceUnit.loadTempClass(s);
        }

        // XXX: temp. introspects idClass as an embeddable type.
	_persistenceUnit.addEntityClass(idClass.getName(), idClass);

        // jpa/0i49 vs jpa/0i40
        // embeddable.setFieldAccess(isField);
      }

      if (entityType.getId() != null) {
      }
      else if (entityType.isFieldAccess())
        introspectIdField(_persistenceUnit, entityType, parentType,
                          type, idClass, mappedSuperOrEntityConfig);
      else {
        introspectIdMethod(_persistenceUnit, entityType, parentType,
                           type, idClass, mappedSuperOrEntityConfig);
      }

      HashMap<String, IdConfig> idMap = null;

      AttributesConfig attributes = null;

      if (mappedSuperOrEntityConfig != null) {
        attributes = mappedSuperOrEntityConfig.getAttributes();

        if (attributes != null)
          idMap = attributes.getIdMap();
      }

      // if ((idMap == null) || (idMap.size() == 0)) {
      //   idMap = entityType.getSuperClass();
      // }

      if (entityType.isEntity() && (entityType.getId() == null) && ((idMap == null) || (idMap.size() == 0)))
        throw new ConfigException(L.l("{0} does not have any primary keys.  Entities must have at least one @Id or exactly one @EmbeddedId field.",
                                      entityType.getName()));

      // Introspect overridden attributes. (jpa/0ge2)
      introspectAttributeOverrides(entityType, type);

      introspectSecondaryTable(entityType, type);

      if (entityType.isFieldAccess())
        introspectFields(_persistenceUnit, entityType, parentType, type,
                         mappedSuperOrEntityConfig, false);
      else
        introspectMethods(_persistenceUnit, entityType, parentType, type,
                          mappedSuperOrEntityConfig);

      introspectCallbacks(type, entityType);
      

      // Adds entity listeners, if any.
      introspectEntityListeners(type, entityType, _persistenceUnit);

      // Adds sql result set mappings, if any.
      introspectSqlResultSetMappings(type, entityType, entityType.getName());

      // Adds named queries, if any.
      introspectNamedQueries(type, entityType.getName());
      introspectNamedNativeQueries(type, entityType.getName());
    } catch (ConfigException e) {
      if (beanType != null)
        beanType.setConfigException(e);

      throw e;
    } catch (SQLException e) {
      if (beanType != null)
        beanType.setConfigException(e);

      throw e;
    } catch (RuntimeException e) {
      if (beanType != null)
        beanType.setConfigException(e);

      throw e;
    }

    return beanType;
  }

  private EntityType introspectEntityType(Class type,
					  EntityType parentType)
    throws SQLException
  {
    getInternalEntityConfig(type, _annotationCfg);
      
    Entity entityAnn = (Entity) _annotationCfg.getAnnotation();
    EntityConfig entityConfig = _annotationCfg.getEntityConfig();

    boolean isEntity = ! _annotationCfg.isNull();

    if (! isEntity)
      return null;
    
    EntityType entityType;
    String typeName;
    
    if (entityConfig != null)
      typeName = entityConfig.getClassName();
    else
      typeName = entityAnn.name();

    // Validates the type
    String entityName;
    Inheritance inheritanceAnn = null;
    InheritanceConfig inheritanceConfig = null;
    Class rootClass = type;
    Entity rootEntityAnn = null;
    EntityConfig rootEntityConfig = null;

    validateType(type, true);

      // jpa/0ge2
      // if (hasInheritance) {

    if (entityConfig == null)
      entityName = entityAnn.name();
    else {
      entityName = entityConfig.getClassName();

      int p = entityName.lastIndexOf('.');

      if (p > 0)
	entityName = entityName.substring(p + 1);
    }

    if ((entityName == null) || "".equals(entityName)) {
      entityName = type.getSimpleName();
    }

    entityType = _persistenceUnit.createEntity(entityName, type);

    _configManager.addType(type, new EntityConfig(type.getName(), this, entityType));

    boolean isField = isField(type, entityConfig, false);

    if (isField)
      entityType.setFieldAccess(true);

    return entityType;
  }

  private EntityType introspectMappedType(Class type, EntityType parentType)
    throws SQLException
  {
    EntityType entityType;

    boolean isMappedSuperclass = false;
    MappedSuperclass mappedSuperAnn = null;
    MappedSuperclassConfig mappedSuperConfig = null;

    String typeName;

    MappedSuperclassConfig mappedSuperOrEntityConfig = null;

    getInternalMappedSuperclassConfig(type, _annotationCfg);
    mappedSuperAnn = (MappedSuperclass) _annotationCfg.getAnnotation();
    mappedSuperConfig = _annotationCfg.getMappedSuperclassConfig();

    isMappedSuperclass = ! _annotationCfg.isNull();

    if (! isMappedSuperclass)
      return null;
    
    mappedSuperOrEntityConfig = mappedSuperConfig;

    if (mappedSuperConfig != null)
      typeName = mappedSuperConfig.getClassName();
/*    else
      typeName = mappedSuperAnn.name();
*/
    // Validates the type
    String entityName;
    Inheritance inheritanceAnn = null;
    InheritanceConfig inheritanceConfig = null;
    Class rootClass = type;
    Entity rootEntityAnn = null;
    EntityConfig rootEntityConfig = null;

    validateType(type, false);

    // jpa/0ge2
    // if (hasInheritance) {

    if (mappedSuperConfig == null)
      entityName = null;//mappedSuperAnn.name();
    else {
      entityName = mappedSuperConfig.getSimpleClassName();
    }

    if ((entityName == null) || "".equals(entityName)) {
      entityName = type.getSimpleName();
    }

    entityType = _persistenceUnit.createMappedSuperclass(entityName, type);

    _configManager.addType(type, new EntityConfig(type.getName(), this, entityType));

    boolean isField = isField(type, mappedSuperOrEntityConfig, false);

    if (isField)
      entityType.setFieldAccess(true);

    // jpa/0ge2
    entityType.setInstanceClassName(type.getName() + "__ResinExt");
    entityType.setEnhanced(true);

    return entityType;
  }

  /**
   * Introspects.
   */
  private EmbeddableType introspectEmbeddableType(Class type)
    throws ConfigException, SQLException
  {
    getInternalEmbeddableConfig(type, _annotationCfg);
    Embeddable embeddableAnn = (Embeddable) _annotationCfg.getAnnotation();
    EmbeddableConfig embeddableConfig = _annotationCfg.getEmbeddableConfig();

    /*
    if (_annotationCfg.isNull())
      return null;
    */

    String typeName = type.getName();
    EmbeddableType embeddableType
      = _persistenceUnit.createEmbeddable(typeName, type);

    _configManager.addType(type, new EmbeddableConfig(type.getName(), this, embeddableType));

    try {
      boolean isField = isField(type, embeddableConfig);

      if (isField)
        embeddableType.setFieldAccess(true);

      // XXX: jpa/0u21
      Embeddable ann = (Embeddable) type.getAnnotation(javax.persistence.Embeddable.class);

      if (ann == null) {
        isField = true;
        embeddableType.setIdClass(true);
      
	_persistenceUnit.getAmberContainer().addEmbeddable(typeName,
							   embeddableType);
      }

      embeddableType.setInstanceClassName(type.getName() +
                                          "__ResinExt");
      embeddableType.setEnhanced(true);

      if (isField)
        introspectFields(_persistenceUnit, embeddableType, null,
                         type, embeddableConfig, true);
      else
        introspectMethods(_persistenceUnit, embeddableType, null,
                          type, embeddableConfig);

    } catch (ConfigException e) {
      if (embeddableType != null)
	embeddableType.setConfigException(e);

      throw e;
    } catch (RuntimeException e) {
      if (embeddableType != null)
	embeddableType.setConfigException(e);

      throw e;
    }

    return embeddableType;
  }

  private MappedSuperclassConfig introspectEntityConfig(Class type)
    throws SQLException
  {
    getInternalEntityConfig(type, _annotationCfg);