elementcollectionfield.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 1,123 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.field;

import com.caucho.amber.expr.AmberExpr;
import com.caucho.amber.expr.ManyToOneExpr;
import com.caucho.amber.expr.OneToManyExpr;
import com.caucho.amber.expr.PathExpr;
import com.caucho.amber.expr.ElementCollectionExpr;
import com.caucho.amber.query.QueryParser;
import com.caucho.amber.table.LinkColumns;
import com.caucho.amber.table.AmberTable;
import com.caucho.amber.type.AmberType;
import com.caucho.amber.type.ElementType;
import com.caucho.amber.type.EntityType;
import com.caucho.bytecode.JType;
import com.caucho.bytecode.JTypeWrapper;
import com.caucho.config.ConfigException;
import com.caucho.java.JavaWriter;
import com.caucho.util.CharBuffer;
import com.caucho.util.L10N;

import javax.persistence.CascadeType;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Map;
import java.util.Set;
import java.util.logging.Logger;

/**
 * Configuration for a bean's field
 */
public class ElementCollectionField extends AssociationField {
  private static final L10N L = new L10N(ElementCollectionField.class);
  private static final Logger log
    = Logger.getLogger(ElementCollectionField.class.getName());

  private String _mapKey;

  private AmberType _targetType;

  private AmberTable _associationTable;

  private LinkColumns _sourceLink;

  private ArrayList<String> _orderByFields;
  private ArrayList<Boolean> _orderByAscending;

  private ElementType _elementType;

  public ElementCollectionField(EntityType sourceType,
				String name)
    throws ConfigException
  {
    super(sourceType, name, null);

    _elementType = new ElementType(sourceType.getPersistenceUnit(), this);
  }

  /**
   * Gets the map key.
   */
  public String getMapKey()
  {
    return _mapKey;
  }

  /**
   * Sets the map key.
   */
  public void setMapKey(String mapKey)
  {
    _mapKey = mapKey;
  }

  /**
   * Sets the target type.
   */
  @Override
  public void setType(AmberType targetType)
  {
    _targetType = targetType;

    super.setType(targetType);
  }

  /**
   * Returns the source type as
   * entity or mapped-superclass.
   */
  public EntityType getRelatedType()
  {
    return (EntityType) getSourceType();
  }

  /**
   * Returns the type argument for the target
   */
  public AmberType getTargetType()
  {
    return _targetType;
  }

  /**
   * Returns the association table
   */
  public AmberTable getAssociationTable()
  {
    return _associationTable;
  }

  /**
   * Sets the association table
   */
  public void setAssociationTable(AmberTable table)
  {
    _associationTable = table;
  }

  /**
   * Adds a column from the association table to the source side.
   */
  public void setSourceLink(LinkColumns link)
  {
    _sourceLink = link;
  }

  /**
   * Returns the source link.
   */
  public LinkColumns getSourceLink()
  {
    return _sourceLink;
  }

  /**
   * Sets the order by.
   */
  public void setOrderBy(ArrayList<String> orderByFields,
                         ArrayList<Boolean> orderByAscending)
  {
    _orderByFields = orderByFields;
    _orderByAscending = orderByAscending;
  }

  /**
   * Initializes the field.
   */
  @Override
  public void init()
    throws ConfigException
  {
  }

  /**
   * Generates the set clause.
   */
  @Override
  public void generateStatementSet(JavaWriter out, String pstmt,
				   String obj, String index)
    throws IOException
  {
  }

  /**
   * Generates the select clause.
   */
  @Override
  public String generateLoadSelect(String id)
  {
    return id + "." + getName();
  }

  /**
   * Generates loading code after the basic fields.
   */
  @Override
  public int generatePostLoadSelect(JavaWriter out, int index)
    throws IOException
  {
    if (! isLazy()) {
      // jpa/1a02: the size is to force the actual load
      out.println(getGetterName() + "().size();");
    }

    return ++index;
  }

  /**
   * Creates the expression for the field.
   */
  @Override
  public AmberExpr createExpr(QueryParser parser, PathExpr parent)
  {
    return new ElementCollectionExpr(parser, parent, _sourceLink,
				     _elementType);
  }

  /**
   * Updates from the cached copy.
   */
  @Override
  public void generateCopyLoadObject(JavaWriter out,
                                     String dst, String src,
                                     int loadIndex)
    throws IOException
  {
    // jpa/0s2j
    if (dst.equals("item"))
      return;

    String var = "_caucho_field_" + getGetterName();

    // order matters: jpa/0s2k
    String value = var; // generateGet(src);
    out.println(generateSet(dst, value) + ";");

    out.println(generateAccessor(dst, var)
		+ " = " + generateAccessor(src, var) + ";");

    if (! dst.equals("super")) { // || isLazy())) {
      String oThis = "((" + getRelatedType().getInstanceClassName() + ") " + dst + ")";
      out.println(generateSuperSetter(oThis, generateSuperGetter("this")) + ";");
    }
  }

  /**
   * Updates the cached copy.
   */
  @Override
  public void generateMergeFrom(JavaWriter out,
                                      String dst, String src)
    throws IOException
  {
    // jpa/0s2k
    int updateIndex = 0;
    generateCopyLoadObject(out, dst, src, updateIndex);

    out.println();
  }

  /**
   * Generates the set property.
   */
  @Override
  public void generateGetterMethod(JavaWriter out)
    throws IOException
  {
    String var = "_caucho_field_" + getGetterName();

    boolean isSet = getJavaType().isAssignableTo(Set.class);
    boolean isMap = false;
    if (!isSet) {
      isMap = getJavaType().isAssignableTo(Map.class);
    }

    JType type = getJavaType();
    JType []paramArgs = type.getActualTypeArguments();
    JType param = paramArgs.length > 0 ? paramArgs[0] : null;
    JType param2 = paramArgs.length > 1 ? paramArgs[1] : null;

    // jpa/0l44
    out.print("protected ");

    String collectionImpl;

    if (isSet)
      collectionImpl = "com.caucho.amber.collection.SetImpl";
    else if (isMap)
      collectionImpl = "com.caucho.amber.collection.MapImpl";
    else
      collectionImpl = "com.caucho.amber.collection.CollectionImpl";

    out.print(collectionImpl);

    if (param != null) {
      out.print('<' + param.getPrintName());
      
      if (isMap) {
        if (param2 != null) {
          out.print(", " + param2.getPrintName());
        }
      }

      out.print(">");
    }

    out.print(" " + var + ";");

    out.println();
    out.println("public " + getJavaTypeName() + " " + getGetterName() + "()");
    out.println("{");
    out.pushDepth();

    out.println("if (" + var + " != null) {");
    out.pushDepth();

    out.println("if (__caucho_state.isPersist()) {");
    out.pushDepth();

    out.println(var + ".setSession(__caucho_session);");

    out.println("return " + var + ";");

    out.popDepth();
    out.println("}");
    out.println();

    // jpa/1622
    out.println("if (" + var + ".getSession() != null");
    out.println("    && " + var + ".getSession() == __caucho_session)");
    out.println("  return " + var + ";");

    out.popDepth();
    out.println("}");

    out.println();
    out.println("com.caucho.amber.AmberQuery query = null;");

    out.println();
    out.println("try {");
    out.pushDepth();

    out.println("if (__caucho_session == null) {");
    out.pushDepth();

    String newEmptyCollection = "new " + collectionImpl;

    if (param != null) {
      newEmptyCollection += "<" + param.getPrintName();
      if (isMap) {
        newEmptyCollection += ", ";
        newEmptyCollection += param2.getPrintName();
      }
      newEmptyCollection += ">";
    }

    newEmptyCollection += "(query";
    if (isMap) {
      newEmptyCollection += "," + getTargetType().getJavaTypeName();
      newEmptyCollection += ".class.getDeclaredMethod(\"get";
      String getterMapKey = getMapKey();
      getterMapKey = Character.toUpperCase(getterMapKey.charAt(0)) + getterMapKey.substring(1);
      newEmptyCollection += getterMapKey; // "getId");
      newEmptyCollection += "\", (Class []) null)";
    }
    newEmptyCollection += ")";

    // jpa/0s2k, jpa/1622
    out.println("if (" + var + " == null)");
    out.println("  " + var + " = " + newEmptyCollection + ";");

    // if (! isAbstract())
    out.println();
    out.println("return " + var + ";");

    out.popDepth();
    out.println("}");

    out.println();
    out.print("String sql=\"");

    out.print("SELECT c");
    out.print(" FROM " + getSourceType().getName() + " o,");
    out.print("  IN(o." + getName() + ") c");
    out.print(" WHERE ");
    out.print(getRelatedType().getId().generateRawWhere("o"));

    if (_orderByFields != null) {
      out.print(" ORDER BY ");

      for (int i = 0; i < _orderByFields.size(); i++) {
        if (i != 0)
          out.print(", ");

        out.print("c." + _orderByFields.get(i));
        if (Boolean.FALSE.equals(_orderByAscending.get(i)))
          out.print(" DESC");
      }
    }

    out.println("\";");
    out.println("query = __caucho_session.prepareQuery(sql);");

    out.println("int index = 1;");
    getRelatedType().getId().generateSet(out, "query", "index", "this");

    // Ex: _caucho_getChildren = new com.caucho.amber.collection.CollectionImpl
    out.print(var);
    out.print(" = " + newEmptyCollection + ";");

    /*
      out.pushDepth();

      generateAdd(out);
      generateRemove(out);
      generateClear(out);
      // generateSize(out);

      out.popDepth();
      out.println("};");
    */

    out.println();

    // jpa/0i5g
    /*
    out.print(var + "_added = ");
    out.println("new java.util.HashSet<" + getTargetType().getJavaTypeName() + ">();");

    if (isMap)
      out.print(var + "_added.addAll(" + var + ".values());");
    else
      out.println(var + "_added.addAll(" + var + ");");
    */

    out.println();
    out.println("return " + var + ";");

    out.popDepth();
    out.println("} catch (Exception e) {");
    out.println("  throw com.caucho.amber.AmberRuntimeException.create(e);");
    out.println("}");

    out.popDepth();
    out.println("}");

    generateAmberAdd(out);
    generateAmberRemove(out);
    generateAmberRemoveTargetAll(out);
  }


  /**
   * Generates the set property.
   */
  private void generateAdd(JavaWriter out)
    throws IOException
  {
    JType type = getJavaType();
    JType []paramArgs = type.getActualTypeArguments();
    String gType = paramArgs.length > 0 ? paramArgs[0].getPrintName() : "Object";

    out.println("public boolean add(" + gType + " o)");
    out.println("{");
    out.pushDepth();

    String ownerType = getRelatedType().getInstanceClassName();

    out.println("if (! (o instanceof " + ownerType + "))");
    out.println("  throw new java.lang.IllegalArgumentException((o == null ? \"null\" : o.getClass().getName()) + \" must be a " + ownerType + "\");");

    out.println(ownerType + " bean = (" + ownerType + ") o;");

    // XXX: makePersistent

    /*
      ArrayList<Column> keyColumns = getKeyColumns();
      for (int i = 0; i < keyColumns.size(); i++) {
      Column column = keyColumns.get(i);
      AbstractProperty prop = column.getProperty();


      if (prop != null) {
      out.println("bean." + prop.getSetterName() + "(" + ownerType + "__ResinExt.this);");
      }
      }
    */

    out.println("return true;");

    out.popDepth();
    out.println("}");
  }

  /**
   * Generates the set property.
   */
  private void generateRemove(JavaWriter out)
    throws IOException
  {
    JType type = getJavaType();
    JType []paramArgs = type.getActualTypeArguments();
    String gType = paramArgs.length > 0 ? paramArgs[0].getPrintName() : "Object";

    out.println("public boolean remove(" + gType + " o)");
    out.println("{");
    out.pushDepth();

    String ownerType = getSourceType().getInstanceClassName();

    out.println("if (! (o instanceof " + ownerType + "))");
    out.println("  throw new java.lang.IllegalArgumentException((o == null ? \"null\" : o.getClass().getName()) + \" must be a " + ownerType + "\");");

    out.println(ownerType + " bean = (" + ownerType + ") o;");

    // XXX: makePersistent

    /*
      ArrayList<Column> keyColumns = getKeyColumns();
      for (int i = 0; i < keyColumns.size(); i++) {
      Column column = keyColumns.get(i);
      AbstractProperty prop = column.getProperty();

      if (prop != null) {
      out.println("bean." + prop.getSetterName() + "(null);");
      }
      }
    */

    out.println("return true;");

    out.popDepth();
    out.println("}");
  }

  /**
   * Generates the clear method.
   */
  private void generateClear(JavaWriter out)
    throws IOException
  {
    out.println("public void clear()");
    out.println("{");
    out.pushDepth();

    out.println("if (__caucho_session != null) {");
    out.pushDepth();

    out.println("try {");
    out.pushDepth();

    out.println("__caucho_session.flushNoChecks();");