Package com.caucho.amber.field

Source Code of com.caucho.amber.field.StubMethod

/*
* Copyright (c) 1998-2011 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.bytecode.JClass;
import com.caucho.bytecode.JMethod;
import com.caucho.config.ConfigException;
import com.caucho.java.JavaWriter;
import com.caucho.util.L10N;
import com.caucho.util.Log;

import java.io.IOException;
import java.util.logging.Logger;

/**
* The stub method is needed in particular to support EJB/CMP and ejbSelect
*/
public class StubMethod {
  private static final L10N L = new L10N(StubMethod.class);
  protected static final Logger log = Log.open(StubMethod.class);

  private JMethod _method;

  public StubMethod(JMethod method)
  {
    _method = method;
  }

  /**
   * Initializes the method.
   */
  public void init()
    throws ConfigException
  {
  }

  /**
   * Generates the stub
   */
  public void generate(JavaWriter out)
    throws IOException
  {
    out.println();
    out.print("public ");
    out.print(_method.getReturnType().getPrintName());
    out.print(" " + _method.getName() + "(");

    JClass []paramTypes = _method.getParameterTypes();
    for (int i = 0; i < paramTypes.length; i++) {
      if (i != 0)
        out.print(", ");

      out.print(paramTypes[i].getPrintName());
      out.print(" a" + i);
    }
    out.println(")");

    JClass []exnTypes = _method.getExceptionTypes();
    for (int i = 0; i < exnTypes.length; i++) {
      if (i == 0)
        out.print("  throws ");
      else
        out.print(", ");

      out.print(exnTypes[i].getPrintName());
    }
    if (exnTypes.length > 0)
      out.println();
   
    out.println("{");
    JClass retType = _method.getReturnType();

    if ("void".equals(retType.getName())) {
    }
    else if (retType.isPrimitive())
      out.println("  return 0;");
    else
      out.println("  return null;");
   
    out.println("}");
  }
}
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