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    1   /*
    2    * Copyright 2002,2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package org.apache.commons.jexl.util.introspection;
    18
    19
    20
    21  /***
    22   *  Method used for regular method invocation
    23   *
    24   *    $foo.bar()
    25   *
    26   *
    27   * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
    28   * @version $Id: VelMethod.java,v 1.3 2004/02/28 13:45:22 yoavs Exp $
    29   */
    30  public interface VelMethod
    31  {
    32      /***
    33       *  invocation method - called when the method invocationshould be
    34       *  preformed and a value returned
    35       */
    36      public Object invoke(Object o, Object[] params)
    37          throws Exception;
    38
    39      /***
    40       *  specifies if this VelMethod is cacheable and able to be
    41       *  reused for this class of object it was returned for
    42       *
    43       *  @return true if can be reused for this class, false if not
    44       */
    45      public boolean isCacheable();
    46
    47      /***
    48       *  returns the method name used
    49       */
    50      public String getMethodName();
    51
    52      /***
    53       *  returns the return type of the method invoked
    54       */
    55      public Class getReturnType();
    56  }