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    1   /*
    2    * Copyright 2003,2004 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  package org.apache.commons.jexl.parser;
    17
    18  import org.apache.commons.jexl.JexlContext;
    19
    20  /***
    21   * Size Method, e.g. size().
    22   *
    23   * @author <a href="mailto:mhw@kremvax.net">Mark H. Wilkinson</a>
    24   * @version $Id: ASTSizeMethod.java 398324 2006-04-30 12:20:24Z dion $
    25   */
    26  public class ASTSizeMethod extends SimpleNode {
    27      /***
    28       * Create the node given an id.
    29       *
    30       * @param id node id.
    31       */
    32      public ASTSizeMethod(int id) {
    33          super(id);
    34      }
    35
    36      /***
    37       * Create a node with the given parser and id.
    38       *
    39       * @param p a parser.
    40       * @param id node id.
    41       */
    42      public ASTSizeMethod(Parser p, int id) {
    43          super(p, id);
    44      }
    45
    46      /*** {@inheritDoc} */
    47      public Object jjtAccept(ParserVisitor visitor, Object data) {
    48          return visitor.visit(this, data);
    49      }
    50
    51      /***
    52       * evaluate size as part of an expression on a base object.
    53       *
    54       * foo.bar.size
    55       *
    56       * @param jc the {@link JexlContext} to evaluate against.
    57       * @param obj not used.
    58       * @return the value of the array expression.
    59       * @throws Exception on any error
    60       */
    61      public Object execute(Object obj, JexlContext jc) throws Exception {
    62          return new Integer(ASTSizeFunction.sizeOf(obj));
    63      }
    64
    65  }