View Javadoc

    1   /*
    2    * Copyright 2002-2006 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   * represents an integer.
    22   *
    23   * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
    24   * @version $Id: ASTIntegerLiteral.java 398202 2006-04-29 16:40:34Z dion $
    25   */
    26  public class ASTIntegerLiteral extends SimpleNode {
    27      /*** literal value. */
    28      protected Integer val;
    29
    30      /***
    31       * Create the node given an id.
    32       *
    33       * @param id node id.
    34       */
    35      public ASTIntegerLiteral(int id) {
    36          super(id);
    37      }
    38
    39      /***
    40       * Create a node with the given parser and id.
    41       *
    42       * @param p a parser.
    43       * @param id node id.
    44       */
    45      public ASTIntegerLiteral(Parser p, int id) {
    46          super(p, id);
    47      }
    48
    49      /*** {@inheritDoc} */
    50      public Object jjtAccept(ParserVisitor visitor, Object data) {
    51          return visitor.visit(this, data);
    52      }
    53
    54      /***
    55       * Part of reference resolution - wierd... in JSTL EL you can have foo.2
    56       * which is equiv to foo[2] it appears...
    57       *
    58       * @param obj the object to evaluate against.
    59       * @param ctx the {@link JexlContext}.
    60       * @throws Exception on any error.
    61       * @return the resulting value.
    62       * @see ASTArrayAccess#evaluateExpr(Object, Object)
    63       */
    64      public Object execute(Object obj, JexlContext ctx) throws Exception {
    65          return ASTArrayAccess.evaluateExpr(obj, val);
    66      }
    67
    68      /*** {@inheritDoc} */
    69      public Object value(JexlContext jc) throws Exception {
    70          return val;
    71      }
    72  }