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    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
    17  package org.apache.commons.jexl.parser;
    18
    19  import org.apache.commons.jexl.JexlContext;
    20
    21  /***
    22   * { code }, a block of statements enclosed in curly braces.
    23   *
    24   * @author Dion Gillard
    25   *
    26   */
    27  public class ASTBlock extends SimpleNode {
    28      /***
    29       * Create the node given an id.
    30       *
    31       * @param id node id.
    32       */
    33      public ASTBlock(int id) {
    34          super(id);
    35      }
    36
    37      /***
    38       * Create a node with the given parser and id.
    39       *
    40       * @param p a parser.
    41       * @param id node id.
    42       */
    43      public ASTBlock(Parser p, int id) {
    44          super(p, id);
    45      }
    46
    47      /*** {@inheritDoc} */
    48      public Object jjtAccept(ParserVisitor visitor, Object data) {
    49          return visitor.visit(this, data);
    50      }
    51
    52      /***
    53       * @return the value of the block. Execute all statements inside and return
    54       *         the value of the last.
    55       * @param context the {@link JexlContext} to execute against.
    56       * @throws Exception on any error.
    57       */
    58      public Object value(JexlContext context) throws Exception {
    59          int numChildren = jjtGetNumChildren();
    60          Object result = null;
    61          for (int i = 0; i < numChildren; i++) {
    62              result = ((SimpleNode) jjtGetChild(i)).value(context);
    63          }
    64          return result;
    65      }
    66
    67  }