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| org.apache.commons.jexl.parser.ASTForeachStatement | 
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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 java.util.Iterator; | |
| 20 | ||
| 21 |  import org.apache.commons.jexl.JexlContext; | |
| 22 |  import org.apache.commons.jexl.util.Introspector; | |
| 23 |  import org.apache.commons.jexl.util.introspection.Info; | |
| 24 | ||
| 25 |  /** | |
| 26 |   * ForEach statement. Syntax: foreach (var in iterable) Statement() | |
| 27 |   *  | |
| 28 |   * @author Dion Gillard | |
| 29 |   * @since 1.1 | |
| 30 |   */ | |
| 31 | public class ASTForeachStatement extends SimpleNode { | |
| 32 |      /** dummy velocity info. */ | |
| 33 | 1 | private static final Info DUMMY = new Info("", 1, 1); | 
| 34 |      /** index of the loop variable. */ | |
| 35 | private static final int VAR_INDEX = 0; | |
| 36 |      /** index of the items. */ | |
| 37 | private static final int ITEMS_INDEX = 1; | |
| 38 |      /** index of the code to execute. */ | |
| 39 | private static final int STATEMENT_INDEX = 2; | |
| 40 | ||
| 41 | ||
| 42 |      /** | |
| 43 |       * Create the node given an id. | |
| 44 |       *  | |
| 45 |       * @param id node id. | |
| 46 |       */ | |
| 47 | public ASTForeachStatement(int id) { | |
| 48 | 0 |          super(id); | 
| 49 | 0 |      } | 
| 50 | ||
| 51 |      /** | |
| 52 |       * Create a node with the given parser and id. | |
| 53 |       *  | |
| 54 |       * @param p a parser. | |
| 55 |       * @param id node id. | |
| 56 |       */ | |
| 57 | public ASTForeachStatement(Parser p, int id) { | |
| 58 | 10 |          super(p, id); | 
| 59 | 10 | } | 
| 60 | ||
| 61 |      /** {@inheritDoc} */ | |
| 62 |      public Object jjtAccept(ParserVisitor visitor, Object data) { | |
| 63 | 0 |          return visitor.visit(this, data); | 
| 64 | } | |
| 65 | ||
| 66 |      /** {@inheritDoc} */ | |
| 67 |      public Object value(JexlContext jc) throws Exception { | |
| 68 | 10 |          Object result = null; | 
| 69 |          /* first child is the loop variable */ | |
| 70 | 10 | ASTReference loopVariable = (ASTReference) jjtGetChild(VAR_INDEX); | 
| 71 |          /* second child is the variable to iterate */ | |
| 72 | 10 | SimpleNode iterable = (SimpleNode) jjtGetChild(ITEMS_INDEX); | 
| 73 | 10 | Object iterableValue = iterable.value(jc); | 
| 74 |          // make sure there is a value to iterate on and a statement to execute | |
| 75 | 10 | if (iterableValue != null && jjtGetNumChildren() >= (STATEMENT_INDEX + 1)) { | 
| 76 |              /* third child is the statement to execute */ | |
| 77 | 8 | SimpleNode statement = (SimpleNode) jjtGetChild(2); | 
| 78 |              // get an iterator for the collection/array etc via the | |
| 79 |              // introspector. | |
| 80 | 8 | Iterator itemsIterator = Introspector.getUberspect().getIterator( | 
| 81 | iterableValue, DUMMY); | |
| 82 | 123 |              while (itemsIterator.hasNext()) { | 
| 83 |                  // set loopVariable to value of iterator | |
| 84 | 107 | Object value = itemsIterator.next(); | 
| 85 | 107 | jc.getVars().put(loopVariable.getRootString(), value); | 
| 86 |                  // execute statement | |
| 87 | 107 | result = statement.value(jc); | 
| 88 | } | |
| 89 | } | |
| 90 | 10 |          return result; | 
| 91 | } | |
| 92 | } | 
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |