1 /* 2 * Copyright (C) 2010 Google Inc. 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 com.google.clearsilver.jsilver.functions.structure; 18 19 import com.google.clearsilver.jsilver.data.Data; 20 import com.google.clearsilver.jsilver.functions.NonEscapingFunction; 21 import com.google.clearsilver.jsilver.values.Value; 22 import static com.google.clearsilver.jsilver.values.Value.literalConstant; 23 import com.google.clearsilver.jsilver.values.VariableValue; 24 25 /** 26 * Returns the number of child nodes for the HDF variable. 27 */ 28 public class SubcountFunction extends NonEscapingFunction { 29 30 /** 31 * @param args A variable value referring to an HDF node 32 * @return Number of children 33 */ 34 public Value execute(Value... args) { 35 VariableValue arg = (VariableValue) args[0]; 36 if (arg.getReference() == null) { 37 return literalConstant(0, arg); 38 } 39 40 Data thisNode = arg.getReference().getSymlink(); 41 return literalConstant(thisNode.getChildCount(), arg); 42 } 43 44 } 45
