1 /* ForEachNode.java -- 2 Copyright (C) 2004,2006 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package gnu.xml.transform; 39 40 import gnu.java.lang.CPStringBuilder; 41 42 import java.util.ArrayList; 43 import java.util.Collection; 44 import java.util.Collections; 45 import java.util.Iterator; 46 import java.util.List; 47 import javax.xml.namespace.QName; 48 import javax.xml.transform.TransformerException; 49 import org.w3c.dom.Node; 50 import gnu.xml.xpath.Expr; 51 52 /** 53 * A template node representing an XSLT <code>for-each</code> instruction. 54 * 55 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 56 */ 57 final class ForEachNode 58 extends TemplateNode 59 { 60 61 final Expr select; 62 final List<SortKey> sortKeys; 63 ForEachNode(Expr select, List<SortKey> sortKeys)64 ForEachNode(Expr select, List<SortKey> sortKeys) 65 { 66 this.select = select; 67 this.sortKeys = sortKeys; 68 } 69 clone(Stylesheet stylesheet)70 TemplateNode clone(Stylesheet stylesheet) 71 { 72 int len = sortKeys.size(); 73 List<SortKey> sortKeys2 = new ArrayList<SortKey>(len); 74 for (int i = 0; i < len; i++) 75 sortKeys2.add(sortKeys.get(i).clone(stylesheet)); 76 TemplateNode ret = new ForEachNode(select.clone(stylesheet), 77 sortKeys2); 78 if (children != null) 79 ret.children = children.clone(stylesheet); 80 if (next != null) 81 ret.next = next.clone(stylesheet); 82 return ret; 83 } 84 85 @Override doApply(Stylesheet stylesheet, QName mode, Node context, int pos, int len, Node parent, Node nextSibling)86 void doApply(Stylesheet stylesheet, QName mode, 87 Node context, int pos, int len, 88 Node parent, Node nextSibling) 89 throws TransformerException 90 { 91 if (children != null) 92 { 93 // Set current template to null 94 Template saved = stylesheet.currentTemplate; 95 stylesheet.currentTemplate = null; 96 Object ret = select.evaluate(context, pos, len); 97 //System.err.println(toString() + ": " + context+" -> "+ret); 98 if (ret instanceof Collection) 99 { 100 /* Suppression is safe, as we know context produces Collection<Node> */ 101 @SuppressWarnings("unchecked") 102 Collection<Node> ns = (Collection<Node>) ret; 103 List<Node> list = new ArrayList<Node>(ns); 104 if (!sortKeys.isEmpty()) 105 { 106 for (SortKey sortKey : sortKeys) 107 { 108 sortKey.init(stylesheet, mode, context, pos, len, parent, 109 nextSibling); 110 } 111 Collections.sort(list, new XSLComparator(sortKeys)); 112 } 113 else 114 Collections.sort(list, documentOrderComparator); 115 // Perform children for each node 116 int l = list.size(); 117 int p = 1; 118 for (Node node : list) 119 { 120 stylesheet.current = node; 121 children.apply(stylesheet, mode, 122 node, p++, l, 123 parent, nextSibling); 124 } 125 } 126 // Restore current template 127 stylesheet.currentTemplate = saved; 128 } 129 if (next != null) 130 next.apply(stylesheet, mode, 131 context, pos, len, 132 parent, nextSibling); 133 } 134 135 @Override references(QName var)136 public boolean references(QName var) 137 { 138 if (select != null && select.references(var)) 139 return true; 140 for (Iterator<SortKey> i = sortKeys.iterator(); i.hasNext(); ) 141 { 142 if (i.next().references(var)) 143 return true; 144 } 145 return super.references(var); 146 } 147 148 @Override toString()149 public String toString() 150 { 151 CPStringBuilder buf = new CPStringBuilder("for-each"); 152 buf.append('['); 153 buf.append("select="); 154 buf.append(select); 155 buf.append(']'); 156 return buf.toString(); 157 } 158 159 } 160