/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.xsl.java;
import com.caucho.java.JavaWriter;
import com.caucho.xml.QName;
import com.caucho.xpath.pattern.AbstractPattern;
import com.caucho.xsl.Sort;
import com.caucho.xsl.XslParseException;
import java.util.ArrayList;
/**
* Represents the xsl:for-each element.
*/
public class XslForEach extends XslNode {
private String _select;
private ArrayList<XslSort> _sorts = new ArrayList<XslSort>();
/**
* Adds an attribute.
*/
public void addAttribute(QName name, String value)
throws XslParseException
{
if (name.getName().equals("select")) {
_select = value;
}
else
super.addAttribute(name, value);
}
/**
* Ends the attributes.
*/
public void endAttributes()
throws XslParseException
{
/*
if (_select == null)
throw error(L.l("<xsl:for-each> requires a 'select' attribute."));
*/
}
/**
* Adds a child node.
*/
public void addChild(XslNode node)
throws XslParseException
{
if (node instanceof XslSort) {
_sorts.add((XslSort) node);
}
else
super.addChild(node);
}
/**
* Generates the code for the tag
*
* @param out the output writer for the generated java.
*/
public void generate(JavaWriter out)
throws Exception
{
if (_sorts.size() != 0) {
printForEachSort(out);
return;
}
out.println("{");
out.pushDepth();
AbstractPattern select = parseSelect(_select);
boolean hasExprEnv = ! allowJavaSelect(select);
int id = _gen.generateId();
String sel = "_xsl_sel" + id;
String oldCxt = "_xsl_cxt" + id;
String oldCur = "_xsl_cur" + id;
String oldSel = "_xsl_old_sel" + id;
String oldEnv = "_xsl_env" + id;
String oldSize = "_xsl_old_size" + id;
out.println("com.caucho.xpath.pattern.AbstractPattern " + sel + ";");
out.print(sel + " = _select_patterns[");
out.print(_gen.addSelect(select));
out.println("];");
out.println("Node " + oldCxt + " = env.getContextNode();");
out.println("Node " + oldCur + " = env.getCurrentNode();");
if (! hasExprEnv) {
out.println("AbstractPattern " + oldSel + " = env.setSelect(node, " + sel + ");");
out.println("int " + oldSize + " = env.setContextSize(0);");
}
// String pos = "_xsl_pos" + unique++;
String iter = "_xsl_iter" + _gen.generateId();
int oldSelectDepth = _gen.getSelectDepth();
// println("int " + pos + " = 0;");
boolean hasEnv = false;
if (allowJavaSelect(select)) {
out.println("ExprEnvironment " + oldEnv + " = env.setExprEnv(null);");
String ptr = printSelectBegin(out, select, true, null);
_gen.pushLoop();
out.println("Node " + _gen.getElement() + " = node;");
out.println("node = " + ptr + ";");
}
else {
out.print("NodeIterator " + iter + " = " + sel);
out.println(".select(node, " + getEnv() + ");");
out.println("ExprEnvironment " + oldEnv + " = env.setExprEnv(" + iter + ");");
out.println("while (" + iter + ".hasNext()) {");
out.pushDepth();
_gen.setSelectDepth(_gen.getSelectDepth() + 1);
_gen.pushLoop();
out.println("Node " + _gen.getElement() + " = node;");
out.println("node = " + iter + ".nextNode();");
}
out.println("env.setCurrentNode(node);");
// println(pos + "++;");
// String oldPos = currentPos;
// currentPos = pos;
AbstractPattern oldNodeListContext = _gen.getNodeListContext();
_gen.setNodeListContext(parseMatch(_select));
generateChildren(out);
_gen.setNodeListContext(oldNodeListContext);
// currentPos = oldPos;
out.println("node = " + _gen.getElement() + ";");
out.println("env.setCurrentNode(" + oldCur + ");");
int selectDepth = _gen.getSelectDepth();
for (; selectDepth > oldSelectDepth; selectDepth--) {
out.popDepth();
out.println("}");
}
_gen.setSelectDepth(oldSelectDepth);
out.println("env.setExprEnv(" + oldEnv + ");");
if (! hasExprEnv) {
out.println("env.setSelect(" + oldCxt + ", " + oldSel + ");");
out.println("env.setContextSize(" + oldSize + ");");
//println("env.setCurrentNode(node);");
}
out.popDepth();
out.println("}");
_gen.popLoop();
}
/*
public void generate(JavaWriter out)
throws Exception
{
Sort []sort = new Sort[_sorts.size()];
for (int i = 0; i < _sorts.size(); i++)
sort[i] = _sorts.get(i).generateSort();
out.println("{");
out.pushDepth();
AbstractPattern select = parseSelect(_select);
boolean hasExprEnv = ! allowJavaSelect(select);
int id = _gen.generateId();
String sel = "_xsl_sel" + id;
String oldCxt = "_xsl_cxt" + id;
String oldCur = "_xsl_cur" + id;
String oldSel = "_xsl_old_sel" + id;
String oldEnv = "_xsl_env" + id;
out.println("env.setCurrentNode(node);");
String pos = "_xsl_pos" + _gen.generateId();
String list = "_xsl_list" + _gen.generateId();
int sortIndex = _gen.addSort(sort);
println("Node " + oldCxt + " = env.getContextNode();");
println("Node " + oldCur + " = env.getCurrentNode();");
out.println("ArrayList " + list +
" = xslSort(node, env" +
", _select_patterns[" + _gen.addSelect(select) + "]" +
", _xsl_sorts[" + sortIndex + "]);");
out.println("env.setContextSize(" + list + ".size());");
out.println("for (int " + pos + " = 1; " + pos +
" <= " + list + ".size(); " + pos + "++) {");
_gen.pushLoop();
out.pushDepth();
out.println("Node " + _gen.getElement() + " = node;");
out.println("node = (Node) " + list + ".get(" + pos + " - 1);");
String oldPos = _gen.getCurrentPosition();
_gen.setCurrentPosition(pos);
out.println("env.setPosition(" + pos + ");");
AbstractPattern oldNodeListContext = _gen.getNodeListContext();
_gen.setNodeListContext(parseMatch(_select));
generateChildren(out);
_gen.setCurrentPosition(oldPos);
_gen.setNodeListContext(oldNodeListContext);
out.println("node = " + _gen.getElement() + ";");
out.popDepth();
out.println("}");
_gen.popLoop();
out.popDepth();
out.println("}");
}
*/
public void printForEachSort(JavaWriter out)
throws Exception
{
Sort []sort = new Sort[_sorts.size()];
for (int i = 0; i < _sorts.size(); i++)
sort[i] = _sorts.get(i).generateSort();
out.println("{");
out.pushDepth();
AbstractPattern select = parseSelect(_select);
boolean hasExprEnv = ! allowJavaSelect(select);
int id = _gen.generateId();
String sel = "_xsl_sel" + id;
String oldCxt = "_xsl_cxt" + id;
String oldCur = "_xsl_cur" + id;
String oldSel = "_xsl_old_sel" + id;
String oldEnv = "_xsl_env" + id;
out.println("env.setCurrentNode(node);");
String pos = "_xsl_pos" + _gen.generateId();
String list = "_xsl_list" + _gen.generateId();
int sortIndex = _gen.addSort(sort);
out.println("Node " + oldCxt + " = env.getContextNode();");
out.println("Node " + oldCur + " = env.getCurrentNode();");
out.println("ArrayList " + list +
" = xslSort(node, env" +
", _select_patterns[" + _gen.addSelect(select) + "]" +
", _xsl_sorts[" + sortIndex + "]);");
out.println("env.setContextSize(" + list + ".size());");
out.println("for (int " + pos + " = 1; " + pos +
" <= " + list + ".size(); " + pos + "++) {");
_gen.pushLoop();
out.pushDepth();
out.println("Node " + _gen.getElement() + " = node;");
out.println("node = (Node) " + list + ".get(" + pos + " - 1);");
String oldPos = _gen.getCurrentPosition();
_gen.setCurrentPosition(pos);
out.println("env.setPosition(" + pos + ");");
AbstractPattern oldNodeListContext = _gen.getNodeListContext();
_gen.setNodeListContext(parseMatch(_select));
generateChildren(out);
_gen.setCurrentPosition(oldPos);
_gen.setNodeListContext(oldNodeListContext);
out.println("node = " + _gen.getElement() + ";");
out.popDepth();
out.println("}");
_gen.popLoop();
out.popDepth();
out.println("}");
}
}