/*
* eXist Open Source Native XML Database
* Copyright (C) 2008-2009 The eXist Project
* http://exist-db.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xslt.expression;
import java.util.Iterator;
import org.exist.interpreter.ContextAtExist;
import org.exist.memtree.MemTreeBuilder;
import org.exist.xquery.AnalyzeContextInfo;
import org.exist.xquery.AnyNodeTest;
import org.exist.xquery.Constants;
import org.exist.xquery.Expression;
import org.exist.xquery.LocationStep;
import org.exist.xquery.PathExpr;
import org.exist.xquery.XPathException;
import org.exist.xquery.util.ExpressionDumper;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceIterator;
import org.exist.xquery.value.ValueSequence;
import org.exist.xslt.XSLContext;
import org.exist.xslt.XSLStylesheet;
import org.exist.xquery.XQueryContext;
import org.exist.xslt.pattern.Pattern;
import org.w3c.dom.Attr;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
/**
* <!-- Category: instruction -->
* <xsl:apply-templates
* select? = expression
* mode? = token>
* <!-- Content: (xsl:sort | xsl:with-param)* -->
* </xsl:apply-templates>
*
* @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
*
*/
public class ApplyTemplates extends SimpleConstructor {
private String attr_select = null;
private PathExpr select = null;
private String mode = null;
private static LocationStep anyChild;
public ApplyTemplates(XSLContext context) {
super(context);
anyChild = new LocationStep(getContext(), Constants.CHILD_AXIS, new AnyNodeTest());
}
public void setToDefaults() {
select = null;
mode = null;
}
public void prepareAttribute(ContextAtExist context, Attr attr) throws XPathException {
String attr_name = attr.getNodeName();
if (attr_name.equals(SELECT)) {
attr_select = attr.getValue();
} else if (attr_name.equals(MODE)) {
mode = attr.getValue();
}
}
public void analyze(AnalyzeContextInfo contextInfo) throws XPathException {
super.analyze(contextInfo);
if (attr_select != null) {
select = new PathExpr(getContext());
Pattern.parse(getContext(), attr_select, select);
_check_(select);
}
}
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
Sequence result = new ValueSequence();
Sequence selected;
if (select == null) {
selected = anyChild.eval(contextSequence, contextItem);
} else {
selected = select.eval(contextSequence, contextItem);
}
for (Expression expr : steps) {
if (expr instanceof Sort) {
Sort sort = (Sort) expr;
selected = sort.eval(selected, null);
} else {
throw new XPathException("not suported for now "+expr);//TODO: error?
}
}
XSLStylesheet xslt = getXSLContext().getXSLStylesheet();
int pos = 0;
// for (Item item : selected) {
for (SequenceIterator iterInner = selected.iterate(); iterInner.hasNext();) {
Item item = iterInner.nextItem();
context.setContextPosition(pos);
Sequence res = xslt.templates(selected, item);
if (res == null) {
if (item instanceof Text) {
MemTreeBuilder builder = context.getDocumentBuilder();
builder.characters(item.getStringValue());
result.add(item);
} else if (item instanceof Node) {
res = eval(selected, item); //item.toSequence();//
} else
throw new XPathException("not supported item type");
}
result.addAll(res);
pos++;
}
return result;
}
// public Sequence builtInTemplateRule(Item contextItem) throws XPathException {
// Sequence result = new ValueSequence();
//
// Sequence contextSequence = anyChild.eval(contextItem.toSequence(), contextItem);
//
// context.pushInScopeNamespaces();
// try {
// MemTreeBuilder builder = context.getDocumentBuilder();
// for (Item item : contextSequence) {
// if (item instanceof Text) {
// builder.characters(item.getStringValue());
// result.add(item);
// } else if (item instanceof Node) {
// Sequence res = eval(item.toSequence(), item);
// result.addAll(res);
// }
// }
// } finally {
// context.popInScopeNamespaces();
// }
//
// return result;
// }
/* (non-Javadoc)
* @see org.exist.xquery.Expression#dump(org.exist.xquery.util.ExpressionDumper)
*/
public void dump(ExpressionDumper dumper) {
dumper.display("<xsl:apply-templates");
if (select != null) {
dumper.display(" select = ");
select.dump(dumper);
}
if (mode != null)
dumper.display(" mode = "+mode);
dumper.display("> ");
super.dump(dumper);
dumper.display("</xsl:apply-templates>");
}
public String toString() {
StringBuffer result = new StringBuffer();
result.append("<xsl:apply-templates");
if (select != null)
result.append(" select = "+select.toString());
if (mode != null)
result.append(" mode = "+mode.toString());
result.append("> ");
result.append(super.toString());
result.append("</xsl:apply-templates>");
return result.toString();
}
}