/*
* 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 org.exist.interpreter.ContextAtExist;
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.xslt.XSLContext;
import org.exist.xslt.pattern.Pattern;
import org.w3c.dom.Attr;
/**
* <!-- Category: instruction -->
* <xsl:for-each-group
* select = expression
* group-by? = expression
* group-adjacent? = expression
* group-starting-with? = pattern
* group-ending-with? = pattern
* collation? = { uri }>
* <!-- Content: (xsl:sort*, sequence-constructor) -->
* </xsl:for-each-group>
*
* @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
*
*/
public class ForEachGroup extends SimpleConstructor {
private PathExpr select = null;
private PathExpr group_by = null;
private PathExpr group_adjacent = null;
private PathExpr group_starting_with = null;
private PathExpr group_ending_with = null;
private String collation = null;
public ForEachGroup(XSLContext context) {
super(context);
}
public void setToDefaults() {
select = null;
group_by = null;
group_adjacent = null;
group_starting_with = null;
group_ending_with = null;
collation = null;
}
public void prepareAttribute(ContextAtExist context, Attr attr) throws XPathException {
String attr_name = attr.getNodeName();
if (attr_name.equals(SELECT)) {
select = new PathExpr(getContext());
Pattern.parse(context, attr.getValue(), select);
} else if (attr_name.equals(GROUP_BY)) {
group_by = new PathExpr(getContext());
Pattern.parse(context, attr.getValue(), group_by);
} else if (attr_name.equals(GROUP_ADJACENT)) {
group_adjacent = new PathExpr(getContext());
Pattern.parse(context, attr.getValue(), group_adjacent);
} else if (attr_name.equals(GROUP_STARTING_WITH)) {
group_starting_with = new PathExpr(getContext());
Pattern.parse(context, attr.getValue(), group_starting_with);
} else if (attr_name.equals(GROUP_ENDING_WITH)) {
group_ending_with = new PathExpr(getContext());
Pattern.parse(context, attr.getValue(), group_ending_with);
} else if (attr_name.equals(COLLATION)) {
collation = attr.getValue();
}
}
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
throw new RuntimeException("eval(Sequence contextSequence, Item contextItem) at "+this.getClass());
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#dump(org.exist.xquery.util.ExpressionDumper)
*/
public void dump(ExpressionDumper dumper) {
dumper.display("<xsl:for-each-group");
if (select != null) {
dumper.display(" select = ");
select.dump(dumper);
}
if (group_by != null) {
dumper.display(" group_by = ");
group_by.dump(dumper);
}
if (group_adjacent != null) {
dumper.display(" group_adjacent = ");
group_adjacent.dump(dumper);
}
if (group_starting_with != null) {
dumper.display(" group_starting_with = ");
group_starting_with.dump(dumper);
}
if (group_ending_with != null) {
dumper.display(" group_ending_with = ");
group_ending_with.dump(dumper);
}
if (collation != null)
dumper.display(" collation = "+collation);
dumper.display("> ");
super.dump(dumper);
dumper.display("</xsl:for-each-group>");
}
public String toString() {
StringBuffer result = new StringBuffer();
result.append("<xsl:for-each-group");
if (select != null)
result.append(" select = "+select.toString());
if (group_by != null)
result.append(" group_by = "+group_by.toString());
if (group_adjacent != null)
result.append(" group_adjacent = "+group_adjacent.toString());
if (group_starting_with != null)
result.append(" group_starting_with = "+group_starting_with.toString());
if (group_ending_with != null)
result.append(" group_ending_with = "+group_ending_with.toString());
if (collation != null)
result.append(" collation = "+collation.toString());
result.append("> ");
result.append(super.toString());
result.append("</xsl:for-each-group>");
return result.toString();
}
}