/* eXist Native XML Database
* Copyright (C) 2000-03, Wolfgang M. Meier (wolfgang@exist-db.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Id$
*/
package org.exist.xquery;
import org.exist.xquery.util.ExpressionDumper;
import org.exist.xquery.value.AtomicValue;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceIterator;
import org.exist.xquery.value.StringValue;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* Node constructor for attribute nodes.
*
* @author wolf
*/
public class AttributeConstructor extends NodeConstructor {
final String qname;
public final List<Object> contents = new ArrayList<Object>(5);
boolean isNamespaceDecl = false;
public AttributeConstructor(XQueryContext context, String name) {
super(context);
if(name.startsWith("xmlns"))
{isNamespaceDecl = true;}
this.qname = name;
}
public void addValue(String value) {
contents.add(value);
}
public void addEnclosedExpr(Expression expr) throws XPathException {
if(isNamespaceDecl)
{throw new XPathException(this, "enclosed expressions are not allowed in namespace " +
"declaration attributes");}
contents.add(expr);
}
public String getQName() {
return qname;
}
public boolean isNamespaceDeclaration() {
return isNamespaceDecl;
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#analyze(org.exist.xquery.Expression)
*/
public void analyze(AnalyzeContextInfo contextInfo) throws XPathException {
super.analyze(contextInfo);
contextInfo.setParent(this);
for(final Object next : contents) {
if(next instanceof Expression)
{((Expression)next).analyze(contextInfo);}
}
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#eval(org.exist.xquery.StaticContext, org.exist.dom.DocumentSet, org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
*/
public Sequence eval(
Sequence contextSequence,
Item contextItem)
throws XPathException {
final StringBuilder buf = new StringBuilder();
for(final Object next : contents) {
if(next instanceof Expression)
{evalEnclosedExpr(((Expression)next).eval(contextSequence, contextItem), buf);}
else
{buf.append(next);}
}
//TODO : include that tricky attribute normalization here
final StringValue result = new StringValue(buf.toString());
// String values as expressions are already expanded by
// the parser -- Alex
//result.expand();
return result;
}
private void evalEnclosedExpr(Sequence seq, StringBuilder buf) throws XPathException {
Item item;
AtomicValue atomic;
for(final SequenceIterator i = seq.iterate(); i.hasNext();) {
item = i.nextItem();
atomic = item.atomize();
buf.append(atomic.getStringValue());
if(i.hasNext())
{buf.append(' ');}
}
}
/**
* If this is a namespace declaration attribute, return
* the single string value of the attribute.
*/
public String getLiteralValue() {
if(contents.size() == 0)
{return "";}
return (String)contents.get(0);
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#dump(org.exist.xquery.util.ExpressionDumper)
*/
public void dump(ExpressionDumper dumper) {
dumper.display("attribute ");
//TODO : remove curly braces if Qname
dumper.display("{");
dumper.display(qname);
dumper.display("} ");
dumper.display("{");
dumper.startIndent();
for(final Object next : contents) {
if(next instanceof Expression)
{((Expression)next).dump(dumper);}
else
{dumper.display(next);}
}
dumper.endIndent();
dumper.nl().display("} ");
}
public String toString() {
final StringBuilder result = new StringBuilder();
result.append("attribute ");
//TODO : remove curly braces if Qname
result.append("{");
result.append(qname);
result.append("} ");
result.append("{");
for(final Object next : contents) {
if(next instanceof Expression)
{result.append(next.toString());}
else
{result.append(next.toString());}
}
result.append("} ");
return result.toString();
}
/* (non-Javadoc)
* @see org.exist.xquery.NodeConstructor#resetState()
*/
@Override
public void resetState(boolean postOptimization) {
super.resetState(postOptimization);
for(final Object object : contents) {
if(object instanceof Expression)
{((Expression)object).resetState(postOptimization);}
}
}
public Iterator<Object> contentIterator() {
return contents.iterator();
}
@Override
public void accept(ExpressionVisitor visitor) {
visitor.visitAttribConstructor(this);
}
}