/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-04 The eXist Team
*
* 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.xquery;
import org.exist.dom.DocumentSet;
import org.exist.dom.NodeProxy;
import org.exist.dom.QName;
import org.exist.xquery.util.ExpressionDumper;
import org.exist.xquery.value.*;
import org.w3c.dom.Node;
/**
* Check element or attribute name to match sequence type.
*
* @author wolf
*/
public class DynamicNameCheck extends AbstractExpression {
final private NameTest test;
final private Expression expression;
public DynamicNameCheck(XQueryContext context, NameTest test, Expression expression) {
super(context);
this.test = test;
this.expression = expression;
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#eval(org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
*/
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
if (context.getProfiler().isEnabled()) {
context.getProfiler().start(this);
context.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
if (contextSequence != null)
context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
if (contextItem != null)
context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
}
Sequence seq = expression.eval(contextSequence, contextItem);
for(SequenceIterator i = seq.iterate(); i.hasNext(); ) {
Item item = i.nextItem();
int itemType = item.getType();
//If item type is "unknown", try to get it from the sequence type
//Should we get a kind of Type.UNKNOWN rather than Type.NODE ?
if (itemType == Type.NODE)
itemType = seq.getItemType();
//Last chance...
if (item instanceof NodeProxy) {
itemType = ((NodeProxy)item).getNodeType();
if (itemType == NodeProxy.UNKNOWN_NODE_TYPE)
//Retrieve the actual node
itemType = ((NodeProxy)item).getNode().getNodeType();
}
if(!Type.subTypeOf(itemType, test.getType())) {
throw new XPathException(expression, "Type error in expression" +
": required type is " + Type.getTypeName(test.getType()) +
"; got: " + Type.getTypeName(item.getType()) + ": " + item.getStringValue());
}
Node node = ((NodeValue) item).getNode();
if(!test.matchesName(node))
throw new XPathException(expression, "Type error in expression: " +
"required node name is " + getPrefixedNodeName(test.getName()) + "; got: " +
getPrefixedNodeName(node));
}
if (context.getProfiler().isEnabled())
context.getProfiler().end(this, "", seq);
return seq;
}
private String getPrefixedNodeName(Node node) {
String prefix = node.getPrefix();
if (prefix == null) {
String nameSpace = node.getNamespaceURI();
if (nameSpace == null) {
return node.getNodeName();
} else {
return "{'" + nameSpace + "'}:" + node.getNodeName();
}
} else if (prefix.length()==0) {
return "{''}:" + node.getNodeName();
} else {
return prefix + ":" + node.getNodeName();
}
}
// TODO should be moved to QName
private String getPrefixedNodeName(QName name) {
String prefix = name.getPrefix();
String localName = name.getLocalName();
if (prefix == null) {
String namespaceURI = name.getNamespaceURI();
if (namespaceURI == null) {
return localName;
} else {
return "{'" + namespaceURI + "'}:" + localName;
}
} else if (prefix.length()==0) {
return "{''}:" + localName;
} else {
return prefix + ":" + localName;
}
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#returnsType()
*/
public int returnsType() {
return test.nodeType;
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#resetState()
*/
public void resetState(boolean postOptimization) {
super.resetState(postOptimization);
expression.resetState(postOptimization);
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#analyze(org.exist.xquery.AnalyzeContextInfo)
*/
public void analyze(AnalyzeContextInfo contextInfo) throws XPathException {
contextInfo.setParent(this);
expression.analyze(contextInfo);
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#dump(org.exist.xquery.util.ExpressionDumper)
*/
public void dump(ExpressionDumper dumper) {
if(dumper.verbosity() > 1) {
dumper.display("dynamic-name-check");
dumper.display("[");
dumper.display(Type.getTypeName(test.nodeType));
dumper.display(", ");
}
expression.dump(dumper);
if(dumper.verbosity() > 1)
dumper.display("]");
}
public String toString() {
StringBuilder result = new StringBuilder();
result.append("dynamic-name-check");
result.append("[");
result.append(Type.getTypeName(test.nodeType));
result.append(", ");
result.append(expression.toString());
result.append("]");
return result.toString();
}
public void setContextDocSet(DocumentSet contextSet) {
super.setContextDocSet(contextSet);
expression.setContextDocSet(contextSet);
}
public void accept(ExpressionVisitor visitor) {
expression.accept(visitor);
}
}