/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Id$
*/
package org.exist.xquery.functions.fn;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import java.net.URI;
import java.net.URISyntaxException;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.Dependency;
import org.exist.xquery.ErrorCodes;
import org.exist.xquery.Function;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.Profiler;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.AnyURIValue;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.NodeValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
import org.w3c.dom.Node;
/**
* @author wolf
*/
public class FunBaseURI extends BasicFunction {
protected static final Logger logger = LogManager.getLogger(FunBaseURI.class);
public final static FunctionSignature signatures[] = {
new FunctionSignature(
new QName("base-uri", Function.BUILTIN_FUNCTION_NS),
"Returns the value of the base URI property for the context item.",
null,
new FunctionReturnSequenceType(Type.ANY_URI,
Cardinality.ZERO_OR_ONE, "The base URI from the context item")
),
new FunctionSignature(
new QName("base-uri", Function.BUILTIN_FUNCTION_NS),
"Returns the value of the base URI property for $uri. " +
"If $uri is the empty sequence, the empty sequence is returned.",
new SequenceType[] {
new FunctionParameterSequenceType("uri", Type.NODE,
Cardinality.ZERO_OR_ONE, "The URI")
},
new FunctionReturnSequenceType(Type.ANY_URI,
Cardinality.ZERO_OR_ONE, "the base URI from $uri")
),
new FunctionSignature(
new QName("static-base-uri", Function.BUILTIN_FUNCTION_NS),
"Returns the value of the base URI property from the static context. " +
"If the base-uri property is undefined, the empty sequence is returned.",
null,
new FunctionReturnSequenceType(Type.ANY_URI, Cardinality.ZERO_OR_ONE,
"The base URI from the static context")
)
};
/**
*
*
* @param context
* @param signature
*/
public FunBaseURI(XQueryContext context, FunctionSignature signature) {
super(context, signature);
}
/* (non-Javadoc)
* @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[],
* org.exist.xquery.value.Sequence)
*/
public Sequence eval(Sequence[] args, Sequence contextSequence) 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);}
}
Sequence result = null;
NodeValue node = null;
if (isCalledAs("static-base-uri")) {
if (context.isBaseURIDeclared()) {
result = context.getBaseURI();
if (!((AnyURIValue) result).toURI().isAbsolute()) {
// throw new XPathException(this, ErrorCodes.XPST0001, "");
LOG.debug("URI is not absolute");
result = Sequence.EMPTY_SEQUENCE;
}
} else {
result = Sequence.EMPTY_SEQUENCE;
}
} else {
if (args.length == 0) {
if (contextSequence == null || contextSequence.isEmpty()) {
throw new XPathException(this, ErrorCodes.XPDY0002,
"Context sequence is empty and no argument specified");
}
final Item item = contextSequence.itemAt(0);
if (!Type.subTypeOf(item.getType(), Type.NODE)) {
throw new XPathException(this, ErrorCodes.XPTY0004,
"Context item is not a node");
}
node = (NodeValue) item;
} else {
if (args[0].isEmpty()) {
result = Sequence.EMPTY_SEQUENCE;
} else {
node = (NodeValue) args[0].itemAt(0);
}
}
}
if (result == null && node != null) {
result = Sequence.EMPTY_SEQUENCE;
// This is implemented to be a recursive ascent according to
// section 2.5 in www.w3.org/TR/xpath-functions
// see memtree/ElementImpl and dom/ElementImpl. /ljo
final Node domNode = node.getNode();
final short type = domNode.getNodeType();
//A direct processing instruction constructor creates a processing instruction node
//whose target property is PITarget and whose content property is DirPIContents.
//The base-uri property of the node is empty.
//The parent property of the node is empty.
if (type != Node.DOCUMENT_NODE && domNode.getParentNode() == null)
{
}
else if ((type == Node.PROCESSING_INSTRUCTION_NODE ||
type == Node.COMMENT_NODE) && (domNode.getParentNode() != null
&& domNode.getParentNode().getNodeType() == Node.DOCUMENT_NODE)) {
//Nothing to do
} else if (type == Node.ATTRIBUTE_NODE ||
type == Node.ELEMENT_NODE || type == Node.DOCUMENT_NODE ||
type == Node.PROCESSING_INSTRUCTION_NODE || type == Node.COMMENT_NODE) {
URI relativeURI = null;
URI baseURI = null;
try {
final String uri = domNode.getBaseURI();
if (uri != null) {
relativeURI = new URI(uri);
baseURI = new URI(context.getBaseURI() + "/");
}
} catch (final URISyntaxException e) {
throw new XPathException(e.getMessage());
}
if (relativeURI != null) {
if (!(("".equals(relativeURI.toString()) ||
(type == Node.ATTRIBUTE_NODE && "/db".equals(relativeURI.toString()))))) {
if (relativeURI.isAbsolute()) {
result = new AnyURIValue(relativeURI);
} else {
result = new AnyURIValue(baseURI.resolve(relativeURI));
}
} else {
result = new AnyURIValue(baseURI);
}
}
}
}
if (context.getProfiler().isEnabled())
{context.getProfiler().end(this, "", result);}
return result;
}
}