/*
* @(#)$Id: Doc.java 3619 2008-03-26 07:23:03Z yui $
*
* Copyright 2006-2008 Makoto YUI
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Contributors:
* Makoto YUI - initial implementation
*/
package xbird.xquery.func.doc;
import java.net.*;
import xbird.xquery.DynamicError;
import xbird.xquery.XQueryException;
import xbird.xquery.dm.instance.XQueryDataModel;
import xbird.xquery.dm.instance.DocumentTableModel.DTMDocument;
import xbird.xquery.dm.value.Item;
import xbird.xquery.dm.value.Sequence;
import xbird.xquery.dm.value.sequence.ValueSequence;
import xbird.xquery.func.BuiltInFunction;
import xbird.xquery.func.FunctionSignature;
import xbird.xquery.meta.DynamicContext;
import xbird.xquery.misc.DocumentManager;
import xbird.xquery.misc.QNameTable.QualifiedName;
import xbird.xquery.type.*;
import xbird.xquery.type.Type.Occurrence;
import xbird.xquery.type.node.DocumentTest;
/**
* fn:doc($uri as xs:string?) as document-node()?.
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class Doc extends BuiltInFunction {
private static final long serialVersionUID = 4068874949328220264L;
public static final String SYMBOL = "fn:doc";
public static final QualifiedName FUNC_NAME = resolve(SYMBOL);
public Doc() {
super(FUNC_NAME, new SequenceType(new DocumentTest(), Occurrence.OCC_ZERO_OR_ONE));
}
protected FunctionSignature[] signatures() {
final FunctionSignature[] s = new FunctionSignature[1];
s[0] = new FunctionSignature(getName(), new Type[] { TypeRegistry.safeGet("xs:string?") });
return s;
}
public Sequence eval(Sequence<? extends Item> contextSeq, ValueSequence argv, DynamicContext dynEnv)
throws XQueryException {
Item docuri = argv.getItem(0);
if(docuri.isEmpty()) {
return XQueryDataModel.createDocument();
} else {
final String docName = docuri.stringValue();
URI baseuri = dynEnv.getStaticContext().getBaseURI();
if(baseuri == null) { // TODO REVIEWME workaround
baseuri = dynEnv.getStaticContext().getSystemBaseURI();
}
final URI resolvedUri = baseuri.resolve(docName);
final URL docurl;
try {
docurl = resolvedUri.toURL();
} catch (MalformedURLException e) {
throw new DynamicError("Malformed URL: " + resolvedUri, e);
}
DocumentManager docmgr = dynEnv.getDocumentManager();
DTMDocument doc = docmgr.loadDocument(docurl, dynEnv);
return doc;
}
}
}