/*
* @(#)$Id: QNameUtil.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.misc;
import javax.xml.XMLConstants;
import xbird.util.xml.NamespaceBinder;
import xbird.util.xml.XMLUtils;
import xbird.xquery.XQueryException;
import xbird.xquery.misc.QNameTable.QualifiedName;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class QNameUtil {
private QNameUtil() {}
public static QualifiedName parse(String qname, NamespaceBinder namespaceContext, String defaultNamespace)
throws XQueryException {
assert (qname != null) : "Given QName is null.";
assert (namespaceContext != null) : "Given namespaceContext is null.";
final String localPart;
final String prefix;
final String namespaceURI;
final int pos = qname.indexOf(':');
if(pos == -1) { // has no prefix
localPart = qname;
prefix = "";
namespaceURI = (defaultNamespace == null) ? namespaceContext.getNamespaceURI(prefix)
: defaultNamespace;
} else { // has prefix
prefix = qname.substring(0, pos);
localPart = qname.substring(pos + 1);
if(prefix.length() == 0) {
throw new IllegalArgumentException("Invalid QName expression: " + qname);
}
namespaceURI = namespaceContext.getNamespaceURI(prefix);
if(namespaceURI == null) {
throw new XQueryException("err:XPST0081", "invalid namespace prefix: " + prefix);
}
}
return QNameTable.instantiate(namespaceURI, localPart, prefix);
}
public static QualifiedName parse(String qname, NamespaceBinder namespaces) {
try {
return parse(qname, namespaces, null);
} catch (XQueryException e) {
throw new IllegalArgumentException("Unable to resolve QName: " + qname);
}
}
public static QualifiedName parse(String qname, String nsuri) {
assert (qname != null);
final int pos = qname.indexOf(':');
if(pos == -1) {
return QNameTable.instantiate(nsuri, qname);
} else {
final String prefix = qname.substring(0, pos);
final String lpart = qname.substring(pos + 1);
return QNameTable.instantiate(nsuri, lpart, prefix);
}
}
public static QualifiedName resolveNSAttrName(String prefix, NamespaceBinder namespaceContext, String defaultNamespace)
throws XQueryException {
assert (namespaceContext != null) : "Given namespaceContext is null.";
if(prefix == null || prefix.length() == 0) {
return QNameTable.instantiate(defaultNamespace == null ? XMLConstants.DEFAULT_NS_PREFIX
: defaultNamespace, XMLConstants.XMLNS_ATTRIBUTE);
} else {
return QNameTable.instantiate(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, prefix, XMLConstants.XMLNS_ATTRIBUTE);
}
}
public static String toNamespaceDecl(QualifiedName name) {
final String prefix = name.getPrefix();
final String lpart = name.getLocalPart();
assert (lpart != null);
// xmlns:xxx || xmlns
if((prefix == null || prefix.length() == 0) && lpart.equals("xmlns")) {
return "xmlns";
} else if(prefix.equals("xmlns")) {
return "xmlns:" + lpart;
} else {
throw new IllegalStateException("Invalid QName as namespace name: " + name);
}
}
public static String toLexicalForm(QualifiedName name) {
assert (name != null);
final String prefix = name.getPrefix();
final String lpart = name.getLocalPart();
if(prefix == null || prefix.length() == 0) {
return lpart;
} else {
return prefix + ':' + lpart;
}
}
public static boolean isSame(QualifiedName qname, String nsuri, String name) {
assert (qname != null && name != null);
if(nsuri == null) {
nsuri = XMLUtils.NULL_NS_URI;
}
if(nsuri.equals(qname.getNamespaceURI()) && name.equals(qname.getLocalPart())) {
return true;
}
return false;
}
}