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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/*
* $Id: QName.java 468655 2006-10-28 07:12:06Z minchau $
*/
package org.apache.xml.utils;
import java.util.Stack;
import java.util.StringTokenizer;
import org.apache.xml.res.XMLErrorResources;
import org.apache.xml.res.XMLMessages;
import org.w3c.dom.Element;
/**
* Class to represent a qualified name: "The name of an internal XSLT object,
* specifically a named template (see [7 Named Templates]), a mode (see [6.7 Modes]),
* an attribute set (see [8.1.4 Named Attribute Sets]), a key (see [14.2 Keys]),
* a locale (see [14.3 Number Formatting]), a variable or a parameter (see
* [12 Variables and Parameters]) is specified as a QName. If it has a prefix,
* then the prefix is expanded into a URI reference using the namespace declarations
* in effect on the attribute in which the name occurs. The expanded name
* consisting of the local part of the name and the possibly null URI reference
* is used as the name of the object. The default namespace is not used for
* unprefixed names."
* @xsl.usage general
*/
public class QName implements java.io.Serializable
{
static final long serialVersionUID = 467434581652829920L;
/**
* The local name.
* @serial
*/
protected String _localName;
/**
* The namespace URI.
* @serial
*/
protected String _namespaceURI;
/**
* The namespace prefix.
* @serial
*/
protected String _prefix;
/**
* The XML namespace.
*/
public static final String S_XMLNAMESPACEURI =
"http://www.w3.org/XML/1998/namespace";
/**
* The cached hashcode, which is calculated at construction time.
* @serial
*/
private int m_hashCode;
/**
* Constructs an empty QName.
* 20001019: Try making this public, to support Serializable? -- JKESS
*/
public QName(){}
/**
* Constructs a new QName with the specified namespace URI and
* local name.
*
* @param namespaceURI The namespace URI if known, or null
* @param localName The local name
*/
public QName(String namespaceURI, String localName)
{
this(namespaceURI, localName, false);
}
/**
* Constructs a new QName with the specified namespace URI and
* local name.
*
* @param namespaceURI The namespace URI if known, or null
* @param localName The local name
* @param validate If true the new QName will be validated and an IllegalArgumentException will
* be thrown if it is invalid.
*/
public QName(String namespaceURI, String localName, boolean validate)
{
// This check was already here. So, for now, I will not add it to the validation
// that is done when the validate parameter is true.
if (localName == null)
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_NULL, null)); //"Argument 'localName' is null");
if (validate)
{
if (!XML11Char.isXML11ValidNCName(localName))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_INVALID,null )); //"Argument 'localName' not a valid NCName");
}
}
_namespaceURI = namespaceURI;
_localName = localName;
m_hashCode = toString().hashCode();
}
/**
* Constructs a new QName with the specified namespace URI, prefix
* and local name.
*
* @param namespaceURI The namespace URI if known, or null
* @param prefix The namespace prefix is known, or null
* @param localName The local name
*
*/
public QName(String namespaceURI, String prefix, String localName)
{
this(namespaceURI, prefix, localName, false);
}
/**
* Constructs a new QName with the specified namespace URI, prefix
* and local name.
*
* @param namespaceURI The namespace URI if known, or null
* @param prefix The namespace prefix is known, or null
* @param localName The local name
* @param validate If true the new QName will be validated and an IllegalArgumentException will
* be thrown if it is invalid.
*/
public QName(String namespaceURI, String prefix, String localName, boolean validate)
{
// This check was already here. So, for now, I will not add it to the validation
// that is done when the validate parameter is true.
if (localName == null)
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_NULL, null)); //"Argument 'localName' is null");
if (validate)
{
if (!XML11Char.isXML11ValidNCName(localName))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_INVALID,null )); //"Argument 'localName' not a valid NCName");
}
if ((null != prefix) && (!XML11Char.isXML11ValidNCName(prefix)))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_PREFIX_INVALID,null )); //"Argument 'prefix' not a valid NCName");
}
}
_namespaceURI = namespaceURI;
_prefix = prefix;
_localName = localName;
m_hashCode = toString().hashCode();
}
/**
* Construct a QName from a string, without namespace resolution. Good
* for a few odd cases.
*
* @param localName Local part of qualified name
*
*/
public QName(String localName)
{
this(localName, false);
}
/**
* Construct a QName from a string, without namespace resolution. Good
* for a few odd cases.
*
* @param localName Local part of qualified name
* @param validate If true the new QName will be validated and an IllegalArgumentException will
* be thrown if it is invalid.
*/
public QName(String localName, boolean validate)
{
// This check was already here. So, for now, I will not add it to the validation
// that is done when the validate parameter is true.
if (localName == null)
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_NULL, null)); //"Argument 'localName' is null");
if (validate)
{
if (!XML11Char.isXML11ValidNCName(localName))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_INVALID,null )); //"Argument 'localName' not a valid NCName");
}
}
_namespaceURI = null;
_localName = localName;
m_hashCode = toString().hashCode();
}
/**
* Construct a QName from a string, resolving the prefix
* using the given namespace stack. The default namespace is
* not resolved.
*
* @param qname Qualified name to resolve
* @param namespaces Namespace stack to use to resolve namespace
*/
public QName(String qname, Stack namespaces)
{
this(qname, namespaces, false);
}
/**
* Construct a QName from a string, resolving the prefix
* using the given namespace stack. The default namespace is
* not resolved.
*
* @param qname Qualified name to resolve
* @param namespaces Namespace stack to use to resolve namespace
* @param validate If true the new QName will be validated and an IllegalArgumentException will
* be thrown if it is invalid.
*/
public QName(String qname, Stack namespaces, boolean validate)
{
String namespace = null;
String prefix = null;
int indexOfNSSep = qname.indexOf(':');
if (indexOfNSSep > 0)
{
prefix = qname.substring(0, indexOfNSSep);
if (prefix.equals("xml"))
{
namespace = S_XMLNAMESPACEURI;
}
// Do we want this?
else if (prefix.equals("xmlns"))
{
return;
}
else
{
int depth = namespaces.size();
for (int i = depth - 1; i >= 0; i--)
{
NameSpace ns = (NameSpace) namespaces.elementAt(i);
while (null != ns)
{
if ((null != ns.m_prefix) && prefix.equals(ns.m_prefix))
{
namespace = ns.m_uri;
i = -1;
break;
}
ns = ns.m_next;
}
}
}
if (null == namespace)
{
throw new RuntimeException(
XMLMessages.createXMLMessage(
XMLErrorResources.ER_PREFIX_MUST_RESOLVE,
new Object[]{ prefix })); //"Prefix must resolve to a namespace: "+prefix);
}
}
_localName = (indexOfNSSep < 0)
? qname : qname.substring(indexOfNSSep + 1);
if (validate)
{
if ((_localName == null) || (!XML11Char.isXML11ValidNCName(_localName)))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_INVALID,null )); //"Argument 'localName' not a valid NCName");
}
}
_namespaceURI = namespace;
_prefix = prefix;
m_hashCode = toString().hashCode();
}
/**
* Construct a QName from a string, resolving the prefix
* using the given namespace context and prefix resolver.
* The default namespace is not resolved.
*
* @param qname Qualified name to resolve
* @param namespaceContext Namespace Context to use
* @param resolver Prefix resolver for this context
*/
public QName(String qname, Element namespaceContext,
PrefixResolver resolver)
{
this(qname, namespaceContext, resolver, false);
}
/**
* Construct a QName from a string, resolving the prefix
* using the given namespace context and prefix resolver.
* The default namespace is not resolved.
*
* @param qname Qualified name to resolve
* @param namespaceContext Namespace Context to use
* @param resolver Prefix resolver for this context
* @param validate If true the new QName will be validated and an IllegalArgumentException will
* be thrown if it is invalid.
*/
public QName(String qname, Element namespaceContext,
PrefixResolver resolver, boolean validate)
{
_namespaceURI = null;
int indexOfNSSep = qname.indexOf(':');
if (indexOfNSSep > 0)
{
if (null != namespaceContext)
{
String prefix = qname.substring(0, indexOfNSSep);
_prefix = prefix;
if (prefix.equals("xml"))
{
_namespaceURI = S_XMLNAMESPACEURI;
}
// Do we want this?
else if (prefix.equals("xmlns"))
{
return;
}
else
{
_namespaceURI = resolver.getNamespaceForPrefix(prefix,
namespaceContext);
}
if (null == _namespaceURI)
{
throw new RuntimeException(
XMLMessages.createXMLMessage(
XMLErrorResources.ER_PREFIX_MUST_RESOLVE,
new Object[]{ prefix })); //"Prefix must resolve to a namespace: "+prefix);
}
}
else
{
// TODO: error or warning...
}
}
_localName = (indexOfNSSep < 0)
? qname : qname.substring(indexOfNSSep + 1);
if (validate)
{
if ((_localName == null) || (!XML11Char.isXML11ValidNCName(_localName)))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_INVALID,null )); //"Argument 'localName' not a valid NCName");
}
}
m_hashCode = toString().hashCode();
}
/**
* Construct a QName from a string, resolving the prefix
* using the given namespace stack. The default namespace is
* not resolved.
*
* @param qname Qualified name to resolve
* @param resolver Prefix resolver for this context
*/
public QName(String qname, PrefixResolver resolver)
{
this(qname, resolver, false);
}
/**
* Construct a QName from a string, resolving the prefix
* using the given namespace stack. The default namespace is
* not resolved.
*
* @param qname Qualified name to resolve
* @param resolver Prefix resolver for this context
* @param validate If true the new QName will be validated and an IllegalArgumentException will
* be thrown if it is invalid.
*/
public QName(String qname, PrefixResolver resolver, boolean validate)
{
String prefix = null;
_namespaceURI = null;
int indexOfNSSep = qname.indexOf(':');
if (indexOfNSSep > 0)
{
prefix = qname.substring(0, indexOfNSSep);
if (prefix.equals("xml"))
{
_namespaceURI = S_XMLNAMESPACEURI;
}
else
{
_namespaceURI = resolver.getNamespaceForPrefix(prefix);
}
if (null == _namespaceURI)
{
throw new RuntimeException(
XMLMessages.createXMLMessage(
XMLErrorResources.ER_PREFIX_MUST_RESOLVE,
new Object[]{ prefix })); //"Prefix must resolve to a namespace: "+prefix);
}
_localName = qname.substring(indexOfNSSep + 1);
}
else if (indexOfNSSep == 0)
{
throw new RuntimeException(
XMLMessages.createXMLMessage(
XMLErrorResources.ER_NAME_CANT_START_WITH_COLON,
null));
}
else
{
_localName = qname;
}
if (validate)
{
if ((_localName == null) || (!XML11Char.isXML11ValidNCName(_localName)))
{
throw new IllegalArgumentException(XMLMessages.createXMLMessage(
XMLErrorResources.ER_ARG_LOCALNAME_INVALID,null )); //"Argument 'localName' not a valid NCName");
}
}
m_hashCode = toString().hashCode();
_prefix = prefix;
}
/**
* Returns the namespace URI. Returns null if the namespace URI
* is not known.
*
* @return The namespace URI, or null
*/
public String getNamespaceURI()
{
return _namespaceURI;
}
/**
* Returns the namespace prefix. Returns null if the namespace
* prefix is not known.
*
* @return The namespace prefix, or null
*/
public String getPrefix()
{
return _prefix;
}
/**
* Returns the local part of the qualified name.
*
* @return The local part of the qualified name
*/
public String getLocalName()
{
return _localName;
}
/**
* Return the string representation of the qualified name, using the
* prefix if available, or the '{ns}foo' notation if not. Performs
* string concatenation, so beware of performance issues.
*
* @return the string representation of the namespace
*/
public String toString()
{
return _prefix != null
? (_prefix + ":" + _localName)
: (_namespaceURI != null
? ("{"+_namespaceURI + "}" + _localName) : _localName);
}
/**
* Return the string representation of the qualified name using the
* the '{ns}foo' notation. Performs
* string concatenation, so beware of performance issues.
*
* @return the string representation of the namespace
*/
public String toNamespacedString()
{
return (_namespaceURI != null
? ("{"+_namespaceURI + "}" + _localName) : _localName);
}
/**
* Get the namespace of the qualified name.
*
* @return the namespace URI of the qualified name
*/
public String getNamespace()
{
return getNamespaceURI();
}
/**
* Get the local part of the qualified name.
*
* @return the local part of the qualified name
*/
public String getLocalPart()
{
return getLocalName();
}
/**
* Return the cached hashcode of the qualified name.
*
* @return the cached hashcode of the qualified name
*/
public int hashCode()
{
return m_hashCode;
}
/**
* Override equals and agree that we're equal if
* the passed object is a string and it matches
* the name of the arg.
*
* @param ns Namespace URI to compare to
* @param localPart Local part of qualified name to compare to
*
* @return True if the local name and uri match
*/
public boolean equals(String ns, String localPart)
{
String thisnamespace = getNamespaceURI();
return getLocalName().equals(localPart)
&& (((null != thisnamespace) && (null != ns))
? thisnamespace.equals(ns)
: ((null == thisnamespace) && (null == ns)));
}
/**
* Override equals and agree that we're equal if
* the passed object is a QName and it matches
* the name of the arg.
*
* @return True if the qualified names are equal
*/
public boolean equals(Object object)
{
if (object == this)
return true;
if (object instanceof QName) {
QName qname = (QName) object;
String thisnamespace = getNamespaceURI();
String thatnamespace = qname.getNamespaceURI();
return getLocalName().equals(qname.getLocalName())
&& (((null != thisnamespace) && (null != thatnamespace))
? thisnamespace.equals(thatnamespace)
: ((null == thisnamespace) && (null == thatnamespace)));
}
else
return false;
}
/**
* Given a string, create and return a QName object
*
*
* @param name String to use to create QName
*
* @return a QName object
*/
public static QName getQNameFromString(String name)
{
StringTokenizer tokenizer = new StringTokenizer(name, "{}", false);
QName qname;
String s1 = tokenizer.nextToken();
String s2 = tokenizer.hasMoreTokens() ? tokenizer.nextToken() : null;
if (null == s2)
qname = new QName(null, s1);
else
qname = new QName(s1, s2);
return qname;
}
/**
* This function tells if a raw attribute name is a
* xmlns attribute.
*
* @param attRawName Raw name of attribute
*
* @return True if the attribute starts with or is equal to xmlns
*/
public static boolean isXMLNSDecl(String attRawName)
{
return (attRawName.startsWith("xmlns")
&& (attRawName.equals("xmlns")
|| attRawName.startsWith("xmlns:")));
}
/**
* This function tells if a raw attribute name is a
* xmlns attribute.
*
* @param attRawName Raw name of attribute
*
* @return Prefix of attribute
*/
public static String getPrefixFromXMLNSDecl(String attRawName)
{
int index = attRawName.indexOf(':');
return (index >= 0) ? attRawName.substring(index + 1) : "";
}
/**
* Returns the local name of the given node.
*
* @param qname Input name
*
* @return Local part of the name if prefixed, or the given name if not
*/
public static String getLocalPart(String qname)
{
int index = qname.indexOf(':');
return (index < 0) ? qname : qname.substring(index + 1);
}
/**
* Returns the local name of the given node.
*
* @param qname Input name
*
* @return Prefix of name or empty string if none there
*/
public static String getPrefixPart(String qname)
{
int index = qname.indexOf(':');
return (index >= 0) ? qname.substring(0, index) : "";
}
}
