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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family.
This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building
parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is
the reference implementation of XNI but other parser components, configurations, and parsers can be written
using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual.
Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema
1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema
Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for
evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation
of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete
implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML
Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that
it does not yet provide an option to enable normalization checking as described in section 2.13 of this
specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly
serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.
/*
* 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.
*/
package org.apache.xerces.impl.dv.xs;
import org.apache.xerces.impl.dv.InvalidDatatypeValueException;
import org.apache.xerces.impl.dv.ValidationContext;
import org.apache.xerces.util.URI;
/**
* Represent the schema type "anyURI"
*
* @xerces.internal
*
* @author Neeraj Bajaj, Sun Microsystems, inc.
* @author Sandy Gao, IBM
*
* @version $Id: AnyURIDV.java 699892 2008-09-28 21:08:27Z mrglavas $
*/
public class AnyURIDV extends TypeValidator {
private static final URI BASE_URI;
static {
URI uri = null;
try {
uri = new URI("abc://def.ghi.jkl");
} catch (URI.MalformedURIException ex) {
}
BASE_URI = uri;
}
public short getAllowedFacets(){
return (XSSimpleTypeDecl.FACET_LENGTH | XSSimpleTypeDecl.FACET_MINLENGTH | XSSimpleTypeDecl.FACET_MAXLENGTH | XSSimpleTypeDecl.FACET_PATTERN | XSSimpleTypeDecl.FACET_ENUMERATION | XSSimpleTypeDecl.FACET_WHITESPACE );
}
// before we return string we have to make sure it is correct URI as per spec.
// for some types (string and derived), they just return the string itself
public Object getActualValue(String content, ValidationContext context) throws InvalidDatatypeValueException {
// check 3.2.17.c0 must: URI (rfc 2396/2723)
try {
if( content.length() != 0 ) {
// encode special characters using XLink 5.4 algorithm
final String encoded = encode(content);
// Support for relative URLs
// According to Java 1.1: URLs may also be specified with a
// String and the URL object that it is related to.
new URI(BASE_URI, encoded );
}
} catch (URI.MalformedURIException ex) {
throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1", new Object[]{content, "anyURI"});
}
// REVISIT: do we need to return the new URI object?
return content;
}
// which ASCII characters need to be escaped
private static boolean gNeedEscaping[] = new boolean[128];
// the first hex character if a character needs to be escaped
private static char gAfterEscaping1[] = new char[128];
// the second hex character if a character needs to be escaped
private static char gAfterEscaping2[] = new char[128];
private static char[] gHexChs = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
// initialize the above 3 arrays
static {
for (int i = 0; i <= 0x1f; i++) {
gNeedEscaping[i] = true;
gAfterEscaping1[i] = gHexChs[i >> 4];
gAfterEscaping2[i] = gHexChs[i & 0xf];
}
gNeedEscaping[0x7f] = true;
gAfterEscaping1[0x7f] = '7';
gAfterEscaping2[0x7f] = 'F';
char[] escChs = {' ', '<', '>', '"', '{', '}',
'|', '\\', '^', '~', '`'};
int len = escChs.length;
char ch;
for (int i = 0; i < len; i++) {
ch = escChs[i];
gNeedEscaping[ch] = true;
gAfterEscaping1[ch] = gHexChs[ch >> 4];
gAfterEscaping2[ch] = gHexChs[ch & 0xf];
}
}
// To encode special characters in anyURI, by using %HH to represent
// special ASCII characters: 0x00~0x1F, 0x7F, ' ', '<', '>', etc.
// and non-ASCII characters (whose value >= 128).
private static String encode(String anyURI){
int len = anyURI.length(), ch;
StringBuffer buffer = new StringBuffer(len*3);
// for each character in the anyURI
int i = 0;
for (; i < len; i++) {
ch = anyURI.charAt(i);
// if it's not an ASCII character, break here, and use UTF-8 encoding
if (ch >= 128)
break;
if (gNeedEscaping[ch]) {
buffer.append('%');
buffer.append(gAfterEscaping1[ch]);
buffer.append(gAfterEscaping2[ch]);
}
else {
buffer.append((char)ch);
}
}
// we saw some non-ascii character
if (i < len) {
// get UTF-8 bytes for the remaining sub-string
byte[] bytes = null;
byte b;
try {
bytes = anyURI.substring(i).getBytes("UTF-8");
} catch (java.io.UnsupportedEncodingException e) {
// should never happen
return anyURI;
}
len = bytes.length;
// for each byte
for (i = 0; i < len; i++) {
b = bytes[i];
// for non-ascii character: make it positive, then escape
if (b < 0) {
ch = b + 256;
buffer.append('%');
buffer.append(gHexChs[ch >> 4]);
buffer.append(gHexChs[ch & 0xf]);
}
else if (gNeedEscaping[b]) {
buffer.append('%');
buffer.append(gAfterEscaping1[b]);
buffer.append(gAfterEscaping2[b]);
}
else {
buffer.append((char)b);
}
}
}
// If encoding happened, create a new string;
// otherwise, return the orginal one.
if (buffer.length() != len) {
return buffer.toString();
}
else {
return anyURI;
}
}
} // class AnyURIDV