/*
* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.tools.internal.xjc;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.URL;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.ValidatorHandler;
import com.sun.xml.internal.bind.v2.WellKnownNamespace;
import org.xml.sax.SAXException;
/**
* Wraps a JAXP {@link Schema} object and lazily instanciate it.
*
* Also fix bug 6246922.
*
* This object is thread-safe. There should be only one instance of
* this for the whole VM.
*
* @author Kohsuke Kawaguchi
*/
public final class SchemaCache {
private Schema schema;
private final URL source;
public SchemaCache(URL source) {
this.source = source;
}
public ValidatorHandler newValidator() {
synchronized(this) {
if(schema==null) {
try {
schema = SchemaFactory.newInstance(WellKnownNamespace.XML_SCHEMA).newSchema(source);
} catch (SAXException e) {
// we make sure that the schema is correct before we ship.
throw new AssertionError(e);
}
}
}
ValidatorHandler handler = schema.newValidatorHandler();
fixValidatorBug6246922(handler);
return handler;
}
/**
* Fix the bug 6246922 if we are running inside Tiger.
*/
private void fixValidatorBug6246922(ValidatorHandler handler) {
try {
Field f = handler.getClass().getDeclaredField("errorReporter");
f.setAccessible(true);
Object errorReporter = f.get(handler);
Method get = errorReporter.getClass().getDeclaredMethod("getMessageFormatter",String.class);
Object currentFormatter = get.invoke(errorReporter,"http://www.w3.org/TR/xml-schema-1");
if(currentFormatter!=null)
return;
// otherwise attempt to set
Method put = null;
for( Method m : errorReporter.getClass().getDeclaredMethods() ) {
if(m.getName().equals("putMessageFormatter")) {
put = m;
break;
}
}
if(put==null) return; // unable to find the putMessageFormatter
ClassLoader cl = errorReporter.getClass().getClassLoader();
String className = "com.sun.org.apache.xerces.internal.impl.xs.XSMessageFormatter";
Class xsformatter;
if(cl==null) {
xsformatter = Class.forName(className);
} else {
xsformatter = cl.loadClass(className);
}
put.invoke(errorReporter,"http://www.w3.org/TR/xml-schema-1",xsformatter.newInstance());
} catch( Throwable t ) {
// this code is heavily relying on an implementation detail of JAXP RI,
// so any error is likely because of the incompatible change in it.
// don't die if that happens. Just continue. The worst case is a illegible
// error messages, which are much better than not compiling schemas at all.
}
}
}