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/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: Mapping
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2009, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.kernel.exception;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.Properties;
import java.util.logging.Level;
import org.openmdx.kernel.loading.Resources;
import org.openmdx.kernel.log.SysLog;
/**
* Mapping
*/
class Mappers implements BasicException.Mapper {
/**
* Constructor
*/
Mappers(){
Properties configuration = new Properties();
for(URL url : Resources.getMetaInfResources(BasicException.class.getClassLoader(), "openmdx-exception-mapper.properties")) {
try (InputStream source = url.openStream()){
configuration.load(source);
} catch (IOException exception) {
SysLog.warning("Exception mapper configuration failure: " + url, exception);
}
}
for(Map.Entry entry : configuration.entrySet()) {
try {
Class exceptionClass = Class.forName(
entry.getKey().toString(),
false,
BasicException.class.getClassLoader()
);
if(Throwable.class.isAssignableFrom(exceptionClass)) {
Class mapperClass = Class.forName(
entry.getValue().toString(),
false,
BasicException.class.getClassLoader()
);
if(BasicException.Mapper.class.isAssignableFrom(mapperClass)) {
try {
registry.put(
exceptionClass,
(BasicException.Mapper)mapperClass.newInstance()
);
} catch (InstantiationException exception) {
SysLog.warning("Exception mapper instantiation failure: " + entry, exception);
} catch (IllegalAccessException exception) {
SysLog.warning("Exception mapper instantiation failure: " + entry, exception);
}
} else {
SysLog.log(
Level.WARNING,
"Mapper {1} could not be registered for {0} beacuse it does not implement {2}",
entry.getKey(), entry.getValue(), BasicException.Mapper.class.getName()
);
}
} else {
SysLog.log(
Level.WARNING,
"Mapper {1} could not be registered because {0} is not a subclass of {2}",
entry.getKey(), entry.getValue(), Throwable.class.getName()
);
}
} catch (NoClassDefFoundError error) {
SysLog.info("Exception mapper not available", entry);
} catch (ClassNotFoundException exception) {
SysLog.info("Exception mapper not available", entry);
}
}
}
/**
* Exception Mapper Registry
*/
private final Map,BasicException.Mapper> registry = new IdentityHashMap,BasicException.Mapper>();
/**
* Maps a throwable to a basic exception
*
* @param throwable
*
* @return
*/
public BasicException map(
Throwable throwable
){
try {
for(
Class current = throwable.getClass();
current != Throwable.class;
current = current.getSuperclass()
){
BasicException.Mapper mapper = registry.get(current);
if(mapper != null) {
return mapper.map(throwable);
}
}
} catch (RuntimeException ignore) {
// Failing exception mappers are just ignored
}
return null;
}
}
