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org.apache.cxf.interceptor.ClientFaultConverter Maven / Gradle / Ivy
/**
* 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.cxf.interceptor;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Pattern;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.xpath.XPathConstants;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.databinding.DataBinding;
import org.apache.cxf.databinding.DataReader;
import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.helpers.XPathUtils;
import org.apache.cxf.message.FaultMode;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageUtils;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.apache.cxf.service.Service;
import org.apache.cxf.service.model.BindingOperationInfo;
import org.apache.cxf.service.model.FaultInfo;
import org.apache.cxf.service.model.MessagePartInfo;
import org.apache.cxf.staxutils.W3CDOMStreamReader;
/**
* Takes a Fault and converts it to a local exception type if possible.
*/
public class ClientFaultConverter extends AbstractPhaseInterceptor {
public static final String DISABLE_FAULT_MAPPING = "disable-fault-mapping";
public static final Pattern CAUSE_SUFFIX_SPLITTER
= Pattern.compile(Message.EXCEPTION_CAUSE_SUFFIX, Pattern.LITERAL | Pattern.MULTILINE);
private static final Logger LOG = LogUtils.getLogger(ClientFaultConverter.class);
public ClientFaultConverter() {
super(Phase.UNMARSHAL);
}
public ClientFaultConverter(String phase) {
super(phase);
}
public void handleMessage(Message msg) {
Fault fault = (Fault) msg.getContent(Exception.class);
if (fault.getDetail() != null
&& !MessageUtils.getContextualBoolean(msg,
DISABLE_FAULT_MAPPING,
false)) {
processFaultDetail(fault, msg);
setStackTrace(fault, msg);
}
FaultMode faultMode = FaultMode.UNCHECKED_APPLICATION_FAULT;
// Check if the raised exception is declared in the WSDL or by the JAX-RS resource
Method m = msg.getExchange().get(Method.class);
if (m != null) {
Exception e = msg.getContent(Exception.class);
for (Class cl : m.getExceptionTypes()) {
if (cl.isInstance(e)) {
faultMode = FaultMode.CHECKED_APPLICATION_FAULT;
break;
}
}
}
msg.getExchange().put(FaultMode.class, faultMode);
}
protected void processFaultDetail(Fault fault, Message msg) {
Element exDetail = (Element) DOMUtils.getChild(fault.getDetail(), Node.ELEMENT_NODE);
if (exDetail == null) {
return;
}
QName qname = new QName(exDetail.getNamespaceURI(), exDetail.getLocalName());
FaultInfo faultWanted = null;
MessagePartInfo part = null;
BindingOperationInfo boi = msg.getExchange().get(BindingOperationInfo.class);
if (boi == null) {
return;
}
if (boi.isUnwrapped()) {
boi = boi.getWrappedOperation();
}
for (FaultInfo faultInfo : boi.getOperationInfo().getFaults()) {
for (MessagePartInfo mpi : faultInfo.getMessageParts()) {
if (qname.equals(mpi.getConcreteName())) {
faultWanted = faultInfo;
part = mpi;
break;
}
}
if (faultWanted != null) {
break;
}
}
if (faultWanted == null) {
//did not find it using the proper qualified names, we'll try again with just the localpart
for (FaultInfo faultInfo : boi.getOperationInfo().getFaults()) {
for (MessagePartInfo mpi : faultInfo.getMessageParts()) {
if (qname.getLocalPart().equals(mpi.getConcreteName().getLocalPart())) {
faultWanted = faultInfo;
part = mpi;
break;
}
}
if (faultWanted != null) {
break;
}
}
}
if (faultWanted == null) {
return;
}
Service s = msg.getExchange().get(Service.class);
DataBinding dataBinding = s.getDataBinding();
Object e = null;
if (isDOMSupported(dataBinding)) {
DataReader reader = dataBinding.createReader(Node.class);
reader.setProperty(DataReader.FAULT, fault);
e = reader.read(part, exDetail);
} else {
DataReader reader = dataBinding.createReader(XMLStreamReader.class);
XMLStreamReader xsr = new W3CDOMStreamReader(exDetail);
try {
xsr.nextTag();
} catch (XMLStreamException e1) {
throw new Fault(e1);
}
reader.setProperty(DataReader.FAULT, fault);
e = reader.read(part, xsr);
}
if (!(e instanceof Exception)) {
try {
Class exClass = faultWanted.getProperty(Class.class.getName(), Class.class);
if (exClass == null) {
return;
}
if (e == null) {
Constructor constructor = exClass.getConstructor(new Class[]{String.class});
e = constructor.newInstance(new Object[]{fault.getMessage()});
} else {
try {
Constructor constructor = getConstructor(exClass, e);
e = constructor.newInstance(new Object[]{fault.getMessage(), e});
} catch (NoSuchMethodException e1) {
//Use reflection to convert fault bean to exception
e = convertFaultBean(exClass, e, fault);
}
}
msg.setContent(Exception.class, e);
} catch (Exception e1) {
LogUtils.log(LOG, Level.INFO, "EXCEPTION_WHILE_CREATING_EXCEPTION", e1, e1.getMessage());
}
} else {
if (fault.getMessage() != null) {
Field f;
try {
f = Throwable.class.getDeclaredField("detailMessage");
f.setAccessible(true);
f.set(e, fault.getMessage());
} catch (Exception e1) {
//ignore
}
}
msg.setContent(Exception.class, e);
}
}
private Constructor getConstructor(Class faultClass, Object e) throws NoSuchMethodException {
Class beanClass = e.getClass();
Constructor cons[] = faultClass.getConstructors();
for (Constructor c : cons) {
if (c.getParameterTypes().length == 2
&& String.class.equals(c.getParameterTypes()[0])
&& c.getParameterTypes()[1].isInstance(e)) {
return c;
}
}
try {
return faultClass.getConstructor(new Class[]{String.class, beanClass});
} catch (NoSuchMethodException ex) {
Class cls = getPrimitiveClass(beanClass);
if (cls != null) {
return faultClass.getConstructor(new Class[]{String.class, cls});
} else {
throw ex;
}
}
}
private boolean isDOMSupported(DataBinding db) {
boolean supportsDOM = false;
for (Class c : db.getSupportedReaderFormats()) {
if (c.equals(Node.class)) {
supportsDOM = true;
}
}
return supportsDOM;
}
private void setStackTrace(Fault fault, Message msg) {
Throwable cause = null;
Map ns = new HashMap();
XPathUtils xu = new XPathUtils(ns);
ns.put("s", Fault.STACKTRACE_NAMESPACE);
String ss = (String) xu.getValue("//s:" + Fault.STACKTRACE + "/text()", fault.getDetail(),
XPathConstants.STRING);
List stackTraceList = new ArrayList();
if (!StringUtils.isEmpty(ss)) {
Iterator linesIterator = Arrays.asList(CAUSE_SUFFIX_SPLITTER.split(ss)).iterator();
while (linesIterator.hasNext()) {
String oneLine = linesIterator.next();
if (oneLine.startsWith("Caused by:")) {
cause = getCause(linesIterator, oneLine);
break;
}
stackTraceList.add(parseStackTrackLine(oneLine));
}
if (stackTraceList.size() > 0 || cause != null) {
Exception e = msg.getContent(Exception.class);
if (!stackTraceList.isEmpty()) {
StackTraceElement[] stackTraceElement = new StackTraceElement[stackTraceList.size()];
e.setStackTrace(stackTraceList.toArray(stackTraceElement));
}
if (cause != null) {
e.initCause(cause);
}
}
}
}
// recursively parse the causes and instantiate corresponding throwables
private Throwable getCause(Iterator linesIterator, String firstLine) {
// The actual exception class of the cause might be unavailable at the
// client -> use a standard throwable to represent the cause.
Throwable res = new Throwable(firstLine.substring(firstLine.indexOf(":") + 2));
List stackTraceList = new ArrayList();
while (linesIterator.hasNext()) {
String oneLine = linesIterator.next();
if (oneLine.startsWith("Caused by:")) {
Throwable nestedCause = getCause(linesIterator, oneLine);
res.initCause(nestedCause);
break;
}
stackTraceList.add(parseStackTrackLine(oneLine));
}
StackTraceElement[] stackTraceElement = new StackTraceElement[stackTraceList.size()];
res.setStackTrace(stackTraceList.toArray(stackTraceElement));
return res;
}
private static StackTraceElement parseStackTrackLine(String oneLine) {
StringTokenizer stInner = new StringTokenizer(oneLine, "!");
return new StackTraceElement(stInner.nextToken(), stInner.nextToken(),
stInner.nextToken(), Integer.parseInt(stInner.nextToken()));
}
private Class getPrimitiveClass(Class cls) {
if (cls.isPrimitive()) {
return cls;
}
try {
Field field = cls.getField("TYPE");
Object obj = cls;
Object type = field.get(obj);
if (type instanceof Class) {
return (Class)type;
}
} catch (Exception e) {
// do nothing
}
return null;
}
private Exception convertFaultBean(Class exClass, Object faultBean, Fault fault) throws Exception {
Constructor constructor = exClass.getConstructor(new Class[]{String.class});
Exception e = (Exception)constructor.newInstance(new Object[]{fault.getMessage()});
//Copy fault bean fields to exception
for (Class obj = exClass; !obj.equals(Object.class); obj = obj.getSuperclass()) {
Field[] fields = obj.getDeclaredFields();
for (Field f : fields) {
try {
Field beanField = faultBean.getClass().getDeclaredField(f.getName());
beanField.setAccessible(true);
f.setAccessible(true);
f.set(e, beanField.get(faultBean));
} catch (NoSuchFieldException e1) {
//do nothing
}
}
}
//also use/try public getter/setter methods
Method meth[] = faultBean.getClass().getMethods();
for (Method m : meth) {
if (m.getParameterTypes().length == 0
&& (m.getName().startsWith("get")
|| m.getName().startsWith("is"))) {
try {
String name;
if (m.getName().startsWith("get")) {
name = "set" + m.getName().substring(3);
} else {
name = "set" + m.getName().substring(2);
}
Method m2 = exClass.getMethod(name, m.getReturnType());
m2.invoke(e, m.invoke(faultBean));
} catch (Exception e1) {
//ignore
}
}
}
return e;
}
}
