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173 lines (155 loc) · 6.68 KB
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/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (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.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2005 David Corbin <dcorbin@users.sourceforge.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;
import java.io.PrintStream;
import java.lang.reflect.Member;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.javasupport.Java;
import org.jruby.runtime.Block;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.builtin.IRubyObject;
@JRubyClass(name = "NativeException", parent = "RuntimeError")
public class NativeException extends RubyException {
private final Throwable cause;
public static final String CLASS_NAME = "NativeException";
private final Ruby runtime;
public NativeException(Ruby runtime, RubyClass rubyClass, Throwable cause) {
super(runtime, rubyClass);
this.runtime = runtime;
this.cause = cause;
this.message = runtime.newString(cause.getClass().getName() + ": " + searchStackMessage(cause));
}
private NativeException(Ruby runtime, RubyClass rubyClass) {
super(runtime, rubyClass);
this.runtime = runtime;
this.cause = new Throwable();
this.message = runtime.newString();
}
private static ObjectAllocator NATIVE_EXCEPTION_ALLOCATOR = new ObjectAllocator() {
public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
NativeException instance = new NativeException(runtime, klazz);
instance.setMetaClass(klazz);
return instance;
}
};
public static RubyClass createClass(Ruby runtime, RubyClass baseClass) {
RubyClass exceptionClass = runtime.defineClass(CLASS_NAME, baseClass, NATIVE_EXCEPTION_ALLOCATOR);
exceptionClass.defineAnnotatedMethods(NativeException.class);
return exceptionClass;
}
@JRubyMethod
public IRubyObject cause(Block unusedBlock) {
return Java.getInstance(getRuntime(), cause);
}
public IRubyObject backtrace() {
IRubyObject rubyTrace = super.backtrace();
if (rubyTrace.isNil()) {
return rubyTrace;
}
RubyArray array = (RubyArray) rubyTrace.dup();
StackTraceElement[] stackTrace = cause.getStackTrace();
for (int i = stackTrace.length - 1; i >= 0; i--) {
StackTraceElement element = stackTrace[i];
String className = element.getClassName();
String line = null;
if (element.getFileName() == null) {
line = className + ":" + element.getLineNumber() + ":in `" + element.getMethodName() + "'";
} else {
int index = className.lastIndexOf(".");
String packageName = null;
if (index == -1) {
packageName = "";
} else {
packageName = className.substring(0, index) + "/";
}
line = packageName.replace(".", "/") + element.getFileName() + ":" + element.getLineNumber() + ":in `" + element.getMethodName() + "'";
}
RubyString string = runtime.newString(line);
array.unshift(string);
}
return array;
}
public void trimStackTrace(Member target) {
Throwable t = new Throwable();
StackTraceElement[] origStackTrace = cause.getStackTrace();
StackTraceElement[] currentStackTrace = t.getStackTrace();
int skip = 0;
for (int i = 1;
i <= origStackTrace.length && i <= currentStackTrace.length;
++i) {
StackTraceElement a = origStackTrace[origStackTrace.length - i];
StackTraceElement b = currentStackTrace[currentStackTrace.length - i];
if (a.equals(b)) {
skip += 1;
} else {
break;
}
}
// If we know what method was being called, strip everything
// before the call. This hides the JRuby and reflection internals.
if (target != null) {
String className = target.getDeclaringClass().getName();
String methodName = target.getName();
for (int i = origStackTrace.length - skip - 1; i >= 0; --i) {
StackTraceElement frame = origStackTrace[i];
if (frame.getClassName().equals(className) &&
frame.getMethodName().equals(methodName)) {
skip = origStackTrace.length - i - 1;
break;
}
}
}
if (skip > 0) {
StackTraceElement[] newStackTrace =
new StackTraceElement[origStackTrace.length - skip];
for (int i = 0; i < newStackTrace.length; ++i) {
newStackTrace[i] = origStackTrace[i];
}
cause.setStackTrace(newStackTrace);
}
}
public void printBacktrace(PrintStream errorStream) {
super.printBacktrace(errorStream);
if (getRuntime().getDebug().isTrue()) {
errorStream.println("Complete Java stackTrace");
cause.printStackTrace(errorStream);
}
}
public Throwable getCause() {
return cause;
}
private String searchStackMessage(Throwable cause) {
String message = null;
do {
message = cause.getMessage();
cause = cause.getCause();
} while (message == null && cause != null);
return message;
}
}