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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/CORBA/CDR/UnknownExceptionCtxHandler.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/CORBA/CDR/UnknownExceptionCtxHandler.java | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/CORBA/CDR/UnknownExceptionCtxHandler.java b/gcc-4.4.3/libjava/classpath/gnu/CORBA/CDR/UnknownExceptionCtxHandler.java new file mode 100644 index 000000000..314dd8eb9 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/CORBA/CDR/UnknownExceptionCtxHandler.java @@ -0,0 +1,292 @@ +/* UnknownExceptionCtxHandler.java -- + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.CORBA.CDR; + +import gnu.CORBA.Minor; +import gnu.CORBA.ObjectCreator; +import gnu.CORBA.GIOP.ServiceContext; + +import org.omg.CORBA.MARSHAL; +import org.omg.CORBA.NO_IMPLEMENT; +import org.omg.CORBA.StringValueHelper; +import org.omg.CORBA.portable.OutputStream; + +import java.lang.reflect.Constructor; +import java.util.StringTokenizer; + +import javax.rmi.CORBA.Util; + +/** + * Reads the data about an unknown exception from the UnknownExceptionInfo. + * + * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) + */ +public class UnknownExceptionCtxHandler + extends Vio +{ + /** + * Encode exception and add its recored to the message service contexts. + */ + public static ServiceContext[] addExceptionContext(ServiceContext[] current, + Throwable exception, Object details) + { + try + { + ServiceContext[] c = new ServiceContext[current.length + 1]; + if (current.length > 0) + System.arraycopy(current, 0, c, 0, current.length); + + BufferedCdrOutput output = new BufferedCdrOutput(); + + if (details instanceof OutputStream) + output.setOrb(((OutputStream) output).orb()); + + if (details instanceof AbstractCdrOutput) + ((AbstractCdrOutput) details).cloneSettings(output); + + write(output, exception); + + ServiceContext xc = new ServiceContext(); + xc.context_id = ServiceContext.UnknownExceptionInfo; + xc.context_data = output.buffer.toByteArray(); + c[current.length] = xc; + return c; + } + catch (Exception ex) + { + ex.printStackTrace(); + return current; + } + } + + /** + * Write data about unknown exception. + */ + public static void write(BufferedCdrOutput output, Throwable t) + { + t.fillInStackTrace(); + output.write_Value(t); + } + + /** + * Read the data about an unknown exception from the UnknownExceptionInfo. + * Following the documentation, this must be just value type, but it seems + * that in Sun's implementation is is not, as starts from 0x0. For value type, + * this would be null. + * + * TODO Implement reading and writing in Sun format, making Classpath IIOP + * interoperable with Sun's implementation. Current inmplementation reads and + * reproduces the exception class type only. + * + * @param input the input stream to read the context (orb and other settings + * are inherited from the main stream that received the message). + * + * @param contexts all service contexts that were present in the message. + * + * @return the Throwable, extracted from context, on null, if this has failed. + */ + public static Throwable read(BufferredCdrInput input, ServiceContext[] contexts) + { + input.mark(Integer.MAX_VALUE); + + int h = input.read_long(); + if (h == 0) + { + // This block reads exception info in the Sun specific format. + // (currently we read the exception name only). + try + { + // We may need to jump back if the value is read via value + // factory. + input.mark(512); + + int value_tag = input.read_long(); + checkTag(value_tag); + + String codebase = null; + String[] ids = null; + String id = null; + + // Check for the agreed null value. + if (value_tag == vt_NULL) + return null; + else if (value_tag == vt_INDIRECTION) + return (Throwable) readIndirection(input); + else + { + // Read the value. + if ((value_tag & vf_CODEBASE) != 0) + { + // The codebase is present. The codebase is a space + // separated list of URLs from where the implementing + // code can be downloaded. + codebase = read_string(input); + } + + if ((value_tag & vf_MULTIPLE_IDS) != 0) + { + // Multiple supported repository ids are present. + ids = read_string_array(input); + } + else if ((value_tag & vf_ID) != 0) + { + // Single supported repository id is present. + id = read_string(input); + } + } + + java.lang.Object ox = createInstance(id, ids, codebase); + + return (Throwable) ox; + } + catch (Exception ex) + { + ex.printStackTrace(); + return null; + } + } + else + { + input.reset(); + // Read as defined in OMG documentation. + return (Throwable) input.read_Value(); + } + } + + /** + * Load exception by name and create the instance. The reason why this is + * different from Vio is because some exceptions have no parameterless + * constructor, but have a constructor with the string parameter instead. + */ + static Object createInstance(String id, String[] ids, String codebase) + { + Object o = _createInstance(id, codebase); + + if (ids != null) + for (int i = 0; i < ids.length && o == null; i++) + o = _createInstance(ids[i], codebase); + return o; + } + + static Object _createInstance(String id, String codebase) + { + if (id == null) + return null; + if (id.equals(StringValueHelper.id())) + return ""; + StringTokenizer st = new StringTokenizer(id, ":"); + + String prefix = st.nextToken(); + if (prefix.equalsIgnoreCase("IDL")) + return ObjectCreator.Idl2Object(id); + else if (prefix.equalsIgnoreCase("RMI")) + { + String className = st.nextToken(); + String hashCode = st.nextToken(); + String sid = null; + if (st.hasMoreElements()) + sid = st.nextToken(); + + try + { + Class objectClass = Util.loadClass(className, codebase, + Vio.class.getClassLoader()); + + String rid = ObjectCreator.getRepositoryId(objectClass); + + if (!rid.equals(id)) + { + // If direct string comparison fails, compare by meaning. + StringTokenizer st2 = new StringTokenizer(rid, ":"); + if (!st2.nextToken().equals("RMI")) + throw new InternalError("RMI format expected: '" + rid + "'"); + if (!st2.nextToken().equals(className)) + throwIt("Class name mismatch", id, rid, null); + + try + { + long h1 = Long.parseLong(hashCode, 16); + long h2 = Long.parseLong(st2.nextToken(), 16); + if (h1 != h2) + throwIt("Hashcode mismatch", id, rid, null); + + if (sid != null && st2.hasMoreTokens()) + { + long s1 = Long.parseLong(hashCode, 16); + long s2 = Long.parseLong(st2.nextToken(), 16); + if (s1 != s2) + throwIt("serialVersionUID mismatch", id, rid, null); + } + } + catch (NumberFormatException e) + { + throwIt("Invalid hashcode or svuid format: ", id, rid, e); + } + } + + // Some RemoteExceptions have no public parameterless constructor, + // but they have constructor taking string as parameter. + try + { + return objectClass.newInstance(); + } + catch (Exception ex) + { + // Try instantiate passing string as parameter. + Constructor c = objectClass.getConstructor(new Class[] { String.class }); + return c.newInstance(new Object[] { "<message unavailable>" }); + } + } + catch (MARSHAL m) + { + m.minor = Minor.Instantiation; + throw m; + } + catch (Exception ex) + { + MARSHAL m = new MARSHAL("Unable to instantiate " + id); + m.minor = Minor.Instantiation; + m.initCause(ex); + throw m; + } + } + else + throw new NO_IMPLEMENT("Unsupported prefix " + prefix + ":"); + } +} |