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+/* gnuRuntime.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.java.lang.CPStringBuilder;
+
+import org.omg.CORBA.LocalObject;
+import org.omg.CORBA.MARSHAL;
+
+import java.io.Serializable;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.IdentityHashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.TreeSet;
+
+/**
+ * Our implementation of the sending context runtime.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public class gnuRuntime
+ extends LocalObject
+ implements org.omg.SendingContext.RunTime
+{
+ /**
+ * The data entry about the object that was written.
+ */
+ static class Entry
+ {
+ /**
+ * The stream position, where the object was written.
+ */
+ int at;
+
+ /**
+ * The object that was written.
+ */
+ Object object;
+
+ public String toString()
+ {
+ return object + "[" + at + "] "+object.getClass().getName();
+ }
+ }
+
+ /**
+ * The instruction that the actual object is stored at different location.
+ * Used when processing chunked data where positions shifts due removing the
+ * chunking tags.
+ */
+ static class Redirection
+ extends Entry
+ {
+ public String toString()
+ {
+ return "->" + at;
+ }
+ }
+
+ /**
+ * Use serialVersionUID for interoperability.
+ */
+ private static final long serialVersionUID = 1;
+
+ /**
+ * The history of the written objects, maps object to records. The different
+ * objects must be treated as different regardless that .equals returns.
+ */
+ private Map sh_objects = new IdentityHashMap();
+
+ /**
+ * The written repository Ids that can be shared.
+ */
+ private Map sh_ids = new TreeMap(new Comparator()
+ {
+ public int compare(Object a, Object b)
+ {
+ if (a instanceof String && b instanceof String)
+ // Comparing string with string.
+ return ((String) a).compareTo((String) b);
+ else if (a instanceof String[] && b instanceof String[])
+ {
+ // Comparing array with array.
+ String[] sa = (String[]) a;
+ String[] sb = (String[]) b;
+
+ if (sa.length != sb.length)
+ return sa.length - sb.length;
+ else
+ {
+ int c;
+ for (int i = 0; i < sa.length; i++)
+ {
+ c = sa[i].compareTo(sb[i]);
+ if (c != 0)
+ return c;
+ }
+ return 0;
+ }
+ }
+ else
+ // Comparing string with array.
+ return a instanceof String ? 1 : -1;
+ }
+ });
+
+ /**
+ * The history of the written objects, maps positions to records. The
+ * different objects must be treated as different regardless that .equals
+ * returns.
+ */
+ private Map positions = new HashMap();
+
+ /**
+ * The Codebase.
+ */
+ private String codebase;
+
+ /**
+ * The pre-created instance of the object being written (avoid
+ * re-instantiation).
+ */
+ public Serializable target;
+
+ /**
+ * Create Runtime.
+ *
+ * @param a_id a repository Id, if only one Id was specified in the stream.
+ * @param a_ids a repository Ids, if the multiple Ids were specified in te
+ * stream.
+ * @param a_codebase a codebase, if it was specified in the stream.
+ */
+ public gnuRuntime(String a_codebase, Object a_target)
+ {
+ if (a_target instanceof Serializable)
+ target = (Serializable) a_target;
+
+ codebase = a_codebase;
+ }
+
+ /**
+ * Mark the given object as written at the given position.
+ */
+ public void objectWritten(Object object, int at)
+ {
+ if (object == null || at < 0)
+ return; // No positional information provided.
+ if (sh_objects.containsKey(object))
+ throw new AssertionError("Repetetive writing of the same object "
+ + object + " at " + at + dump());
+
+ Entry e = new Entry();
+ e.at = at;
+ e.object = object;
+
+ sh_objects.put(object, e);
+ positions.put(new Integer(at), e);
+ }
+
+ /**
+ * Check if the object is already written.
+ *
+ * @return the position, at that the object is allready written or -1 if it is
+ * not yet written.
+ */
+ public int isWrittenAt(Object x)
+ {
+ Entry e = (Entry) sh_objects.get(x);
+ return e == null ? -1 : e.at;
+ }
+
+ /**
+ * Set redirection, indicating that the object, searched at the p_searched
+ * position can be actually found at the p_present position.
+ */
+ public void redirect(int p_searched, int p_present)
+ {
+ Redirection redirection = new Redirection();
+ redirection.at = p_present;
+ positions.put(new Integer(p_searched), redirection);
+ }
+
+ /**
+ * Get the object, written at the given position. This returs both shared
+ * objects and repository Ids.
+ *
+ * @return the position, at that the object is allready written.
+ *
+ * @throws MARSHAL if there is no object written at that position.
+ */
+ public Object isObjectWrittenAt(int x, int offset)
+ {
+ Entry e = (Entry) positions.get(new Integer(x));
+ if (e instanceof Redirection)
+ return isObjectWrittenAt(e.at, offset);
+ else if (e != null)
+ return e.object;
+ else
+ {
+ MARSHAL m = new MARSHAL("No object was written at " + x +
+ " (offset " + offset + ") r " + this + dump());
+ m.minor = Minor.Graph;
+ throw m;
+ }
+ }
+
+ /**
+ * Mark the given object as written at the given position.
+ */
+ public void singleIdWritten(String id, int at)
+ {
+ if (sh_ids.containsKey(id))
+ throw new InternalError("Repetetive writing of the same string " +
+ id + dump());
+
+ Entry e = new Entry();
+ e.at = at;
+ e.object = id;
+
+ sh_ids.put(id, e);
+ positions.put(new Integer(at), e);
+ }
+
+ /**
+ * Mark the given object as written at the given position.
+ */
+ public void multipleIdsWritten(String[] ids, int at)
+ {
+ if (sh_ids.containsKey(ids))
+ throw new InternalError("Repetetive writing of the same string " +
+ ids + dump());
+
+ Entry e = new Entry();
+ e.at = at;
+ e.object = ids;
+
+ sh_ids.put(ids, e);
+ positions.put(new Integer(at), e);
+ }
+
+ /**
+ * Check if the object is already written.
+ *
+ * @return the position, at that the object is allready written or -1 if it is
+ * not yet written.
+ */
+ public int idWrittenAt(Object x)
+ {
+ Entry e = (Entry) sh_ids.get(x);
+ return e == null ? -1 : e.at;
+ }
+
+ /**
+ * Get the codebase.
+ */
+ public String getCodeBase()
+ {
+ return codebase;
+ }
+
+ /**
+ * Set the codebase, preserving the old value if the passed parameter is null
+ * and forming the space delimited list if both new and old values are not
+ * null.
+ */
+ public void addCodeBase(String base)
+ {
+ if (base != null)
+ {
+ if (codebase == null)
+ codebase = base;
+ else
+ codebase = codebase + " " + base;
+ }
+ }
+
+ /**
+ * Dump all objects that are currently stored.
+ */
+ public String dump()
+ {
+ CPStringBuilder b = new CPStringBuilder(" Stream content: \n");
+
+ // Sort by position.
+ TreeSet t = new TreeSet(positions.keySet());
+ Iterator p = t.iterator();
+
+ while (p.hasNext())
+ {
+ Object k = p.next();
+ b.append(" " + k + ": " + ((Entry) positions.get(k)).toString()
+ + "\n");
+ }
+ return b.toString();
+ }
+
+}