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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/CORBA/SimpleCommunication/communication/TreeNodeHelper.java')
-rw-r--r-- | gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/CORBA/SimpleCommunication/communication/TreeNodeHelper.java | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/CORBA/SimpleCommunication/communication/TreeNodeHelper.java b/gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/CORBA/SimpleCommunication/communication/TreeNodeHelper.java new file mode 100644 index 000000000..eac1c9a24 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/examples/gnu/classpath/examples/CORBA/SimpleCommunication/communication/TreeNodeHelper.java @@ -0,0 +1,162 @@ +/* TreeNodeHelper.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.classpath.examples.CORBA.SimpleCommunication.communication; + + +import gnu.CORBA.OrbRestricted; + +import org.omg.CORBA.Any; +import org.omg.CORBA.StructMember; +import org.omg.CORBA.TypeCode; +import org.omg.CORBA.portable.InputStream; +import org.omg.CORBA.portable.OutputStream; + +/** + * This class is used for various helper operations around the + * tree {@link} structure. + * + * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) + */ +public abstract class TreeNodeHelper +{ + /** + * The TreeNode repository id, used to identify the structure. + */ + private static String _id = + "IDL:gnu/classpath/examples/CORBA/SimpleCommunication/communication/TreeNode:1.0"; + + /** + * Caches the typecode, allowing to compute it only once. + */ + private static TypeCode typeCode; + + /** + * This is used to handle the recursive object references in + * CORBA - supported way. The tree TreeNode definition is recursive, + * as the TreeNode contains the sequence of the nodes as its field. + */ + private static boolean active; + + /** + * Extract the tree TreeNode from the unversal CORBA wrapper, Any. + */ + public static TreeNode extract(Any a) + { + return read(a.create_input_stream()); + } + + /** + * Get the TreeNode string identifer. + */ + public static String id() + { + return _id; + } + + /** + * Insert the TreeNode into the universal CORBA wrapper, Any. + */ + public static void insert(Any a, TreeNode that) + { + OutputStream out = a.create_output_stream(); + a.type(type()); + write(out, that); + a.read_value(out.create_input_stream(), type()); + } + + /** + * Read the TreeNode from the common data reprentation (CDR) stream. + */ + public static TreeNode read(InputStream istream) + { + TreeNode value = new TreeNode(); + value.name = istream.read_string(); + + int _len0 = istream.read_long(); + value.children = new TreeNode[ _len0 ]; + for (int i = 0; i < value.children.length; ++i) + value.children [ i ] = TreeNodeHelper.read(istream); + return value; + } + + /** + * Get the TreeNode type code definition. + */ + public static synchronized TypeCode type() + { + // Compute the type code only once. + if (typeCode == null) + { + synchronized (TypeCode.class) + { + if (typeCode == null) + { + // To avoid the infinite recursion loop, the + // recursive reference is handled in specific way. + if (active) + return OrbRestricted.Singleton.create_recursive_tc(_id); + active = true; + + // List all memebers of the TreeNode structure. + StructMember[] members = new StructMember[ 2 ]; + TypeCode memberType; + memberType = OrbRestricted.Singleton.create_string_tc(0); + members [ 0 ] = new StructMember("name", memberType, null); + memberType = OrbRestricted.Singleton.create_recursive_tc(""); + members [ 1 ] = new StructMember("children", memberType, null); + typeCode = + OrbRestricted.Singleton.create_struct_tc(TreeNodeHelper.id(), "TreeNode", members); + active = false; + } + } + } + return typeCode; + } + + /** + * Write the TreeNode into the common data reprentation (CDR) stream. + */ + public static void write(OutputStream ostream, TreeNode value) + { + ostream.write_string(value.name); + ostream.write_long(value.children.length); + for (int i = 0; i < value.children.length; ++i) + TreeNodeHelper.write(ostream, value.children [ i ]); + } +} |