| /* gnuDynUnion.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.DynAn; |
| |
| import gnu.CORBA.Unexpected; |
| |
| import org.omg.CORBA.Any; |
| import org.omg.CORBA.MARSHAL; |
| import org.omg.CORBA.ORB; |
| import org.omg.CORBA.TCKind; |
| import org.omg.CORBA.TypeCode; |
| import org.omg.CORBA.TypeCodePackage.BadKind; |
| import org.omg.CORBA.portable.InputStream; |
| import org.omg.CORBA.portable.OutputStream; |
| import org.omg.DynamicAny.DynAny; |
| import org.omg.DynamicAny.DynAnyFactoryPackage.InconsistentTypeCode; |
| import org.omg.DynamicAny.DynAnyPackage.InvalidValue; |
| import org.omg.DynamicAny.DynAnyPackage.TypeMismatch; |
| import org.omg.DynamicAny.DynUnion; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Implementation of DynUnion. |
| * |
| * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) |
| */ |
| public class gnuDynUnion |
| extends DivideableAny |
| implements DynUnion, Serializable, ValueChangeListener |
| { |
| /** |
| * Use serialVersionUID for interoperability. |
| */ |
| private static final long serialVersionUID = 1; |
| |
| /** |
| * The discrimintor of this union. |
| */ |
| DynAny discriminator; |
| |
| /** |
| * The message string that occurs several times throwing exception. |
| */ |
| static String NOAM = "No active member"; |
| |
| /** |
| * Create a new instance with the given typecode. |
| * |
| * @param aType the final_type, must be final_type of the union. |
| */ |
| public gnuDynUnion(TypeCode oType, TypeCode aType, gnuDynAnyFactory aFactory, |
| ORB anOrb |
| ) |
| throws InconsistentTypeCode |
| { |
| super(oType, aType, aFactory, anOrb); |
| try |
| { |
| discriminator = |
| factory.create_dyn_any_from_type_code(final_type.discriminator_type()); |
| |
| ((AbstractAny) discriminator).listener = this; |
| |
| if (final_type.default_index() >= 0) |
| set_to_default_member(); |
| else |
| set_to_no_active_member(); |
| } |
| catch (Exception ex) |
| { |
| InconsistentTypeCode inc = new InconsistentTypeCode("discriminator"); |
| inc.initCause(ex); |
| throw inc; |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see gnu.CORBA.DynAn.DivideableAny#to_any() |
| */ |
| public Any to_any() |
| { |
| Any a = createAny(); |
| OutputStream ou = a.create_output_stream(); |
| discriminator.to_any().write_value(ou); |
| if (array.length == 2) |
| array [ 1 ].to_any().write_value(ou); |
| a.read_value(ou.create_input_stream(), final_type); |
| return a; |
| } |
| |
| /** |
| * Assign from another identical structure. |
| */ |
| public void assign(DynAny from) |
| throws TypeMismatch |
| { |
| checkType(official_type, from.type()); |
| if (!(from instanceof DynUnion)) |
| throw new TypeMismatch("DynUnion required"); |
| else |
| { |
| try |
| { |
| DynUnion u = (DynUnion) from; |
| discriminator.assign(u.get_discriminator()); |
| if (u.has_no_active_member()) |
| { |
| if (array.length != 1) |
| array = new DynAny[] { discriminator }; |
| } |
| else |
| { |
| if (array.length != 2) |
| array = new DynAny[] { discriminator, u.member().copy() }; |
| else |
| array [ 1 ] = u.member().copy(); |
| } |
| } |
| catch (InvalidValue e) |
| { |
| throw new Unexpected(e); |
| } |
| } |
| valueChanged(); |
| } |
| |
| /** @inheritDoc */ |
| public DynAny copy() |
| { |
| try |
| { |
| gnuDynUnion other = |
| new gnuDynUnion(official_type, final_type, factory, orb); |
| other.discriminator = discriminator.copy(); |
| ((AbstractAny) other.discriminator).listener = other; |
| if (array.length == 1) |
| { |
| other.array = new DynAny[] { other.discriminator }; |
| } |
| else |
| { |
| other.array = |
| new DynAny[] { other.discriminator, array [ 1 ].copy() }; |
| } |
| return other; |
| } |
| catch (InconsistentTypeCode ex) |
| { |
| throw new Unexpected(ex); |
| } |
| } |
| |
| /** |
| * Done via reading from stream. |
| */ |
| public void from_any(Any an_any) |
| throws TypeMismatch, InvalidValue |
| { |
| checkType(official_type, an_any.type()); |
| |
| Any adis = createAny(); |
| try |
| { |
| InputStream stream = an_any.create_input_stream(); |
| adis.read_value(stream, final_type.discriminator_type()); |
| |
| DynAny nd = factory.create_dyn_any(adis); |
| |
| set_discriminator(nd); |
| if (array.length == 2) |
| { |
| // Reusing the same Any <code>adis</code>. |
| adis.read_value(stream, array [ 1 ].type()); |
| array [ 1 ].from_any(adis); |
| } |
| } |
| catch (InconsistentTypeCode it) |
| { |
| TypeMismatch t = new TypeMismatch(); |
| t.initCause(it); |
| throw t; |
| } |
| catch (MARSHAL m) |
| { |
| InvalidValue t = new InvalidValue(); |
| t.initCause(m); |
| throw t; |
| } |
| catch (BadKind b) |
| { |
| throw new Unexpected(b); |
| } |
| valueChanged(); |
| } |
| |
| /** @inheritDoc */ |
| public TCKind discriminator_kind() |
| { |
| return discriminator.type().kind(); |
| } |
| |
| /** @inheritDoc */ |
| public DynAny get_discriminator() |
| { |
| return discriminator; |
| } |
| |
| /** @inheritDoc */ |
| public boolean has_no_active_member() |
| { |
| return array.length == 1; |
| } |
| |
| /** @inheritDoc */ |
| public TCKind member_kind() |
| throws InvalidValue |
| { |
| return member().type().kind(); |
| } |
| |
| /** |
| * Get the name of the current variant of the union. |
| */ |
| public String member_name() |
| throws InvalidValue |
| { |
| if (array.length == 1) |
| throw new InvalidValue(NOAM); |
| try |
| { |
| Any da = discriminator.to_any(); |
| |
| |
| // Get the discriminator variant. |
| Variants: |
| for (int i = 0; i < final_type.member_count(); i++) |
| { |
| if (final_type.member_label(i).equal(da)) |
| return final_type.member_name(i); |
| } |
| throw new InvalidValue(NOAM); |
| } |
| catch (Exception e) |
| { |
| InvalidValue t = new InvalidValue("Err"); |
| t.initCause(e); |
| throw t; |
| } |
| } |
| |
| /** @inheritDoc */ |
| public DynAny member() |
| throws InvalidValue |
| { |
| if (array.length < 2) |
| throw new InvalidValue(NOAM); |
| else |
| return array [ 1 ]; |
| } |
| |
| /** |
| * Set the union discriminator. |
| */ |
| public void set_discriminator(DynAny aDiscriminator) |
| throws TypeMismatch |
| { |
| try |
| { |
| if (!aDiscriminator.type().equal(final_type.discriminator_type())) |
| throw new TypeMismatch("Wrong discriminator final_type for " + |
| final_type.name() |
| ); |
| |
| // Seting the same discriminator value again should not change |
| // the fields of the current member. |
| if (!discriminator.equal(aDiscriminator)) |
| { |
| discriminator.assign(aDiscriminator); |
| updateMember(); |
| } |
| else |
| { |
| pos = array.length == 2 ? 1 : 0; |
| } |
| } |
| catch (Exception e) |
| { |
| TypeMismatch t = new TypeMismatch(); |
| t.initCause(e); |
| throw t; |
| } |
| } |
| |
| /** |
| * Set to default member, if one exists. |
| */ |
| public void set_to_default_member() |
| throws TypeMismatch |
| { |
| try |
| { |
| int di = final_type.default_index(); |
| if (di < 0) |
| throw new TypeMismatch("Union " + final_type.name() + |
| "has no default index" |
| ); |
| |
| Any da = final_type.member_label(di); |
| discriminator.from_any(da); |
| updateMember(); |
| } |
| catch (TypeMismatch m) |
| { |
| // This one OK. |
| throw m; |
| } |
| catch (Exception e) |
| { |
| TypeMismatch t = new TypeMismatch(); |
| t.initCause(e); |
| throw t; |
| } |
| } |
| |
| /** @inheritDoc */ |
| public void set_to_no_active_member() |
| throws TypeMismatch |
| { |
| try |
| { |
| if (final_type.default_index() >= 0) |
| { |
| throw new TypeMismatch("Explicit default case defined."); |
| } |
| } |
| catch (BadKind ex) |
| { |
| // The default index is not set. |
| } |
| array = new DynAny[] { discriminator }; |
| valueChanged(); |
| } |
| |
| /** |
| * Update member, in accordance with discriminator value. |
| */ |
| public void updateMember() |
| throws TypeMismatch |
| { |
| try |
| { |
| Any da = discriminator.to_any(); |
| |
| |
| // Get the discriminator variant. |
| Variants: |
| for (int i = 0; i < final_type.member_count(); i++) |
| { |
| if (final_type.member_label(i).equal(da)) |
| { |
| array = |
| new DynAny[] |
| { |
| discriminator, |
| factory.create_dyn_any_from_type_code(final_type.member_type(i)) |
| }; |
| pos = 1; |
| valueChanged(); |
| return; |
| } |
| } |
| } |
| catch (Exception e) |
| { |
| TypeMismatch t = new TypeMismatch(); |
| t.initCause(e); |
| throw t; |
| } |
| |
| // Discrimintator does not point to valid member. |
| array = new DynAny[] { discriminator }; |
| pos = 0; |
| valueChanged(); |
| } |
| |
| /** |
| * Called when the discriminator is changed. |
| */ |
| public void changed() |
| { |
| try |
| { |
| updateMember(); |
| } |
| catch (TypeMismatch ex) |
| { |
| throw new Unexpected(ex); |
| } |
| } |
| } |