| /* |
| * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.corba.se.impl.dynamicany; |
| |
| import org.omg.CORBA.TypeCode; |
| import org.omg.CORBA.TCKind; |
| import org.omg.CORBA.Any; |
| import org.omg.CORBA.TypeCodePackage.BadKind; |
| import org.omg.CORBA.TypeCodePackage.Bounds; |
| import org.omg.CORBA.portable.InputStream; |
| import org.omg.DynamicAny.*; |
| import org.omg.DynamicAny.DynAnyPackage.TypeMismatch; |
| import org.omg.DynamicAny.DynAnyPackage.InvalidValue; |
| import org.omg.DynamicAny.DynAnyFactoryPackage.InconsistentTypeCode; |
| |
| import com.sun.corba.se.spi.orb.ORB ; |
| import com.sun.corba.se.spi.logging.CORBALogDomains ; |
| import com.sun.corba.se.impl.logging.ORBUtilSystemException ; |
| |
| public class DynUnionImpl extends DynAnyConstructedImpl implements DynUnion |
| { |
| // |
| // Instance variables |
| // |
| |
| DynAny discriminator = null; |
| // index either points to the discriminator or the named member is it exists. |
| // The currently active member, which is of the same type as the discriminator. |
| DynAny currentMember = null; |
| int currentMemberIndex = NO_INDEX; |
| |
| // |
| // Constructors |
| // |
| |
| private DynUnionImpl() { |
| this(null, (Any)null, false); |
| } |
| |
| protected DynUnionImpl(ORB orb, Any any, boolean copyValue) { |
| // We can be sure that typeCode is of kind tk_union |
| super(orb, any, copyValue); |
| } |
| |
| protected DynUnionImpl(ORB orb, TypeCode typeCode) { |
| // We can be sure that typeCode is of kind tk_union |
| super(orb, typeCode); |
| } |
| |
| protected boolean initializeComponentsFromAny() { |
| try { |
| InputStream input = any.create_input_stream(); |
| Any discriminatorAny = DynAnyUtil.extractAnyFromStream(discriminatorType(), input, orb); |
| discriminator = DynAnyUtil.createMostDerivedDynAny(discriminatorAny, orb, false); |
| currentMemberIndex = currentUnionMemberIndex(discriminatorAny); |
| Any memberAny = DynAnyUtil.extractAnyFromStream(memberType(currentMemberIndex), input, orb); |
| currentMember = DynAnyUtil.createMostDerivedDynAny(memberAny, orb, false); |
| components = new DynAny[] {discriminator, currentMember}; |
| } catch (InconsistentTypeCode ictc) { // impossible |
| } |
| return true; |
| } |
| |
| // Sets the current position to zero. |
| // The discriminator value is set to a value consistent with the first named member |
| // of the union. That member is activated and (recursively) initialized to its default value. |
| protected boolean initializeComponentsFromTypeCode() { |
| //System.out.println(this + " initializeComponentsFromTypeCode"); |
| try { |
| // We can be sure that memberCount() > 0 according to the IDL language spec |
| discriminator = DynAnyUtil.createMostDerivedDynAny(memberLabel(0), orb, false); |
| index = 0; |
| currentMemberIndex = 0; |
| currentMember = DynAnyUtil.createMostDerivedDynAny(memberType(0), orb); |
| components = new DynAny[] {discriminator, currentMember}; |
| } catch (InconsistentTypeCode ictc) { // impossible |
| } |
| return true; |
| } |
| |
| // |
| // Convenience methods |
| // |
| |
| private TypeCode discriminatorType() { |
| TypeCode discriminatorType = null; |
| try { |
| discriminatorType = any.type().discriminator_type(); |
| } catch (BadKind bad) { |
| } |
| return discriminatorType; |
| } |
| |
| private int memberCount() { |
| int memberCount = 0; |
| try { |
| memberCount = any.type().member_count(); |
| } catch (BadKind bad) { |
| } |
| return memberCount; |
| } |
| |
| private Any memberLabel(int i) { |
| Any memberLabel = null; |
| try { |
| memberLabel = any.type().member_label(i); |
| } catch (BadKind bad) { |
| } catch (Bounds bounds) { |
| } |
| return memberLabel; |
| } |
| |
| private TypeCode memberType(int i) { |
| TypeCode memberType = null; |
| try { |
| memberType = any.type().member_type(i); |
| } catch (BadKind bad) { |
| } catch (Bounds bounds) { |
| } |
| return memberType; |
| } |
| |
| private String memberName(int i) { |
| String memberName = null; |
| try { |
| memberName = any.type().member_name(i); |
| } catch (BadKind bad) { |
| } catch (Bounds bounds) { |
| } |
| return memberName; |
| } |
| |
| private int defaultIndex() { |
| int defaultIndex = -1; |
| try { |
| defaultIndex = any.type().default_index(); |
| } catch (BadKind bad) { |
| } |
| return defaultIndex; |
| } |
| |
| private int currentUnionMemberIndex(Any discriminatorValue) { |
| int memberCount = memberCount(); |
| Any memberLabel; |
| for (int i=0; i<memberCount; i++) { |
| memberLabel = memberLabel(i); |
| if (memberLabel.equal(discriminatorValue)) { |
| return i; |
| } |
| } |
| if (defaultIndex() != -1) { |
| return defaultIndex(); |
| } |
| return NO_INDEX; |
| } |
| |
| protected void clearData() { |
| super.clearData(); |
| discriminator = null; |
| // Necessary to guarantee OBJECT_NOT_EXIST in member() |
| currentMember.destroy(); |
| currentMember = null; |
| currentMemberIndex = NO_INDEX; |
| } |
| |
| // |
| // DynAny interface methods |
| // |
| |
| // _REVISIT_ More efficient copy operation |
| |
| // |
| // DynUnion interface methods |
| // |
| |
| /** |
| * Returns the current discriminator value. |
| */ |
| public org.omg.DynamicAny.DynAny get_discriminator () { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| return (checkInitComponents() ? discriminator : null); |
| } |
| |
| // Sets the discriminator of the DynUnion to the specified value. |
| // If the TypeCode of the parameter is not equivalent |
| // to the TypeCode of the unions discriminator, the operation raises TypeMismatch. |
| // |
| // Setting the discriminator to a value that is consistent with the currently |
| // active union member does not affect the currently active member. |
| // Setting the discriminator to a value that is inconsistent with the currently |
| // active member deactivates the member and activates the member that is consistent |
| // with the new discriminator value (if there is a member for that value) |
| // by initializing the member to its default value. |
| // |
| // If the discriminator value indicates a non-existent union member |
| // this operation sets the current position to 0 |
| // (has_no_active_member returns true in this case). |
| // Otherwise the current position is set to 1 (has_no_active_member returns false and |
| // component_count returns 2 in this case). |
| public void set_discriminator (org.omg.DynamicAny.DynAny newDiscriminator) |
| throws org.omg.DynamicAny.DynAnyPackage.TypeMismatch |
| { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| if ( ! newDiscriminator.type().equal(discriminatorType())) { |
| throw new TypeMismatch(); |
| } |
| newDiscriminator = DynAnyUtil.convertToNative(newDiscriminator, orb); |
| Any newDiscriminatorAny = getAny(newDiscriminator); |
| int newCurrentMemberIndex = currentUnionMemberIndex(newDiscriminatorAny); |
| if (newCurrentMemberIndex == NO_INDEX) { |
| clearData(); |
| index = 0; |
| } else { |
| // _REVISIT_ Could possibly optimize here if we don't need to initialize components |
| checkInitComponents(); |
| if (currentMemberIndex == NO_INDEX || newCurrentMemberIndex != currentMemberIndex) { |
| clearData(); |
| index = 1; |
| currentMemberIndex = newCurrentMemberIndex; |
| try { |
| currentMember = DynAnyUtil.createMostDerivedDynAny(memberType(currentMemberIndex), orb); |
| } catch (InconsistentTypeCode ictc) {} |
| discriminator = newDiscriminator; |
| components = new DynAny[] { discriminator, currentMember }; |
| representations = REPRESENTATION_COMPONENTS; |
| } |
| } |
| } |
| |
| // Sets the discriminator to a value that is consistent with the value |
| // of the default case of a union; it sets the current position to |
| // zero and causes component_count to return 2. |
| // Calling set_to_default_member on a union that does not have an explicit |
| // default case raises TypeMismatch. |
| public void set_to_default_member () |
| throws org.omg.DynamicAny.DynAnyPackage.TypeMismatch |
| { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| int defaultIndex = defaultIndex(); |
| if (defaultIndex == -1) { |
| throw new TypeMismatch(); |
| } |
| try { |
| clearData(); |
| index = 1; |
| currentMemberIndex = defaultIndex; |
| currentMember = DynAnyUtil.createMostDerivedDynAny(memberType(defaultIndex), orb); |
| components = new DynAny[] {discriminator, currentMember}; |
| Any discriminatorAny = orb.create_any(); |
| discriminatorAny.insert_octet((byte)0); |
| discriminator = DynAnyUtil.createMostDerivedDynAny(discriminatorAny, orb, false); |
| representations = REPRESENTATION_COMPONENTS; |
| } catch (InconsistentTypeCode ictc) {} |
| } |
| |
| // Sets the discriminator to a value that does not correspond |
| // to any of the unions case labels. |
| // It sets the current position to zero and causes component_count to return 1. |
| // Calling set_to_no_active_member on a union that has an explicit default case |
| // or on a union that uses the entire range of discriminator values |
| // for explicit case labels raises TypeMismatch. |
| public void set_to_no_active_member () |
| throws org.omg.DynamicAny.DynAnyPackage.TypeMismatch |
| { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| // _REVISIT_ How does one check for "entire range of discriminator values"? |
| if (defaultIndex() != -1) { |
| throw new TypeMismatch(); |
| } |
| checkInitComponents(); |
| Any discriminatorAny = getAny(discriminator); |
| // erase the discriminators value so that it does not correspond |
| // to any of the unions case labels |
| discriminatorAny.type(discriminatorAny.type()); |
| index = 0; |
| currentMemberIndex = NO_INDEX; |
| // Necessary to guarantee OBJECT_NOT_EXIST in member() |
| currentMember.destroy(); |
| currentMember = null; |
| components[0] = discriminator; |
| representations = REPRESENTATION_COMPONENTS; |
| } |
| |
| // Returns true if the union has no active member |
| // (that is, the unions value consists solely of its discriminator because the |
| // discriminator has a value that is not listed as an explicit case label). |
| // Calling this operation on a union that has a default case returns false. |
| // Calling this operation on a union that uses the entire range of discriminator |
| // values for explicit case labels returns false. |
| public boolean has_no_active_member () { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| // _REVISIT_ How does one check for "entire range of discriminator values"? |
| if (defaultIndex() != -1) { |
| return false; |
| } |
| checkInitComponents(); |
| return (checkInitComponents() ? (currentMemberIndex == NO_INDEX) : false); |
| } |
| |
| public org.omg.CORBA.TCKind discriminator_kind () { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| return discriminatorType().kind(); |
| } |
| |
| // Returns the currently active member. |
| // If the union has no active member, the operation raises InvalidValue. |
| // Note that the returned reference remains valid only for as long |
| // as the currently active member does not change. |
| // Using the returned reference beyond the life time |
| // of the currently active member raises OBJECT_NOT_EXIST. |
| public org.omg.DynamicAny.DynAny member () |
| throws org.omg.DynamicAny.DynAnyPackage.InvalidValue |
| { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| if ( ! checkInitComponents() || currentMemberIndex == NO_INDEX) |
| throw new InvalidValue(); |
| return currentMember; |
| } |
| |
| // Returns the name of the currently active member. |
| // If the unions TypeCode does not contain a member name for the currently active member, |
| // the operation returns an empty string. |
| // Calling member_name on a union without an active member raises InvalidValue. |
| public String member_name () |
| throws org.omg.DynamicAny.DynAnyPackage.InvalidValue |
| { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| if ( ! checkInitComponents() || currentMemberIndex == NO_INDEX) |
| throw new InvalidValue(); |
| String memberName = memberName(currentMemberIndex); |
| return (memberName == null ? "" : memberName); |
| } |
| |
| // Returns the TCKind value of the TypeCode of the currently active member. |
| // If the union has no active member, the operation raises InvalidValue. |
| public org.omg.CORBA.TCKind member_kind () |
| throws org.omg.DynamicAny.DynAnyPackage.InvalidValue |
| { |
| if (status == STATUS_DESTROYED) { |
| throw wrapper.dynAnyDestroyed() ; |
| } |
| if ( ! checkInitComponents() || currentMemberIndex == NO_INDEX) |
| throw new InvalidValue(); |
| return memberType(currentMemberIndex).kind(); |
| } |
| } |
