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21 package org.jacorb.collection;
22
23 import org.omg.CosCollection.OperationsOperations;
24 import org.omg.CORBA.Any  ;
25 import org.jacorb.collection.util.*;
26
27 class SortedRelationComparator implements ObjectComparator {
28 private OperationsOperations ops;
29 private Any current = null;
30 private Any current_key = null;
31
32 SortedRelationComparator( OperationsOperations ops ) {
33 this.ops = ops;
34 }
35
36 public synchronized int compare( Object obj1, Object obj2 ) throws ObjectInvalid {
37 if( obj1 == null || obj2 == null ){
38 throw new ObjectInvalid();
39 }
40 check_object( obj1 );
41 check_object( obj2 );
42 Any key1 = ops.key( (Any )obj1 );
43 Any key2 = ops.key( (Any )obj2 );
44 int result = ops.key_compare( key1, key2 );
45 if( result == 0 ){
46 result = ops.compare( (Any )obj1, (Any )obj2 );
47 }
48 return result;
49 }
50
51 public synchronized void element( Object obj ) throws ObjectInvalid {
52 check_object( obj );
53 current = (Any ) obj;
54 if( current != null ){
55 current_key = ops.key( current );
56 } else {
57 current_key = null;
58 }
59 }
60
61 public synchronized Object element() {
62 return current;
63 }
64
65 public synchronized int compare_with( Object obj ) throws ObjectInvalid {
66 if( obj == null || current == null ) {
67 throw new ObjectInvalid();
68 }
69 check_object( obj );
70 Any key = ops.key( (Any )obj );
71 int result = ops.key_compare( current_key, key );
72 if( result == 0 ){
73 result = ops.compare( current, (Any )obj );
74 }
75 return result;
76 }
77
78 public synchronized boolean equal( Object obj1, Object obj2 ) throws ObjectInvalid {
79 if( obj1 == null || obj2 == null ){
80 throw new ObjectInvalid();
81 }
82 check_object( obj1 );
83 check_object( obj2 );
84 return ops.equal( (Any )obj1, (Any )obj2 );
85 }
86
87 public synchronized boolean equal( Object obj1 ) throws ObjectInvalid {
88 if( obj1 == null || current == null ) {
89 throw new ObjectInvalid();
90 }
91 check_object( obj1 );
92 return ops.equal( current, (Any )obj1 );
93 }
94
95 private void check_object( Object obj ) throws ObjectInvalid {
96 if( !( obj instanceof Any )
97 || !((Any )obj).type().equal( ops.element_type() ) ){
98 throw new ObjectInvalid();
99 }
100 }
101 }
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