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1
21 package com.db4o;
22
23 import com.db4o.foundation.*;
24 import com.db4o.query.*;
25 import com.db4o.reflect.*;
26
27
33 public class QConClass extends QConObject{
34
35 private transient ReflectClass _claxx;
36 public String  _className;
37 public boolean i_equal;
38
39 public QConClass(){
40 }
42
43 QConClass(Transaction a_trans, QCon a_parent, QField a_field, ReflectClass claxx){
44 super(a_trans, a_parent, a_field, null);
45 if(claxx != null){
46 i_yapClass = a_trans.stream().produceYapClass(claxx);
47 if(claxx.equals(a_trans.stream().i_handlers.ICLASS_OBJECT)){
48 i_yapClass = (YapClass)((YapClassPrimitive)i_yapClass).i_handler;
49 }
50 }
51 _claxx = claxx;
52 }
53
54 public boolean canBeIndexLeaf(){
55 return false;
56 }
57
58 boolean evaluate(QCandidate a_candidate){
59 boolean res = true;
60 ReflectClass claxx = a_candidate.classReflector();
61 if(claxx == null){
62 res = false;
63 }else{
64 res = i_equal ? _claxx.equals(claxx) : _claxx.isAssignableFrom(claxx);
65 }
66 return i_evaluator.not(res);
67 }
68
69 void evaluateSelf() {
70
71 if(i_evaluator.isDefault()){
77 if(i_orderID == 0 && ! hasJoins()){
78 if(i_yapClass != null && i_candidates.i_yapClass != null){
79 if(i_yapClass.getHigherHierarchy(i_candidates.i_yapClass) == i_yapClass){
80 return;
81 }
82 }
83 }
84 }
85 i_candidates.filter(this);
86 }
87
88 public Constraint equal (){
89 synchronized(streamLock()){
90 i_equal = true;
91 return this;
92 }
93 }
94
95 boolean isNullConstraint() {
96 return false;
97 }
98
99 String logObject() {
100 if (Debug.queries) {
101 if(_claxx != null){
102 return _claxx.toString();
103 }
104 }
105 return "";
106 }
107
108 void marshall() {
109 super.marshall();
110 if(_claxx!=null) {
111 _className = _claxx.getName();
112 }
113 }
114
115 public String toString(){
116 if(! Debug4.prettyToStrings){
117 return super.toString();
118 }
119 String str = "QConClass ";
120 if(_claxx != null){
121 str += _claxx.toString() + " ";
122 }
123 return str + super.toString();
124 }
125
126 void unmarshall(Transaction a_trans) {
127 if (i_trans == null) {
128 super.unmarshall(a_trans);
129 if(_className!=null) {
130 _claxx = a_trans.reflector().forName(_className);
131 }
132 }
133 }
134
135 }
136
137 |
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