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1 package com.daffodilwoods.daffodildb.server.sql99.common;
2
3 import com.daffodilwoods.daffodildb.server.sql99.expression.
4 booleanvalueexpression.*;
5 import com.daffodilwoods.daffodildb.server.sql99.common.TypeConstants;
6 import java.util.ArrayList  ;
7 import com.daffodilwoods.database.resource.DException;
8
9
20 public class ConditionArray
21 implements TypeConstants {
22
23 public ArrayList conditionArray;
24 public ConditionArray() {
25 conditionArray = new ArrayList ();
26 }
27
28 public ConditionArray(ArrayList conditionArray) {
29 this.conditionArray = conditionArray;
30 }
31
32 public void addCondition(booleanvalueexpression condition) throws DException {
33 conditionArray.add(condition);
34 }
35
36
41 public TableDetails[] getTableDetails() throws DException {
42 ArrayList tableDetails = new ArrayList ();
43 for (int i = 0, size = conditionArray.size(); i < size; i++) {
44 ColumnDetails[] cds = ( (booleanvalueexpression) conditionArray.get(i)).
45 getColumnDetails();
46 TableDetails[] tds = getTableDetailsOfRefernceType(cds);
47 for (int j = 0; j < tds.length; j++) {
48 if (!tableDetails.contains(tds[j])) {
49 tableDetails.add(tds[j]);
50 }
51 }
52 }
53 return (TableDetails[]) tableDetails.toArray(new TableDetails[tableDetails.
54 size()]);
55 }
56
57
62 public TableDetails[] getTableDetails(TableDetails[] leftTableDetails) throws
63 DException {
64 ArrayList tableDetails = new ArrayList ();
65 for (int i = 0, size = conditionArray.size(); i < size; i++) {
66 booleanvalueexpression cond = (booleanvalueexpression) conditionArray.get(
67 i);
68 ColumnDetails[] cds = cond.getColumnDetails();
69 TableDetails[] tds = getTableDetailsOfRefernceType(cds);
70 if (cond.isNullPredicate() && containsTD(leftTableDetails, tds)) {
71 continue;
72 }
73 for (int j = 0; j < tds.length; j++) {
74 if (!tableDetails.contains(tds[j])) {
75 tableDetails.add(tds[j]);
76 }
77 }
78 }
79 return tableDetails.isEmpty() ? null :
80 (TableDetails[]) tableDetails.toArray(new TableDetails[tableDetails.
81 size()]);
82 }
83
84 private boolean containsTD(TableDetails[] scope, TableDetails[] target) throws
85 DException {
86 if (scope == null || target == null) {
87 return false;
88 }
89 for (int i = 0; i < scope.length; i++) {
90 for (int j = 0; j < target.length; j++) {
91 if (target[j] == scope[i]) {
92 return true;
93 }
94 }
95 }
96 return false;
97 }
98
99 public String toString() {
100 return conditionArray.toString();
101 }
102
103 public TableDetails[] getTableDetailsOfRefernceType(ColumnDetails[]
104 columnDetails) throws DException {
105 ArrayList aList = new ArrayList (5);
106 for (int i = 0; i < columnDetails.length; i++) {
107 if (columnDetails[i].getType() == REFERENCE) {
108 TableDetails table = columnDetails[i].getTableDetails();
109 if (!aList.contains(table))
110 aList.add(table);
111 }
112 }
113 return (TableDetails[]) aList.toArray(new TableDetails[aList.size()]);
114 }
115
116 public Object clone() throws CloneNotSupportedException {
117 ConditionArray array = new ConditionArray( (ArrayList ) conditionArray.clone());
118 return array;
119 }
120
121 }
122 |
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