|
1 package com.daffodilwoods.daffodildb.server.sql99.expression.
2 numericvalueexpression;
3
4 import java.math.*;
5
6 import com.daffodilwoods.daffodildb.server.serversystem.*;
7 import com.daffodilwoods.daffodildb.server.sql99.common.*;
8 import com.daffodilwoods.daffodildb.server.sql99.expression.*;
9 import com.daffodilwoods.daffodildb.server.sql99.utils.*;
10 import com.daffodilwoods.daffodildb.utils.field.*;
11 import com.daffodilwoods.database.resource.*;
12
13 public abstract class AbstractTerm
14 extends AbstractValueExpression
15 implements term, Datatypes {
16 public void checkSemantic(_ServerSession parent, ByteComparison bc1,
17 ByteComparison bc2) throws DException {
18 int type1 = bc1.getDataTypes()[0];
19 int type2 = bc2.getDataTypes()[0];
20 Check.checkForDatatypeForArthmeticOperations(type1, type2);
21 }
22
23 public Object  run(Object object) throws DException {
24 initializeChildren();
25 if (childs.length == 2) {
26 FieldBase result1 = (FieldBase) childs[0].run(object);
27 FieldBase result2 = (FieldBase) childs[1].run(object);
28 if (result1.isNull()) {
29 return result1;
30 }
31 if (result2.isNull()) {
32 return result2;
33 }
34 Object obj1 = result1.getObject();
35 Object obj2 = result2.getObject();
36 return getObject(result1.getDatatype(), result2.getDatatype(), obj1, obj2);
37 }
38 throw new DException("DSE3554", new Object [] {new Integer (2)});
39 }
40
41 public Object clone() throws CloneNotSupportedException {
42
43 throw new java.lang.UnsupportedOperationException (
44 "Method clone() not yet implemented.");
45 }
46
47 int getDataType(Object object, String name) throws DException {
48 if (object instanceof Integer ) {
49 return INTEGER;
50 }
51 else if (object instanceof Float ) {
52 return FLOAT;
53 }
54 else if (object instanceof Double ) {
55 return DOUBLE;
56 }
57 else if (object instanceof Long ) {
58 return LONG;
59 }
60 else if (object instanceof String ) {
61 return CHARACTER;
62 }
63 else if (object instanceof Short ) {
64 return SHORT;
65 }
66 else if (object instanceof BigDecimal) {
67 return BIGDECIMAL;
68 }
69 else {
70 throw new DException("DSE419", new Object [] {name});
71 }
72 }
73
74 protected int getDataType(Object object) throws DException {
75 throw new UnsupportedOperationException (" NOT IMPLEMENTED ");
76 }
77
78 public abstract FieldBase getObject(int type1, int type2, Object result1,
79 Object result2) throws DException;
80
81 public ParameterInfo[] getParameterInfo() throws DException {
82 initializeChildren();
83 Object [][] parms = new Object [childs.length][];
84 int length = 0;
85 for (int i = 0; i < childs.length; i++) {
86 parms[i] = childs[i] == null ? null : childs[i].getParameterInfo();
87 length += parms[i] == null ? 0 : parms[i].length;
88 }
89 ParameterInfo[] parameterInfo = new ParameterInfo[length];
90 int index = 0;
91 for (int i = 0; i < childs.length; i++) {
92 ParameterInfo[] par = GeneralPurposeStaticClass.changeIntoParameterInfo(
93 parms[i]);
94 for (int j = 0; j < par.length; j++) {
95 parameterInfo[index++] = par[j];
96 }
97 }
98 return parameterInfo;
99 }
100
101 public ByteComparison getByteComparison(Object object) throws DException {
102 initializeChildren();
103 int dataType = getAppropriateDataType(object);
104 return new ByteComparison(false, new int[] {dataType});
105 }
106
107 public void releaseResource() throws DException {
108 initializeChildren();
109 for (int i = 0; i < childs.length; i++) {
110 childs[i].releaseResource();
111 }
112 }
113
114 protected int getAppropriateDataType(Object object) throws DException {
115 int dataType1 = getDataTypeForByte(childs[0].getByteComparison(object));
116 int dataType2 = getDataTypeForByte(childs[1].getByteComparison(object));
117 return GeneralPurposeStaticClass.getDataTypeForArithmetic(dataType1,
118 dataType2);
119 }
120
121 protected void checkForQuestion(ColumnDetails[] leftCD, ColumnDetails[] rightCD) throws
122 DException {
123 int noOfQuestions = 0;
124 int leftQuestionMarks = checkInexp(leftCD, noOfQuestions);
125 noOfQuestions = 0;
126 int RightQuestionMarks = checkInexp(rightCD, noOfQuestions);
127 if (leftQuestionMarks >= 1 && RightQuestionMarks >= 1) {
128 throw new DException("DSE3550", null);
129 }
130 }
131
132 private int checkInexp(ColumnDetails[] cd, int noOfQuestions) throws
133 DException {
134 for (int i = 0; i < cd.length; i++) {
135 int type = cd[i].getType();
136 if (cd[i].getQuestion()) {
137 noOfQuestions++;
138 }
139 if (type == FUNCTIONAL || type == GROUPING ||
140 type == SCALARFUNCTION ||
141 type == CASEEXPRESSION || type == USERFUNCTION) {
142 ColumnDetails[] cdChild = cd[i].getChildColumnDetails();
143 noOfQuestions = noOfQuestions + checkInexp(cdChild, noOfQuestions);
144 }
145 }
146 return noOfQuestions;
147 }
148 }
149 |
Popular Tags |
Java API By Example, From Geeks To Geeks.