|
1 package com.daffodilwoods.daffodildb.server.sql99.expression.datetimevalueexpression;
2
3 import java.math.*;
4 import java.sql.*;
5
6 import com.daffodilwoods.daffodildb.server.sql99.common.*;
7 import com.daffodilwoods.daffodildb.server.sql99.expression.*;
8 import com.daffodilwoods.daffodildb.server.sql99.expression.rowvalueexpression.*;
9 import com.daffodilwoods.daffodildb.utils.field.*;
10 import com.daffodilwoods.database.resource.*;
11 import com.daffodilwoods.database.utility.P;
12
13 public abstract class AbstractDateTimeValueFunction extends AbstractValueExpression implements datetimevalueexpression {
14
15
16 public abstract AbstractRowValueExpression[] getChilds();
17
18 public String  getType() throws DException {
19 throw new UnsupportedOperationException ("METHOD NOT IMPLEMENTED " + getClass());
20 }
21
22 ColumnDetails column;
23
24 public ColumnDetails[] getColumnDetails() throws DException {
25 initializeChildren();
26 ColumnDetails columnDetails[] = childs[0].getColumnDetails();
27 column = new ColumnDetails();
28 String nameOfColumn = getNameOfColumn(columnDetails);
29 String type = getType();
30 column.setFunctionType(type);
31 column.setType(SCALARFUNCTION);
32 column.setObject(this);
33 column.setColumnName(new String [] {type + "(" + nameOfColumn + ")"});
34 this.columnDetails = columnDetails;
35 return new ColumnDetails[] {column};
36 }
37
38 public Object run(Object object) throws com.daffodilwoods.database.resource.DException {
39 initializeChildren();
40 if (childs.length == 1) {
41 FieldBase result = (FieldBase) childs[0].run(object);
42 int type = result.getDatatype();
43 if (type == -1) {
44 result.setDatatype( -1);
45 type = result.getDatatype();
46 }
47 return getResult(type, result.getObject());
48 }
49 throw new DException("DSE3554", new Object [] {new Integer (1)});
50 }
51
52 protected Object getResult(int type, Object object) throws DException {
53 throw new UnsupportedOperationException ("METHOD NOT IMPLEMENTED " + getClass());
54 }
55
56 protected String getNameOfColumn(ColumnDetails[] columnDetails) throws DException {
57 String nameOfColumn = "";
58 for (int i = 0; i < columnDetails.length; ++i) {
59 nameOfColumn += columnDetails[i].getColumn();
60 }
61 return nameOfColumn;
62 }
63
64 public ColumnDetails[] getChildColumnDetails() throws DException {
65 return columnDetails;
66 }
67
68 protected boolean checkForVariableColumn() throws DException {
69 for (int i = 0; i < columnDetails.length; ++i) {
70 if (columnDetails[i].getColumn().equals("?")) {
71 return true;
72 }
73 }
74 return false;
75 }
76
77 public ParameterInfo[] getParameterInfo() throws DException {
78 initializeChildren();
79 ParameterInfo[] params = childs[0].getParameterInfo();
80 for (int i = 0; i < params.length; i++) {
81 if(params[i].getQuestionMark())
82 return params;
83 }
84 return getThisParameterInfo();
85
86 }
87
88 protected ParameterInfo[] getThisParameterInfo() throws DException {
89 throw new UnsupportedOperationException ("METHOD NOT IMPLEMENTED " + getClass());
90 }
91
92 protected int getDataType(Object object) throws DException {
93 if (object instanceof Integer ) {
94 return INTEGER;
95 } else if (object instanceof Float ) {
96 return FLOAT;
97 } else if (object instanceof Double ) {
98 return DOUBLE;
99 } else if (object instanceof Long ) {
100 return LONG;
101 } else if (object instanceof String ) {
102 return CHARACTER;
103 } else if (object instanceof Short ) {
104 return SHORT;
105 } else if (object instanceof BigDecimal) {
106 return BIGDECIMAL;
107 } else if (object instanceof Date) {
108 return DATE;
109 } else if (object instanceof Time) {
110 return TIME;
111 } else if (object instanceof Timestamp) {
112 return TIMESTAMP;
113 } else if (object instanceof Byte ) {
114 return BYTE;
115 } else {
116 throw new DException("DSE419", new Object [] {getType()});
117 }
118 }
119
120 public abstract int getColumnSize(Object object) throws DException ;
121
122 public void releaseResource() throws DException {
123
124 }
125
126 }
127 |
Popular Tags |
Java API By Example, From Geeks To Geeks.