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1
33 package smallsql.database;
34
35
36 class ExpressionFunctionAbs extends ExpressionFunctionReturnP1 {
37
38 int getFunction(){ return SQLTokenizer.ABS; }
39
40
41 boolean getBoolean() throws Exception  {
42 return getDouble() != 0;
43 }
44
45 int getInt() throws Exception {
46 return Math.abs( param1.getInt() );
47 }
48
49 long getLong() throws Exception {
50 return Math.abs( param1.getLong() );
51 }
52
53 float getFloat() throws Exception {
54 return Math.abs( param1.getFloat() );
55 }
56
57 double getDouble() throws Exception {
58 return Math.abs( param1.getDouble() );
59 }
60
61 long getMoney() throws Exception {
62 return Math.abs( param1.getMoney() );
63 }
64
65 MutableNumeric getNumeric() throws Exception {
66 if(param1.isNull()) return null;
67 MutableNumeric num = param1.getNumeric();
68 if(num.getSignum() < 0) num.setSignum(1);
69 return num;
70 }
71
72 Object getObject() throws Exception {
73 if(param1.isNull()) return null;
74 Object para1 = param1.getObject();
75 switch(param1.getDataType()){
76 case SQLTokenizer.FLOAT:
77 case SQLTokenizer.DOUBLE:
78 double dValue = ((Double )para1).doubleValue();
79 return (dValue<0) ? new Double (-dValue) : para1;
80 case SQLTokenizer.REAL:
81 double fValue = ((Float )para1).floatValue();
82 return (fValue<0) ? new Float (-fValue) : para1;
83 case SQLTokenizer.BIGINT:
84 long lValue = ((Number )para1).longValue();
85 return (lValue<0) ? new Long (-lValue) : para1;
86 case SQLTokenizer.TINYINT:
87 case SQLTokenizer.SMALLINT:
88 case SQLTokenizer.INT:
89 int iValue = ((Number )para1).intValue();
90 return (iValue<0) ? new Integer (-iValue) : para1;
91 case SQLTokenizer.NUMERIC:
92 case SQLTokenizer.DECIMAL:
93 MutableNumeric nValue = (MutableNumeric)para1;
94 if(nValue.getSignum() <0) nValue.setSignum(1);
95 return nValue;
96 case SQLTokenizer.MONEY:
97 Money mValue = (Money)para1;
98 if(mValue.value <0) mValue.value = -mValue.value;
99 return mValue;
100 default: throw createUnspportedDataType(param1.getDataType());
101 }
102 }
103
104 String getString() throws Exception {
105 Object obj = getObject();
106 if(obj == null) return null;
107 return obj.toString();
108 }
109
110
111 } |
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