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1 package com.daffodilwoods.daffodildb.server.sql99.expression.
2 stringvalueexpression;
3
4 import com.daffodilwoods.daffodildb.server.sql99.common.*;
5 import com.daffodilwoods.daffodildb.server.sql99.expression.*;
6 import com.daffodilwoods.daffodildb.server.sql99.expression.rowvalueexpression.*;
7 import com.daffodilwoods.daffodildb.server.sql99.token.*;
8 import com.daffodilwoods.daffodildb.server.sql99.utils.*;
9 import com.daffodilwoods.daffodildb.utils.*;
10 import com.daffodilwoods.daffodildb.utils.field.*;
11 import com.daffodilwoods.database.resource.*;
12
13 public class concatenation extends AbstractValueExpression implements charactervalueexpression {
14 public characterfactor _characterfactor0;
15 public Sconcatenationoperator_247443092 _Sconcatenationoperator_2474430921;
16 public charactervalueexpression _charactervalueexpression2;
17
18 public Object  run(Object object) throws com.daffodilwoods.database.resource.
19 DException {
20
21 FieldBase firstOperand = (FieldBase) _charactervalueexpression2.run(object);
22 FieldBase secondOperand = (FieldBase) _characterfactor0.run(object);
23 if (firstOperand.isNull() && secondOperand.isNull()) {
24 return new FieldStringLiteral(FieldUtility.NULLBUFFERRANGE, Datatypes.CHARACTER);
25 }
26 return firstOperand.isNull() ? new FieldStringLiteral(secondOperand.getObject().toString(), Datatypes.CHARACTER)
27 : secondOperand.isNull() ? new FieldStringLiteral(firstOperand.getObject().toString(), Datatypes.CHARACTER) :
28 new FieldStringLiteral( (new StringBuffer (firstOperand.getObject().toString()).append(secondOperand.getObject().toString()).toString()), Datatypes.CHARACTER);
29
30 }
31
32 public AbstractRowValueExpression[] getChilds() {
33 AbstractRowValueExpression[] childs = new AbstractRowValueExpression[] {
34 (AbstractRowValueExpression) (_charactervalueexpression2),
35 (AbstractRowValueExpression) (_characterfactor0)};
36 return childs;
37 }
38
39 public String toString() {
40 StringBuffer sb = new StringBuffer ();
41 sb.append(" ");
42 sb.append(_charactervalueexpression2);
43 sb.append(" ");
44 sb.append(_Sconcatenationoperator_2474430921);
45 sb.append(" ");
46 sb.append(_characterfactor0);
47 return sb.toString();
48 }
49
50 public Object clone() throws CloneNotSupportedException {
51 concatenation tempClass = new concatenation();
52 tempClass._characterfactor0 = (characterfactor) _characterfactor0.clone();
53 tempClass._Sconcatenationoperator_2474430921 = (
54 Sconcatenationoperator_247443092) _Sconcatenationoperator_2474430921.
55 clone();
56 tempClass._charactervalueexpression2 = (charactervalueexpression)
57 _charactervalueexpression2.clone();
58 return tempClass;
59 }
60
61
62 public ParameterInfo[] getParameterInfo() throws DException {
63 if (!checkForVariableColumn())
64 return getThisParameterInfo();
65 ParameterInfo[] parameterInfo1 = _charactervalueexpression2.getParameterInfo();
66 ParameterInfo[] parameterInfo2 = _characterfactor0.getParameterInfo();
67 ParameterInfo[] parameterInfo = new ParameterInfo[parameterInfo1.length +
68 parameterInfo2.length];
69
70 int index = 0;
71 for (; index < parameterInfo1.length; ++index)
72 parameterInfo[index] = parameterInfo1[index];
73 for (int i = 0; i < parameterInfo2.length; ++i, ++index)
74 parameterInfo[index] = parameterInfo2[i];
75 return parameterInfo;
76
77 }
78
79 protected ParameterInfo[] getThisParameterInfo() throws DException {
80 ParameterInfo parameterInfo = new ParameterInfo();
81 parameterInfo.setName(toString());
82 parameterInfo.setDataType(Datatypes.CHARACTER);
83
84
85 return new ParameterInfo[] {
86 parameterInfo};
87 }
88
89 public ByteComparison getByteComparison(Object objct) throws DException {
90 return new ByteComparison(false, new int[] {Datatypes.CHARACTER});
91 }
92
93 private boolean checkForVariableColumn() throws DException {
94 for (int i = 0; i < columnDetails.length; ++i) {
95 if (columnDetails[i].getColumn().equals("?")) {
96 return true;
97 }
98 }
99 return false;
100 }
101
102
103
104
105 }
106 |
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