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1 package com.daffodilwoods.daffodildb.server.sql99.expression.stringvalueexpression;
2
3 import com.daffodilwoods.daffodildb.server.sql99.common.*;
4 import com.daffodilwoods.daffodildb.server.sql99.expression.*;
5 import com.daffodilwoods.daffodildb.server.sql99.utils.*;
6 import com.daffodilwoods.database.resource.*;
7
8 public abstract class AbstractStringValueExpression extends AbstractValueExpression implements stringvalueexpression, _sortspecificationAndselectSubList, Datatypes, TypeConstants {
9
10 protected ColumnDetails column;
11 public ColumnDetails[] getColumnDetails() throws DException {
12 initializeChildren();
13 int len = childs.length;
14 column = new ColumnDetails();
15 String  type = getType(); StringBuffer str = new StringBuffer (); str.append(type);
18 str.append("(");
19 ColumnDetails[][] cds = new ColumnDetails[len][];
20 String [] namesOfColumn = new String [len];
21 for (int i = 0; i < childs.length; i++) {
22 cds[i] = childs[i].getColumnDetails();
23 namesOfColumn[i] = getNameOfColumn(cds[i]);
24 this.columnDetails = StaticClass.mergeColumnDetails(this.columnDetails, cds[i]);
25 str.append(namesOfColumn[i]);
26 str.append(",");
27 }
28 str.deleteCharAt(str.length() - 1);
29 str.append(")");
30
31 column.setFunctionType(type);
32 column.setType(SCALARFUNCTION);
33 column.setColumnName(new String [] {str.toString()});
34 column.setObject(this);
35 return new ColumnDetails[] {column};
36 }
37
38 public abstract String getType() throws DException;
40 protected String getNameOfColumn(ColumnDetails[] columnDetails) throws DException {
41 String nameOfColumn = "";
42 for (int i = 0; i < columnDetails.length; ++i) {
43 nameOfColumn += columnDetails[i].getColumn();
44 }
45 return nameOfColumn;
46 }
47
48 public Object run(Object object) throws com.daffodilwoods.database.resource.DException {
49
50 throw new java.lang.UnsupportedOperationException ("Method run() not yet implemented.");
51 }
52
53 public ColumnDetails[] getChildColumnDetails() throws DException {
54
55 throw new java.lang.UnsupportedOperationException ("Method getChildColumnDetails() not yet implemented.");
56 }
57
58 public ByteComparison getByteComparison(Object object) throws DException {
59 ByteComparison byteComparison =new ByteComparison(false, new int[] {Datatypes.CHARACTER});
60 byteComparison.setSize(getColumnSize(object));
61 return new ByteComparison(false, new int[] {Datatypes.CHARACTER});
62 }
63
64 public abstract int getColumnSize(Object object) throws DException;
65
66 public void releaseResource() throws DException {
67
68 }
69 public int getCardinality() throws DException {
70
71 return 1;
72 }
73
74
75
76 }
77 |
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