1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 package org.apache.expreval.expr.calculation;
22
23 import org.apache.expreval.client.NullColumnValueException;
24 import org.apache.expreval.client.ResultMissingColumnException;
25 import org.apache.expreval.expr.Operator;
26 import org.apache.expreval.expr.TypeSupport;
27 import org.apache.expreval.expr.node.DateValue;
28 import org.apache.expreval.expr.node.GenericValue;
29 import org.apache.expreval.expr.node.NumberValue;
30 import org.apache.expreval.expr.node.StringValue;
31 import org.apache.hadoop.hbase.hbql.client.HBqlException;
32 import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
33 import org.apache.hadoop.hbase.hbql.impl.InvalidTypeException;
34
35 public class DelegateCalculation extends GenericCalculation {
36
37 public DelegateCalculation(final GenericValue arg0, final Operator operator, final GenericValue arg1) {
38 super(null, arg0, operator, arg1);
39 }
40
41 public Class<? extends GenericValue> validateTypes(final GenericValue parentExpr,
42 final boolean allowCollections) throws HBqlException {
43
44 final Class<? extends GenericValue> type0 = this.getExprArg(0).validateTypes(this, false);
45 final Class<? extends GenericValue> type1 = this.getExprArg(1).validateTypes(this, false);
46
47 if (TypeSupport.isParentClass(StringValue.class, type0, type1))
48 this.setTypedExpr(new StringCalculation(this.getExprArg(0), this.getOperator(), this.getExprArg(1)));
49 else if (TypeSupport.isParentClass(NumberValue.class, type0, type1))
50 this.setTypedExpr(new NumericCalculation(this.getExprArg(0), this.getOperator(), this.getExprArg(1)));
51 else if (TypeSupport.isParentClass(DateValue.class, type0, type1))
52 this.setTypedExpr(new DateCalculation(this.getExprArg(0), this.getOperator(), this.getExprArg(1)));
53 else
54 throw new InvalidTypeException(this.getInvalidTypeMsg(type0, type1));
55
56 return this.getTypedExpr().validateTypes(parentExpr, false);
57 }
58
59 public GenericValue getOptimizedValue() throws HBqlException {
60 this.optimizeAllArgs();
61 return !this.isAConstant() ? this : this.getTypedExpr().getOptimizedValue();
62 }
63
64 public Object getValue(final HConnectionImpl conn, final Object object) throws HBqlException,
65 ResultMissingColumnException,
66 NullColumnValueException {
67 return this.getTypedExpr().getValue(conn, object);
68 }
69 }