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21 package org.apache.expreval.expr.ifthenstmt;
22
23 import org.apache.expreval.client.NullColumnValueException;
24 import org.apache.expreval.client.ResultMissingColumnException;
25 import org.apache.expreval.expr.TypeSupport;
26 import org.apache.expreval.expr.node.BooleanValue;
27 import org.apache.expreval.expr.node.ByteValue;
28 import org.apache.expreval.expr.node.DateValue;
29 import org.apache.expreval.expr.node.GenericValue;
30 import org.apache.expreval.expr.node.NumberValue;
31 import org.apache.expreval.expr.node.StringValue;
32 import org.apache.hadoop.hbase.hbql.client.HBqlException;
33 import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
34 import org.apache.hadoop.hbase.hbql.impl.InvalidTypeException;
35
36 public class DelegateIfThen extends GenericIfThen {
37
38 public DelegateIfThen(final GenericValue arg0, final GenericValue arg1, final GenericValue arg2) {
39 super(null, arg0, arg1, arg2);
40 }
41
42 public Class<? extends GenericValue> validateTypes(final GenericValue parentExpr,
43 final boolean allowCollections) throws HBqlException {
44
45 this.validateParentClass(BooleanValue.class, this.getExprArg(0).validateTypes(this, false));
46
47 final Class<? extends GenericValue> type1 = this.getExprArg(1).validateTypes(this, false);
48 final Class<? extends GenericValue> type2 = this.getExprArg(2).validateTypes(this, false);
49
50 if (TypeSupport.isParentClass(StringValue.class, type1, type2))
51 this.setTypedExpr(new StringIfThen(this.getExprArg(0), this.getExprArg(1), this.getExprArg(2)));
52 else if (TypeSupport.isParentClass(NumberValue.class, type1, type2))
53 this.setTypedExpr(new NumberIfThen(this.getExprArg(0), this.getExprArg(1), this.getExprArg(2)));
54 else if (TypeSupport.isParentClass(DateValue.class, type1, type2))
55 this.setTypedExpr(new DateIfThen(this.getExprArg(0), this.getExprArg(1), this.getExprArg(2)));
56 else if (TypeSupport.isParentClass(BooleanValue.class, type1, type2))
57 this.setTypedExpr(new BooleanIfThen(this.getExprArg(0), this.getExprArg(1), this.getExprArg(2)));
58 else if (TypeSupport.isParentClass(ByteValue.class, type1, type2))
59 this.setTypedExpr(new ByteIfThen(this.getExprArg(0), this.getExprArg(1), this.getExprArg(2)));
60 else
61 throw new InvalidTypeException(this.getInvalidTypeMsg(type1, type2));
62
63 return this.getTypedExpr().validateTypes(parentExpr, false);
64 }
65
66 public GenericValue getOptimizedValue() throws HBqlException {
67 this.optimizeAllArgs();
68 return !this.isAConstant() ? this : this.getTypedExpr().getOptimizedValue();
69 }
70
71 public Object getValue(final HConnectionImpl conn, final Object object) throws HBqlException,
72 ResultMissingColumnException,
73 NullColumnValueException {
74 return this.getTypedExpr().getValue(conn, object);
75 }
76 }