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21 package org.apache.expreval.expr.casestmt;
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.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
34 public class DelegateCaseElse extends GenericCaseElse {
35
36 public DelegateCaseElse(final GenericValue arg0) {
37 super(null, arg0);
38 }
39
40 public Class<? extends GenericValue> validateTypes(final GenericValue parentExpr,
41 final boolean allowCollections) throws HBqlException {
42
43 final Class<? extends GenericValue> valueType = this.getExprArg(0).validateTypes(this, false);
44
45 if (TypeSupport.isParentClass(StringValue.class, valueType))
46 this.setTypedExpr(new StringCaseElse(this.getExprArg(0)));
47 else if (TypeSupport.isParentClass(NumberValue.class, valueType))
48 this.setTypedExpr(new NumberCaseElse(this.getExprArg(0)));
49 else if (TypeSupport.isParentClass(DateValue.class, valueType))
50 this.setTypedExpr(new DateCaseElse(this.getExprArg(0)));
51 else if (TypeSupport.isParentClass(BooleanValue.class, valueType))
52 this.setTypedExpr(new BooleanCaseElse(this.getExprArg(0)));
53 else
54 this.throwInvalidTypeException(valueType);
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 }