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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.DelegateStmt;
26 import org.apache.expreval.expr.ExpressionType;
27 import org.apache.expreval.expr.node.GenericValue;
28 import org.apache.hadoop.hbase.hbql.client.HBqlException;
29 import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
30
31 public abstract class GenericCaseWhen extends DelegateStmt<GenericCaseWhen> {
32
33 protected GenericCaseWhen(final ExpressionType type,
34 final GenericValue arg0,
35 final GenericValue arg1) {
36 super(type, arg0, arg1);
37 }
38
39 public boolean getPredicateValue(final HConnectionImpl conn, final Object object) throws HBqlException,
40 ResultMissingColumnException,
41 NullColumnValueException {
42 return (Boolean)this.getExprArg(0).getValue(conn, object);
43 }
44
45 public Object getValue(final HConnectionImpl conn, final Object object) throws HBqlException,
46 ResultMissingColumnException,
47 NullColumnValueException {
48 return this.getExprArg(1).getValue(conn, object);
49 }
50
51 public String asString() {
52 return "WHEN " + this.getExprArg(0).asString() + " THEN " + this.getExprArg(1).asString() + " ";
53 }
54 }