/*
* Copyright (c) 2011. The Apache Software Foundation
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.expreval.expr.calculation;
import org.apache.expreval.client.NullColumnValueException;
import org.apache.expreval.client.ResultMissingColumnException;
import org.apache.expreval.expr.Operator;
import org.apache.expreval.expr.TypeSupport;
import org.apache.expreval.expr.node.DateValue;
import org.apache.expreval.expr.node.GenericValue;
import org.apache.expreval.expr.node.NumberValue;
import org.apache.expreval.expr.node.StringValue;
import org.apache.hadoop.hbase.hbql.client.HBqlException;
import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
import org.apache.hadoop.hbase.hbql.impl.InvalidTypeException;
public class DelegateCalculation extends GenericCalculation {
public DelegateCalculation(final GenericValue arg0, final Operator operator, final GenericValue arg1) {
super(null, arg0, operator, arg1);
}
public Class<? extends GenericValue> validateTypes(final GenericValue parentExpr,
final boolean allowCollections) throws HBqlException {
final Class<? extends GenericValue> type0 = this.getExprArg(0).validateTypes(this, false);
final Class<? extends GenericValue> type1 = this.getExprArg(1).validateTypes(this, false);
if (TypeSupport.isParentClass(StringValue.class, type0, type1))
this.setTypedExpr(new StringCalculation(this.getExprArg(0), this.getOperator(), this.getExprArg(1)));
else if (TypeSupport.isParentClass(NumberValue.class, type0, type1))
this.setTypedExpr(new NumericCalculation(this.getExprArg(0), this.getOperator(), this.getExprArg(1)));
else if (TypeSupport.isParentClass(DateValue.class, type0, type1))
this.setTypedExpr(new DateCalculation(this.getExprArg(0), this.getOperator(), this.getExprArg(1)));
else
throw new InvalidTypeException(this.getInvalidTypeMsg(type0, type1));
return this.getTypedExpr().validateTypes(parentExpr, false);
}
public GenericValue getOptimizedValue() throws HBqlException {
this.optimizeAllArgs();
return !this.isAConstant() ? this : this.getTypedExpr().getOptimizedValue();
}
public Object getValue(final HConnectionImpl conn, final Object object) throws HBqlException,
ResultMissingColumnException,
NullColumnValueException {
return this.getTypedExpr().getValue(conn, object);
}
}