/**
* 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.tajo.engine.eval;
import com.google.common.base.Objects;
import com.google.gson.annotations.Expose;
import org.apache.tajo.catalog.FunctionDesc;
import org.apache.tajo.catalog.Schema;
import org.apache.tajo.engine.function.GeneralFunction;
import org.apache.tajo.datum.Datum;
import org.apache.tajo.storage.Tuple;
import org.apache.tajo.storage.VTuple;
import org.apache.tajo.util.TUtil;
public class GeneralFunctionEval extends FunctionEval {
@Expose protected GeneralFunction instance;
private Tuple tuple;
private Tuple params = null;
private Schema schema;
public GeneralFunctionEval(FunctionDesc desc, GeneralFunction instance, EvalNode[] givenArgs) {
super(EvalType.FUNCTION, desc, givenArgs);
this.instance = instance;
this.instance.init(getParamType());
}
/* (non-Javadoc)
* @see nta.query.executor.eval.Expr#evalVal(Tuple)
*/
@Override
public void eval(EvalContext ctx, Schema schema, Tuple tuple) {
this.schema = schema;
this.tuple = tuple;
}
@Override
public Datum terminate(EvalContext ctx) {
FuncCallCtx localCtx = (FuncCallCtx) ctx;
if (this.params == null) {
params = new VTuple(argEvals.length);
}
if(argEvals != null) {
params.clear();
for(int i=0;i < argEvals.length; i++) {
argEvals[i].eval(localCtx.argCtxs[i], schema, tuple);
params.put(i, argEvals[i].terminate(localCtx.argCtxs[i]));
}
}
return instance.eval(params);
}
@Override
public boolean equals(Object obj) {
if (obj instanceof GeneralFunctionEval) {
GeneralFunctionEval other = (GeneralFunctionEval) obj;
return super.equals(other) &&
TUtil.checkEquals(instance, other.instance);
}
return false;
}
@Override
public int hashCode() {
return Objects.hashCode(funcDesc, instance);
}
@Override
public Object clone() throws CloneNotSupportedException {
GeneralFunctionEval eval = (GeneralFunctionEval) super.clone();
eval.instance = (GeneralFunction) instance.clone();
return eval;
}
}