org.apache.impala.analysis.FunctionArgs.java Source code

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Here is the source code for org.apache.impala.analysis.FunctionArgs.java

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// 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.impala.analysis;

import java.util.ArrayList;

import org.apache.impala.catalog.Type;
import org.apache.impala.common.AnalysisException;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;

// Wrapper class around argument types and if it has varArgs
public class FunctionArgs implements ParseNode {
    private final ArrayList<TypeDef> argTypeDefs_;
    private boolean hasVarArgs_;

    // Result of analysis.
    private ArrayList<Type> argTypes_;

    public FunctionArgs() {
        argTypeDefs_ = Lists.newArrayList();
        hasVarArgs_ = false;
    }

    public FunctionArgs(ArrayList<TypeDef> argTypeDefs, boolean varArgs) {
        argTypeDefs_ = argTypeDefs;
        hasVarArgs_ = varArgs;
        if (varArgs)
            Preconditions.checkState(argTypeDefs.size() > 0);
    }

    public void setHasVarArgs(boolean b) {
        {
            Preconditions.checkState(argTypeDefs_.size() > 0);
            hasVarArgs_ = b;
        }
    }

    @Override
    public void analyze(Analyzer analyzer) throws AnalysisException {
        ArrayList<Type> argTypes = Lists.newArrayListWithCapacity(argTypeDefs_.size());
        for (TypeDef typeDef : argTypeDefs_) {
            typeDef.analyze(analyzer);
            argTypes.add(typeDef.getType());
        }
        argTypes_ = argTypes;
    }

    public ArrayList<TypeDef> getArgTypeDefs() {
        return argTypeDefs_;
    }

    public ArrayList<Type> getArgTypes() {
        return argTypes_;
    }

    public boolean hasVarArgs() {
        return hasVarArgs_;
    }

    @Override
    public String toSql() {
        return null;
    }
}