/*
 * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
 * license agreements.  See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial agreement.
 */

package io.crate.planner.symbol;

import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;

import java.io.IOException;

/**
 * A symbol which represents a column of a result array
 */
public class InputColumn extends Symbol {

    public static final SymbolFactory<InputColumn> FACTORY = new SymbolFactory<InputColumn>() {
        @Override
        public InputColumn newInstance() {
            return new InputColumn();
        }
    };


    private int index;

    public InputColumn(int index) {
        this.index = index;
    }

    public InputColumn() {

    }

    public int index() {
        return index;
    }

    @Override
    public SymbolType symbolType() {
        return SymbolType.INPUT_COLUMN;
    }

    @Override
    public <C, R> R accept(SymbolVisitor<C, R> visitor, C context) {
        return visitor.visitInputColumn(this, context);
    }

    @Override
    public void readFrom(StreamInput in) throws IOException {
        index = in.readVInt();
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        out.writeVInt(index);
    }
}

@@ -1048,16 +1048,55 @@
 ymbol;%0A%0A
+import com.google.common.base.Objects;%0A
 import o
@@ -1331,16 +1331,51 @@
 s Symbol
+ implements Comparable%3CInputColumn%3E
  %7B%0A%0A    
@@ -2238,11 +2238,286 @@
 );%0A    %7D
+%0A%0A    @Override%0A    public int compareTo(InputColumn o) %7B%0A        return Integer.compare(index, o.index);%0A    %7D%0A%0A    @Override%0A    public String toString() %7B%0A        return Objects.toStringHelper(this)%0A                .add(%22index%22, index)%0A                .toString();%0A    %7D%0A%0A
 %0A%7D%0A

make input column comparable