cosmos.results.Column.java Source code

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Here is the source code for cosmos.results.Column.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.
 *
 *  Copyright 2013 Josh Elser
 *
 */
package cosmos.results;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;

import com.google.common.base.Preconditions;

public class Column implements Writable {
    private String name;

    protected Column() {
    }

    public Column(String name) {
        Preconditions.checkNotNull(name);
        this.name = name;
    }

    public String name() {
        return this.name;
    }

    public static Column create(String name) {
        return new Column(name);
    }

    public static Column recreate(DataInput in) throws IOException {
        final Column column = new Column();
        column.readFields(in);
        return column;
    }

    @Override
    public int hashCode() {
        return this.name.hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if (o instanceof Column) {
            return this.name.equals(((Column) o).name());
        }

        return false;
    }

    @Override
    public String toString() {
        return name.toString();
    }

    public void write(DataOutput out) throws IOException {
        Text.writeString(out, this.name);
    }

    public void readFields(DataInput in) throws IOException {
        this.name = Text.readString(in);
    }
}