org.elasticsearch.common.unit.Percent Maven / Gradle / Ivy

/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.elasticsearch.common.unit;

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

import java.io.IOException;
import java.io.Serializable;

/**
 * @author kimchy (shay.banon)
 */
public class Percent implements Streamable, Serializable {

    private double value;

    public Percent(double value) {
        this.value = value;
    }

    public double value() {
        return value;
    }

    public String toString() {
        return format(value);
    }

    public static String format(double value) {
        String p = String.valueOf(value * 100.0);
        int ix = p.indexOf(".") + 1;
        return p.substring(0, ix) + p.substring(ix, ix + 1) + "%";
    }

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

    @Override public void writeTo(StreamOutput out) throws IOException {
        out.writeDouble(value);
    }
}