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/*
 * Copyright 2012 Lincoln Baxter, III
 * 
 * Licensed 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 com.yy.androidlib.util.prettytime.impl;

import com.yy.androidlib.util.prettytime.Duration;
import com.yy.androidlib.util.prettytime.TimeUnit;

public class DurationImpl implements Duration {
    private long quantity;
    private long delta;
    private TimeUnit unit;

    @Override
    public long getQuantity() {
        return quantity;
    }

    public void setQuantity(final long quantity) {
        this.quantity = quantity;
    }

    @Override
    public TimeUnit getUnit() {
        return unit;
    }

    public void setUnit(final TimeUnit unit) {
        this.unit = unit;
    }

    @Override
    public long getDelta() {
        return delta;
    }

    public void setDelta(final long delta) {
        this.delta = delta;
    }

    @Override
    public boolean isInPast() {
        return getQuantity() < 0;
    }

    @Override
    public boolean isInFuture() {
        return !isInPast();
    }

    @Override
    public long getQuantityRounded(int tolerance) {
        long quantity = Math.abs(getQuantity());

        if (getDelta() != 0) {
            double threshold = Math.abs(((double) getDelta() / (double) getUnit().getMillisPerUnit()) * 100);
            if (threshold > tolerance) {
                quantity = quantity + 1;
            }
        }
        return quantity;
    }
}