com.google.uzaygezen.core.LongContent.java Source code

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Here is the source code for com.google.uzaygezen.core.LongContent.java

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/*
 * Copyright (C) 2012 Daniel Aioanei.
 *
 * 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.google.uzaygezen.core;

import java.math.BigInteger;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

import com.google.common.base.Objects;
import com.google.common.base.Preconditions;

/**
 * @author Daniel Aioanei
 */
public class LongContent implements Content<LongContent> {

    private long v;

    public LongContent(long v) {
        Preconditions.checkArgument(v >= 0);
        this.v = v;
    }

    public long value() {
        return v;
    }

    @Override
    public int compareTo(LongContent o) {
        return Long.compare(v, o.v);
    }

    @Override
    public void add(LongContent other) {
        v += other.v;
    }

    public LongContent clone() {
        return new LongContent(v);
    }

    @Override
    public int hashCode() {
        return ~Objects.hashCode(v);
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof LongContent)) {
            return false;
        }
        LongContent other = (LongContent) o;
        return v == other.v;
    }

    /**
     * If n is larger than 62 then the value becomes zero. This behaviour is
     * different from that of Java's shifting operators, but is similar to
     * that of {#link {@link BigInteger#shiftRight(int)}.
     */
    @Override
    public void shiftRight(int n) {
        Preconditions.checkArgument(n >= 0);
        // Since v is positive, it only has up to 63 useful bits.
        v >>>= Math.min(n, 63);
    }

    @Override
    public boolean isZero() {
        return v == 0;
    }

    @Override
    public boolean isOne() {
        return v == 1;
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}