cherry.goods.paginate.Range.java Source code

Introduction

Here is the source code for cherry.goods.paginate.Range.java

Source

/*
 * Copyright 2004,2015 agwlvssainokuni
 *
 * 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 cherry.goods.paginate;

import java.util.Iterator;

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

/**
 * ????????????
 */
public class Range implements Iterable<Long> {

    /** ? */
    private final long from;

    /** ? */
    private final long to;

    public Range(long from, long to) {
        this.from = from;
        this.to = to;
    }

    @Override
    public Iterator<Long> iterator() {
        return new Iterator<Long>() {

            private long current = from - 1L;

            @Override
            public boolean hasNext() {
                return current < to;
            }

            @Override
            public Long next() {
                if (current >= to) {
                    throw new IllegalStateException();
                }
                current += 1L;
                return current;
            }

            @Override
            public void remove() {
                // ???
            }
        };
    }

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

}