com.pingcap.tikv.util.KeyRangeUtils.java Source code

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Here is the source code for com.pingcap.tikv.util.KeyRangeUtils.java

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/*
 * Copyright 2017 PingCAP, Inc.
 *
 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.pingcap.tikv.util;

import com.google.common.collect.Range;
import com.google.protobuf.ByteString;
import com.pingcap.tikv.codec.TableCodec;
import com.pingcap.tikv.kvproto.Coprocessor;

public class KeyRangeUtils {
    public static Range toRange(Coprocessor.KeyRange range) {
        if (range == null || (range.getStart().isEmpty() && range.getEnd().isEmpty())) {
            return Range.all();
        }
        if (range.getStart().isEmpty()) {
            return Range.lessThan(Comparables.wrap(range.getEnd()));
        }
        if (range.getEnd().isEmpty()) {
            return Range.atLeast(Comparables.wrap(range.getStart()));
        }
        return Range.closedOpen(Comparables.wrap(range.getStart()), Comparables.wrap(range.getEnd()));
    }

    public static String toString(Coprocessor.KeyRange range) {
        return String.format("[%s, %s]", TableCodec.decodeRowKey(range.getStart()),
                TableCodec.decodeRowKey(range.getEnd()));
    }

    public static Range makeRange(ByteString startKey, ByteString endKey) {
        if (startKey.isEmpty() && endKey.isEmpty()) {
            return Range.all();
        }
        if (startKey.isEmpty()) {
            return Range.lessThan(Comparables.wrap(endKey));
        } else if (endKey.isEmpty()) {
            return Range.atLeast(Comparables.wrap(startKey));
        }
        return Range.closedOpen(Comparables.wrap(startKey), Comparables.wrap(endKey));
    }

    static String formatByteString(ByteString key) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < key.size(); i++) {
            sb.append(key.byteAt(i) & 0xff);
            if (i < key.size() - 1) {
                sb.append(",");
            }
        }
        return sb.toString();
    }
}