/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF 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.apache.geode.internal.cache;
import org.apache.geode.distributed.internal.DistributionConfig;
/**
* No instances of this class. Just some static method having to do with inline keys.
*
*/
public class InlineKeyHelper {
public static boolean INLINE_REGION_KEYS =
!Boolean.getBoolean(DistributionConfig.GEMFIRE_PREFIX + "DISABLE_INLINE_REGION_KEYS");
/**
* The maximum number of longs any of region entry subclasses use to store the string key inline.
*/
public static final int MAX_LONGS_USED_FOR_STRING_KEY = 2;
/**
* Given the number of longs used to encode the inline string return the maximum number of
* characters that can be encoded into that many longs.
*/
public static final int getMaxInlineStringKey(int longCount, boolean byteEncoded) {
return (longCount * (byteEncoded ? 8 : 4)) - 1;
}
/**
* Return null if the given string can not be encoded inline. Return true if the given string can
* be encoded inline as bytes. Return false if the given string can be encoded inline as chars.
*/
public static Boolean canStringBeInlineEncoded(String skey) {
if (skey.length() > getMaxInlineStringKey(MAX_LONGS_USED_FOR_STRING_KEY, true)) {
return null;
}
if (isByteEncodingOk(skey)) {
return Boolean.TRUE;
} else {
if (skey.length() > getMaxInlineStringKey(MAX_LONGS_USED_FOR_STRING_KEY, false)) {
return null;
} else {
return Boolean.FALSE;
}
}
}
private static boolean isByteEncodingOk(String skey) {
for (int i = 0; i < skey.length(); i++) {
if (skey.charAt(i) > 0x7f) {
return false;
}
}
return true;
}
}