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JAMES-2344 Strong type QuotaSize and QuotaCount to allow representing…
… more cases switch from long to strong type to prevent some error types and use Optional to force decision to happen in the right place. Also, it should be compatible with current stored quota in production but encoding to/from long is done at the protocol level now, as expected.
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90 changes: 90 additions & 0 deletions
90
mailbox/api/src/main/java/org/apache/james/mailbox/quota/QuotaCount.java
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|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| /**************************************************************** | ||
| * 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.james.mailbox.quota; | ||
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| import java.util.Optional; | ||
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| import com.google.common.base.MoreObjects; | ||
| import com.google.common.base.Objects; | ||
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| public class QuotaCount implements QuotaValue<QuotaCount> { | ||
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| public static QuotaCount unlimited() { | ||
| return new QuotaCount(Optional.empty()); | ||
| } | ||
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| public static QuotaCount count(long value) { | ||
| return new QuotaCount(Optional.of(value)); | ||
| } | ||
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| private final Optional<Long> value; | ||
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| private QuotaCount(Optional<Long> value) { | ||
| this.value = value; | ||
| } | ||
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| @Override | ||
| public long asLong() { | ||
| return value.orElseThrow(IllegalStateException::new); | ||
| } | ||
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| @Override | ||
| public boolean isLimited() { | ||
| return value.isPresent(); | ||
| } | ||
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| @Override | ||
| public QuotaCount add(long additionalValue) { | ||
| return new QuotaCount(value.map(x -> x + additionalValue)); | ||
| } | ||
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| @Override | ||
| public QuotaCount add(QuotaCount additionalValue) { | ||
| if (additionalValue.isUnlimited()) { | ||
| return unlimited(); | ||
| } | ||
| return new QuotaCount(value.map(x -> x + additionalValue.asLong())); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return MoreObjects.toStringHelper(this) | ||
| .add("value", value.map(String::valueOf).orElse("unlimited")) | ||
| .toString(); | ||
| } | ||
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| @Override | ||
| public boolean isGreaterThan(QuotaCount other) { | ||
| return value.orElse(Long.MAX_VALUE) > other.value.orElse(Long.MAX_VALUE); | ||
| } | ||
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| @Override | ||
| public final boolean equals(Object o) { | ||
| if (o instanceof QuotaCount) { | ||
| QuotaCount that = (QuotaCount) o; | ||
| return Objects.equal(this.value, that.value); | ||
| } | ||
| return false; | ||
| } | ||
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| @Override | ||
| public final int hashCode() { | ||
| return Objects.hashCode(value); | ||
| } | ||
| } |
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