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The official Couchbase JVM Core IO Library
/*
* Copyright (c) 2018 Couchbase, 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,
* 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.couchbase.client.core.io;
import com.couchbase.client.core.util.UnsignedLEB128;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* The {@link CollectionMap} maps a locator to the encoded collection ID representation.
*/
public class CollectionMap {
/**
* Holds the actual inner map.
*/
private final ConcurrentHashMap inner = new ConcurrentHashMap<>();
/**
* Holds the identifier for the default collection.
*/
private static final byte[] DEFAULT_ID = UnsignedLEB128.encode(0);
/**
* Retrieves the collection id for the given identifier.
*
* Might return null if not found! Also it will return the default id for the default scope/collection.
*
* @param key the key to check
* @return the collection id.
*/
public byte[] get(final CollectionIdentifier key) {
if (key.isDefault()) {
return DEFAULT_ID;
}
return inner.get(key);
}
/**
* Stores a new collection ID with the given identifier.
*
* @param key the key to store.
* @param value the value associated.
*/
public void put(final CollectionIdentifier key, byte[] value) {
inner.put(key, value);
}
/**
* Checks if the given bucket is at all present in the map.
*
* @param bucket the bucket name to check
* @return true if so, false otherwise.
*/
public boolean hasBucketMap(final String bucket) {
for (CollectionIdentifier identifier : inner.keySet()) {
if (bucket.equals(identifier.bucket())) {
return true;
}
}
return false;
}
/**
* Returns the inner map, mainly for print/debug purposes.
*
* @return the inner map, immutable.
*/
public Map inner() {
return Collections.unmodifiableMap(inner);
}
}