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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
57 lines
2 KiB
Java
57 lines
2 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.mapreduce.inputs;
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import com.google.appengine.tools.mapreduce.InputReader;
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import com.google.common.collect.ImmutableSet;
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import com.googlecode.objectify.Key;
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import google.registry.model.EppResource;
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import google.registry.model.index.EppResourceIndex;
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import google.registry.model.index.EppResourceIndexBucket;
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import java.util.NoSuchElementException;
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/**
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* Reader that maps over {@link EppResourceIndex} and returns resource keys.
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*
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* <p>When mapping over keys we can't distinguish between Objectify polymorphic types.
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*/
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class EppResourceKeyReader<R extends EppResource> extends EppResourceBaseReader<Key<R>> {
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private static final long serialVersionUID = -428232054739189774L;
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public EppResourceKeyReader(
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Key<EppResourceIndexBucket> bucketKey, ImmutableSet<Class<? extends R>> resourceClasses) {
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super(
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bucketKey,
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ONE_MB, // Estimate 1MB of memory for this reader, which is massive overkill.
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varargsToKinds(resourceClasses));
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}
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/**
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* Called for each map invocation.
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*
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* @throws NoSuchElementException if there are no more elements, as specified in the
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* {@link InputReader#next} Javadoc.
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*/
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@Override
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@SuppressWarnings("unchecked")
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public Key<R> next() throws NoSuchElementException {
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// This is a safe cast because we filtered on kind inside the query.
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return (Key<R>) nextEri().getReference().getKey();
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}
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}
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