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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.
75 lines
2.9 KiB
Java
75 lines
2.9 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.model;
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import static com.google.common.base.Predicates.assignableFrom;
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import static com.google.common.base.Predicates.or;
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import com.google.common.base.Function;
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import com.google.common.base.Joiner;
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import com.google.common.collect.FluentIterable;
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import com.google.common.collect.Ordering;
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import java.util.ArrayDeque;
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import java.util.Queue;
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import java.util.SortedSet;
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import java.util.TreeSet;
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/** Utility methods for getting the version of the model schema from the model code. */
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public final class SchemaVersion {
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/**
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* Returns a set of classes corresponding to all types persisted within the model classes, sorted
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* by the string representation.
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*/
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private static SortedSet<Class<?>> getAllPersistedTypes() {
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SortedSet<Class<?>> persistedTypes = new TreeSet<>(Ordering.usingToString());
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Queue<Class<?>> queue = new ArrayDeque<>();
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// Do a breadth-first search for persisted types, starting with @Entity types and expanding each
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// ImmutableObject by querying it for all its persisted field types.
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persistedTypes.addAll(EntityClasses.ALL_CLASSES);
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queue.addAll(persistedTypes);
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while (!queue.isEmpty()) {
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Class<?> clazz = queue.remove();
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if (ImmutableObject.class.isAssignableFrom(clazz)) {
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for (Class<?> persistedFieldType : ModelUtils.getPersistedFieldTypes(clazz)) {
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if (persistedTypes.add(persistedFieldType)) {
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// If we haven't seen this type before, add it to the queue to query its field types.
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queue.add(persistedFieldType);
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}
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}
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}
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}
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return persistedTypes;
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}
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/**
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* Return a string representing the schema which includes the definition of all persisted entity
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* types (and their field types, recursively). Each definition contains the field names and their
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* types (for classes), or else a list of all possible values (for enums).
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*/
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public static String getSchema() {
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return FluentIterable.from(getAllPersistedTypes())
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.filter(or(assignableFrom(Enum.class), assignableFrom(ImmutableObject.class)))
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.transform(new Function<Class<?>, String>() {
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@Override
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public String apply(Class<?> clazz) {
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return ModelUtils.getSchema(clazz);
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}})
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.join(Joiner.on('\n'));
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}
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private SchemaVersion() {}
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}
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