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74 lines
2.9 KiB
Java
74 lines
2.9 KiB
Java
// Copyright 2016 The Nomulus 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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