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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.
91 lines
3 KiB
Java
91 lines
3 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 com.google.common.base.Function;
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import com.google.common.base.Functions;
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import com.google.common.collect.FluentIterable;
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import java.util.Collections;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import javax.annotation.Nullable;
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/**
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* Helper class for {@link Jsonifiable} classes to generate JSON maps for RPC responses.
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*
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* <p>The returned map is mutable. Map entries can be {@code null} but list entries can not. If a
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* list is passed as {@code null}, it'll be substituted with empty list. Lists are not mutable.
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*/
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public final class JsonMapBuilder {
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private static final Function<Jsonifiable, Map<String, Object>> TO_JSON_OBJECT =
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new Function<Jsonifiable, Map<String, Object>>() {
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@Override
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public Map<String, Object> apply(Jsonifiable input) {
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return input.toJsonMap();
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}};
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private final Map<String, Object> map = new LinkedHashMap<>();
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public JsonMapBuilder put(String name, @Nullable Boolean value) {
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map.put(name, value);
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return this;
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}
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public JsonMapBuilder put(String name, @Nullable Number value) {
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map.put(name, value);
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return this;
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}
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public JsonMapBuilder put(String name, @Nullable String value) {
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map.put(name, value);
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return this;
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}
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public JsonMapBuilder put(String name, @Nullable Jsonifiable value) {
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map.put(name, value == null ? null : value.toJsonMap());
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return this;
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}
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public JsonMapBuilder put(String name, @Nullable Enum<?> value) {
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map.put(name, value == null ? null : value.name());
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return this;
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}
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public <T> JsonMapBuilder putString(String name, @Nullable T value) {
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map.put(name, value == null ? null : value.toString());
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return this;
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}
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public <T> JsonMapBuilder putListOfStrings(String name, @Nullable Iterable<T> value) {
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map.put(name, value == null ? Collections.EMPTY_LIST
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: FluentIterable.from(value).transform(Functions.toStringFunction()).toList());
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return this;
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}
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public JsonMapBuilder putListOfJsonObjects(
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String name, @Nullable Iterable<? extends Jsonifiable> value) {
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map.put(name, value == null ? Collections.EMPTY_LIST
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: FluentIterable.from(value).transform(TO_JSON_OBJECT).toList());
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return this;
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}
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/** Returns mutable JSON object. Please dispose of the builder object after calling me. */
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public Map<String, Object> build() {
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return map;
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}
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}
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