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54 changes: 54 additions & 0 deletions
54
lib/src/main/java/com/diffplug/spotless/json/gson/GsonBuilderWrapper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| /* | ||
| * Copyright 2022 DiffPlug | ||
| * | ||
| * 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.diffplug.spotless.json.gson; | ||
|
|
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| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.Method; | ||
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| import com.diffplug.spotless.JarState; | ||
|
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| class GsonBuilderWrapper extends GsonWrapperBase { | ||
|
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| private final Constructor<?> constructor; | ||
| private final Method serializeNullsMethod; | ||
| private final Method disableHtmlEscapingMethod; | ||
| private final Method createMethod; | ||
|
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| GsonBuilderWrapper(JarState jarState) { | ||
| Class<?> clazz = loadClass(jarState.getClassLoader(), "com.google.gson.GsonBuilder"); | ||
| this.constructor = getConstructor(clazz); | ||
| this.serializeNullsMethod = getMethod(clazz, "serializeNulls"); | ||
| this.disableHtmlEscapingMethod = getMethod(clazz, "disableHtmlEscaping"); | ||
| this.createMethod = getMethod(clazz, "create"); | ||
| } | ||
|
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| Object createGsonBuilder() { | ||
| return newInstance(constructor); | ||
| } | ||
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| Object serializeNulls(Object gsonBuilder) { | ||
| return invoke(serializeNullsMethod, gsonBuilder); | ||
| } | ||
|
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| Object disableHtmlEscaping(Object gsonBuilder) { | ||
| return invoke(disableHtmlEscapingMethod, gsonBuilder); | ||
| } | ||
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| Object create(Object gsonBuilder) { | ||
| return invoke(createMethod, gsonBuilder); | ||
| } | ||
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| } |
106 changes: 106 additions & 0 deletions
106
lib/src/main/java/com/diffplug/spotless/json/gson/GsonStep.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| * Copyright 2022 DiffPlug | ||
| * | ||
| * 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.diffplug.spotless.json.gson; | ||
|
|
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| import java.io.IOException; | ||
| import java.io.Serializable; | ||
| import java.io.StringWriter; | ||
| import java.util.Collections; | ||
| import java.util.Objects; | ||
|
|
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| import com.diffplug.spotless.FormatterFunc; | ||
| import com.diffplug.spotless.FormatterStep; | ||
| import com.diffplug.spotless.JarState; | ||
| import com.diffplug.spotless.Provisioner; | ||
|
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| public class GsonStep { | ||
| private static final String MAVEN_COORDINATES = "com.google.code.gson:gson"; | ||
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| public static FormatterStep create(int indentSpaces, boolean sortByKeys, boolean escapeHtml, String version, Provisioner provisioner) { | ||
| Objects.requireNonNull(provisioner, "provisioner cannot be null"); | ||
| return FormatterStep.createLazy("gson", () -> new State(indentSpaces, sortByKeys, escapeHtml, version, provisioner), State::toFormatter); | ||
| } | ||
|
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| private static final class State implements Serializable { | ||
| private static final long serialVersionUID = -1493479043249379485L; | ||
|
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| private final int indentSpaces; | ||
| private final boolean sortByKeys; | ||
| private final boolean escapeHtml; | ||
| private final JarState jarState; | ||
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| private State(int indentSpaces, boolean sortByKeys, boolean escapeHtml, String version, Provisioner provisioner) throws IOException { | ||
| this.indentSpaces = indentSpaces; | ||
| this.sortByKeys = sortByKeys; | ||
| this.escapeHtml = escapeHtml; | ||
| this.jarState = JarState.from(MAVEN_COORDINATES + ":" + version, provisioner); | ||
| } | ||
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| FormatterFunc toFormatter() { | ||
| JsonWriterWrapper jsonWriterWrapper = new JsonWriterWrapper(jarState); | ||
| JsonElementWrapper jsonElementWrapper = new JsonElementWrapper(jarState); | ||
| JsonObjectWrapper jsonObjectWrapper = new JsonObjectWrapper(jarState, jsonElementWrapper); | ||
| GsonBuilderWrapper gsonBuilderWrapper = new GsonBuilderWrapper(jarState); | ||
| GsonWrapper gsonWrapper = new GsonWrapper(jarState, jsonElementWrapper, jsonWriterWrapper); | ||
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| Object gsonBuilder = gsonBuilderWrapper.serializeNulls(gsonBuilderWrapper.createGsonBuilder()); | ||
| if (!escapeHtml) { | ||
| gsonBuilder = gsonBuilderWrapper.disableHtmlEscaping(gsonBuilder); | ||
| } | ||
| Object gson = gsonBuilderWrapper.create(gsonBuilder); | ||
|
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| return inputString -> { | ||
| String result; | ||
| if (inputString.isEmpty()) { | ||
| result = ""; | ||
| } else { | ||
| Object jsonElement = gsonWrapper.fromJson(gson, inputString, jsonElementWrapper.getWrappedClass()); | ||
| if (jsonElement == null) { | ||
| throw new AssertionError(GsonWrapperBase.FAILED_TO_PARSE_ERROR_MESSAGE); | ||
| } | ||
| if (sortByKeys && jsonElementWrapper.isJsonObject(jsonElement)) { | ||
| jsonElement = sortByKeys(jsonObjectWrapper, jsonElementWrapper, jsonElement); | ||
| } | ||
| try (StringWriter stringWriter = new StringWriter()) { | ||
| Object jsonWriter = jsonWriterWrapper.createJsonWriter(stringWriter); | ||
| jsonWriterWrapper.setIndent(jsonWriter, generateIndent(indentSpaces)); | ||
| gsonWrapper.toJson(gson, jsonElement, jsonWriter); | ||
| result = stringWriter + "\n"; | ||
| } | ||
| } | ||
| return result; | ||
| }; | ||
| } | ||
|
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| private Object sortByKeys(JsonObjectWrapper jsonObjectWrapper, JsonElementWrapper jsonElementWrapper, Object jsonObject) { | ||
| Object result = jsonObjectWrapper.createJsonObject(); | ||
| jsonObjectWrapper.keySet(jsonObject).stream().sorted() | ||
| .forEach(key -> { | ||
| Object element = jsonObjectWrapper.get(jsonObject, key); | ||
| if (jsonElementWrapper.isJsonObject(element)) { | ||
| element = sortByKeys(jsonObjectWrapper, jsonElementWrapper, element); | ||
| } | ||
| jsonObjectWrapper.add(result, key, element); | ||
| }); | ||
| return result; | ||
| } | ||
|
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| private String generateIndent(int indentSpaces) { | ||
| return String.join("", Collections.nCopies(indentSpaces, " ")); | ||
| } | ||
| } | ||
|
|
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| } |
41 changes: 41 additions & 0 deletions
41
lib/src/main/java/com/diffplug/spotless/json/gson/GsonWrapper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * Copyright 2022 DiffPlug | ||
| * | ||
| * 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.diffplug.spotless.json.gson; | ||
|
|
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| import java.lang.reflect.Method; | ||
|
|
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| import com.diffplug.spotless.JarState; | ||
|
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| class GsonWrapper extends GsonWrapperBase { | ||
|
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| private final Method fromJsonMethod; | ||
| private final Method toJsonMethod; | ||
|
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| GsonWrapper(JarState jarState, JsonElementWrapper jsonElementWrapper, JsonWriterWrapper jsonWriterWrapper) { | ||
| Class<?> clazz = loadClass(jarState.getClassLoader(), "com.google.gson.Gson"); | ||
| this.fromJsonMethod = getMethod(clazz, "fromJson", String.class, Class.class); | ||
| this.toJsonMethod = getMethod(clazz, "toJson", jsonElementWrapper.getWrappedClass(), jsonWriterWrapper.getWrappedClass()); | ||
| } | ||
|
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| Object fromJson(Object gson, String json, Class<?> type) { | ||
| return invoke(fromJsonMethod, gson, json, type); | ||
| } | ||
|
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| void toJson(Object gson, Object jsonElement, Object jsonWriter) { | ||
| invoke(toJsonMethod, gson, jsonElement, jsonWriter); | ||
| } | ||
|
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| } |
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