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Diffstat (limited to 'gson/src/test/java/org/onap/policy/common/gson/internal/DataAdapterFactory.java')
-rw-r--r-- | gson/src/test/java/org/onap/policy/common/gson/internal/DataAdapterFactory.java | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/gson/src/test/java/org/onap/policy/common/gson/internal/DataAdapterFactory.java b/gson/src/test/java/org/onap/policy/common/gson/internal/DataAdapterFactory.java new file mode 100644 index 00000000..d0f0b1ec --- /dev/null +++ b/gson/src/test/java/org/onap/policy/common/gson/internal/DataAdapterFactory.java @@ -0,0 +1,310 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.gson.internal; + +import com.google.gson.Gson; +import com.google.gson.JsonArray; +import com.google.gson.JsonElement; +import com.google.gson.JsonObject; +import com.google.gson.TypeAdapter; +import com.google.gson.TypeAdapterFactory; +import com.google.gson.reflect.TypeToken; +import com.google.gson.stream.JsonReader; +import com.google.gson.stream.JsonWriter; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.Map; +import java.util.TreeMap; + +/** + * Factory used with test Data. + */ +public class DataAdapterFactory implements TypeAdapterFactory { + + /** + * Output of {@link #makeList()}, encoded as json. + */ + public static final String ENCODED_LIST = "[{'id':100},{'id':101}]".replace('\'', '"'); + + /** + * Output of {@link #makeMap()}, encoded as json. + */ + public static final String ENCODED_MAP = "'data-100':{'id':100},'data-101':{'id':101}".replace('\'', '"'); + + /** + * Object handled by this factory. + */ + public static class Data { + private int id; + + public Data() { + super(); + } + + public Data(int id) { + this.id = id; + } + + public int getId() { + return id; + } + + public void setId(int id) { + this.id = id; + } + + @Override + public String toString() { + return "Data [id=" + id + "]"; + } + } + + /** + * Object derived from Data. + */ + public static class DerivedData extends Data { + private String text; + + public DerivedData() { + super(); + } + + public DerivedData(int id, String text) { + super(id); + this.text = text; + } + + public String getText() { + return text; + } + + public void setText(String text) { + this.text = text; + } + + @Override + public String toString() { + return "DerivedData [text=" + text + ", toString()=" + super.toString() + "]"; + } + } + + /** + * Set to {@code true} when {@link #write(JsonWriter, Data)} has been invoked. + */ + private boolean dataWritten = false; + + /** + * Set to {@code true} when {@link #read(JsonReader)} has been invoked. + */ + private boolean dataRead = false; + + /** + * Clears the flags that indicate that "read" or "write" has been invoked. + */ + public void reset() { + dataWritten = true; + dataRead = true; + } + + public boolean isDataWritten() { + return dataWritten; + } + + public boolean isDataRead() { + return dataRead; + } + + /** + * Makes a list of Data. + * + * @return a new list of Data + */ + public static List<Data> makeList() { + List<Data> listField = new ArrayList<>(); + + listField.add(new Data(100)); + listField.add(new Data(101)); + + return listField; + } + + /** + * Makes an array of Data. + * + * @return a new array of Data + */ + public static JsonArray makeArray() { + JsonArray arr = new JsonArray(); + + for (Data data : makeList()) { + JsonObject json = new JsonObject(); + json.addProperty("id", data.getId()); + arr.add(json); + } + + return arr; + } + + /** + * Makes a map of Data. + * + * @return a new map of Data + */ + public static Map<String, List<Data>> makeMap() { + Map<String, List<Data>> map = new TreeMap<>(); + + for (Data data : makeList()) { + map.put("data-" + data.getId(), Arrays.asList(data)); + } + + return map; + } + + /** + * Adds Data objects to a tree, mirroring {@link #makeMap()}. + * + * @param tree tree into which objects are to be added + */ + public static void addToObject(JsonObject tree) { + for (JsonElement ent : makeArray()) { + JsonObject obj = ent.getAsJsonObject(); + JsonArray arr = new JsonArray(); + arr.add(obj); + tree.add("data-" + obj.get("id").getAsString(), arr); + } + } + + @SuppressWarnings("unchecked") + @Override + public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) { + if (type.getRawType() == Data.class) { + return (TypeAdapter<T>) new DataTypeAdapter(gson.getDelegateAdapter(this, TypeToken.get(Data.class)), + gson.getAdapter(JsonElement.class)); + } + + if (type.getRawType() == DerivedData.class) { + return (TypeAdapter<T>) new DerivedDataTypeAdapter( + gson.getDelegateAdapter(this, TypeToken.get(DerivedData.class)), + gson.getAdapter(JsonElement.class)); + } + + return null; + } + + /** + * Adapter for "Data". + */ + private class DataTypeAdapter extends TypeAdapter<Data> { + private TypeAdapter<Data> delegate; + private TypeAdapter<JsonElement> elementAdapter; + + /** + * Constructs the object. + * + * @param delegate delegate adapter + * @param elementAdapter element adapter + */ + public DataTypeAdapter(TypeAdapter<Data> delegate, TypeAdapter<JsonElement> elementAdapter) { + this.delegate = delegate; + this.elementAdapter = elementAdapter; + } + + @Override + public void write(JsonWriter out, Data data) throws IOException { + dataWritten = true; + + JsonElement tree = delegate.toJsonTree(data); + + if (tree.isJsonObject()) { + JsonObject jsonObj = tree.getAsJsonObject(); + jsonObj.addProperty("id", data.getId()); + } + + elementAdapter.write(out, tree); + } + + @Override + public Data read(JsonReader in) throws IOException { + dataRead = true; + + JsonElement tree = elementAdapter.read(in); + Data data = delegate.fromJsonTree(tree); + + if (tree.isJsonObject()) { + JsonObject jsonObj = tree.getAsJsonObject(); + data.setId(jsonObj.get("id").getAsInt()); + } + + return data; + } + } + /** + * Adapter for "DerivedData". + */ + private class DerivedDataTypeAdapter extends TypeAdapter<DerivedData> { + private TypeAdapter<DerivedData> delegate; + private TypeAdapter<JsonElement> elementAdapter; + + /** + * Constructs the object. + * + * @param delegate delegate adapter + * @param elementAdapter element adapter + */ + public DerivedDataTypeAdapter(TypeAdapter<DerivedData> delegate, TypeAdapter<JsonElement> elementAdapter) { + this.delegate = delegate; + this.elementAdapter = elementAdapter; + } + + @Override + public void write(JsonWriter out, DerivedData data) throws IOException { + dataWritten = true; + + JsonElement tree = delegate.toJsonTree(data); + + if (tree.isJsonObject()) { + JsonObject jsonObj = tree.getAsJsonObject(); + jsonObj.addProperty("id", data.getId()); + jsonObj.addProperty("text", data.getText()); + } + + elementAdapter.write(out, tree); + } + + @Override + public DerivedData read(JsonReader in) throws IOException { + dataRead = true; + + JsonElement tree = elementAdapter.read(in); + DerivedData data = delegate.fromJsonTree(tree); + + if (tree.isJsonObject()) { + JsonObject jsonObj = tree.getAsJsonObject(); + data.setId(jsonObj.get("id").getAsInt()); + data.setText(jsonObj.get("text").getAsString()); + } + + return data; + } + } +} |