--- /dev/null
+/*
+ * ============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;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/**
+ * Converter for Double values. By default, GSON treats all Objects that are numbers, as
+ * Double. This converts Doubles to Integer or Long, if possible. It converts stand-alone
+ * Doubles, as well as those found within Arrays and Maps.
+ */
+public class DoubleConverter {
+
+ private DoubleConverter() {
+ // do nothing
+ }
+
+ /**
+ * Performs in-place conversion of all values in a list.
+ *
+ * @param list the list whose values are to be converted
+ */
+ public static void convertFromDouble(List<Object> list) {
+ if (list == null) {
+ return;
+ }
+
+ List<Object> original = new ArrayList<>(list);
+
+ list.clear();
+ original.forEach(item -> list.add(convertFromDouble(item)));
+ }
+
+ /**
+ * Performs in-place conversion of all values in a map.
+ *
+ * @param map the map whose values are to be converted
+ */
+ public static void convertFromDouble(Map<String, Object> map) {
+ if (map == null) {
+ return;
+ }
+
+ Set<Entry<String, Object>> set = map.entrySet();
+
+ for (Entry<String, Object> entry : set) {
+ entry.setValue(convertFromDouble(entry.getValue()));
+ }
+ }
+
+ /**
+ * Converts a value. If the value is a List, then it recursively converts the
+ * entries of the List. Likewise with a map, however, the map is converted in place.
+ *
+ * @param value value to be converted
+ * @return the converted value
+ */
+ @SuppressWarnings({"unchecked"})
+ public static Object convertFromDouble(Object value) {
+ if (value == null) {
+ return value;
+ }
+
+ if (value instanceof List) {
+ convertFromDouble((List<Object>) value);
+ return value;
+ }
+
+ if (value instanceof Map) {
+ convertFromDouble((Map<String, Object>) value);
+ return value;
+ }
+
+ if (!(value instanceof Double)) {
+ return value;
+ }
+
+ Double num = (Double) value;
+ long longval = num.longValue();
+
+ if (Double.compare(num.doubleValue(), longval) != 0) {
+ // it isn't integral - return unchanged value
+ return value;
+ }
+
+ // it's integral - determine if it's an integer or a long
+ int intval = (int) longval;
+
+ if (intval == longval) {
+ return intval;
+ }
+
+ return longval;
+ }
+}
import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
+import java.util.List;
import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
/**
- * Adapter factory for Map<String,Object>. By default, GSON treats all Objects, that
- * are numbers, as Double. This walks the map and converts Doubles to Integer or Long, if
+ * Adapter factory for Map<String,Object> and List<String>. By default, GSON treats all Objects, that
+ * are numbers, as Double. This recursively walks a map/list and converts Doubles to Integer or Long, if
* possible.
*/
public class MapDoubleAdapterFactory implements TypeAdapterFactory {
@Override
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
- if (type.getRawType() != Map.class) {
+ if (!isMapType(type) && !isListType(type)) {
return null;
}
+ TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type);
+
+ return new MapAdapter<>(delegate);
+ }
+
+ private <T> boolean isMapType(TypeToken<T> type) {
+ if (type.getRawType() != Map.class) {
+ return false;
+ }
+
Type[] actualParams = ((ParameterizedType) type.getType()).getActualTypeArguments();
// only supports Map<String,Object>
- if (actualParams[0] != String.class || actualParams[1] != Object.class) {
- return null;
+ return (actualParams[0] == String.class && actualParams[1] == Object.class);
+ }
+
+ private <T> boolean isListType(TypeToken<T> type) {
+ if (type.getRawType() != List.class) {
+ return false;
}
- TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type);
+ Type[] actualParams = ((ParameterizedType) type.getType()).getActualTypeArguments();
- return new MapAdapter<>(delegate);
+ // only supports List<Object>
+ return (actualParams[0] == Object.class);
}
/**
public T read(JsonReader in) throws IOException {
T value = delegate.read(in);
- @SuppressWarnings("rawtypes")
- Map map = (Map) value;
-
- convertFromDouble(map);
+ DoubleConverter.convertFromDouble(value);
return value;
}
-
- /**
- * Performs conversion of all values in a map.
- *
- * @param map the map whose values are to be converted
- */
- @SuppressWarnings("rawtypes")
- private void convertFromDouble(Map map) {
-
- @SuppressWarnings("unchecked")
- Set<Entry> set = map.entrySet();
-
- for (Entry entry : set) {
- convertFromDouble(entry);
- }
- }
-
- /**
- * Converts an entry's value. If the value is a Map, then it recursively converts
- * the entries of the map.
- *
- * @param entry entry whose value is to be converted
- */
- @SuppressWarnings({"unchecked", "rawtypes"})
- private void convertFromDouble(Entry entry) {
- Object obj = entry.getValue();
-
- if (obj instanceof Map) {
- convertFromDouble((Map) obj);
- return;
- }
-
- if (!(obj instanceof Double)) {
- return;
- }
-
- Double num = (Double) obj;
- long longval = num.longValue();
-
- if (Double.compare(num.doubleValue(), longval) == 0) {
- // it's integral - determine if it's an integer or a long
- int intval = (int) longval;
-
- if (intval == longval) {
- // it fits in an integer
- entry.setValue(intval);
-
- } else {
- // doesn't fit in an integer - must be a long
- entry.setValue(longval);
- }
- }
- }
}
}
--- /dev/null
+/*
+ * ============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;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import org.junit.Test;
+
+public class DoubleConverterTest {
+
+ @Test
+ @SuppressWarnings("unchecked")
+ public void testConvertFromDoubleObject() {
+ // these should be unchanged
+ assertNull(DoubleConverter.convertFromDouble((Object) null));
+ assertEquals("hello", DoubleConverter.convertFromDouble("hello"));
+ assertEquals("10.0", DoubleConverter.convertFromDouble("10.0"));
+ assertEquals(12.5, DoubleConverter.convertFromDouble(12.5));
+ assertEquals(12, DoubleConverter.convertFromDouble(12));
+ assertEquals(12L, DoubleConverter.convertFromDouble(12L));
+
+ // positive and negative int
+ assertEquals(10, DoubleConverter.convertFromDouble(10.0));
+ assertEquals(-10, DoubleConverter.convertFromDouble(-10.0));
+
+ // positive and negative long
+ assertEquals(100000000000L, DoubleConverter.convertFromDouble(100000000000.0));
+ assertEquals(-100000000000L, DoubleConverter.convertFromDouble(-100000000000.0));
+
+ // list
+ List<Object> list = new ArrayList<>();
+ list.add("list");
+ list.add(null);
+ list.add(21.0);
+ list = (List<Object>) DoubleConverter.convertFromDouble((Object) list);
+ assertEquals("[list, null, 21]", list.toString());
+
+ // map
+ Map<String,Object> map = new LinkedHashMap<>();
+ map.put("map-A", "map-value");
+ map.put("map-B", null);
+ map.put("map-C", 22.0);
+ map = (Map<String, Object>) DoubleConverter.convertFromDouble((Object) map);
+ assertEquals("{map-A=map-value, map-B=null, map-C=22}", map.toString());
+ }
+
+ @Test
+ public void testConvertFromDoubleList() {
+ // null is ok
+ DoubleConverter.convertFromDouble((List<Object>) null);
+
+ List<Object> list = new ArrayList<>();
+ list.add("world");
+ list.add(20.0);
+
+ List<Object> nested = new ArrayList<>();
+ list.add(nested);
+ nested.add(30.0);
+
+ DoubleConverter.convertFromDouble(list);
+
+ assertEquals("[world, 20, [30]]", list.toString());
+ }
+
+ @Test
+ public void testConvertFromDoubleMap() {
+ // null is ok
+ DoubleConverter.convertFromDouble((Map<String,Object>) null);
+
+ Map<String,Object> map = new LinkedHashMap<>();
+ map.put("keyA", "valueA");
+ map.put("keyB", 200.0);
+
+ Map<String,Object> nested = new LinkedHashMap<>();
+ map.put("keyC", nested);
+ nested.put("nested-key", 201.0);
+
+ DoubleConverter.convertFromDouble(map);
+ assertEquals("{keyA=valueA, keyB=200, keyC={nested-key=201}}", map.toString());
+ }
+}
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
+import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
+import java.util.List;
import java.util.Map;
import org.junit.Test;
@Test
@SuppressWarnings("unchecked")
- public void test() {
+ public void testMap() {
MyMap map = new MyMap();
- map.props = new HashMap<>();
- map.props.put("plainString", "def");
- map.props.put("posInt", 10);
- map.props.put("negInt", -10);
- map.props.put("doubleVal", 12.5);
- map.props.put("posLong", 100000000000L);
- map.props.put("negLong", -100000000000L);
+ map.data = new HashMap<>();
+ map.data.put("plainString", "def");
+ map.data.put("posInt", 10);
+ map.data.put("negInt", -10);
+ map.data.put("doubleVal", 12.5);
+ map.data.put("posLong", 100000000000L);
+ map.data.put("negLong", -100000000000L);
Map<String, Object> nested = new LinkedHashMap<>();
- map.props.put("nestedMap", nested);
+ map.data.put("nestedMap", nested);
nested.put("nestedString", "world");
nested.put("nestedInt", 50);
String json = gson.toJson(map);
- map.props.clear();
+ map.data.clear();
map = gson.fromJson(json, MyMap.class);
assertEquals(json, gson.toJson(map));
- assertEquals(10, map.props.get("posInt"));
- assertEquals(-10, map.props.get("negInt"));
- assertEquals(100000000000L, map.props.get("posLong"));
- assertEquals(-100000000000L, map.props.get("negLong"));
- assertEquals(12.5, map.props.get("doubleVal"));
- assertEquals(nested, map.props.get("nestedMap"));
+ assertEquals(10, map.data.get("posInt"));
+ assertEquals(-10, map.data.get("negInt"));
+ assertEquals(100000000000L, map.data.get("posLong"));
+ assertEquals(-100000000000L, map.data.get("negLong"));
+ assertEquals(12.5, map.data.get("doubleVal"));
+ assertEquals(nested, map.data.get("nestedMap"));
- nested = (Map<String, Object>) map.props.get("nestedMap");
+ nested = (Map<String, Object>) map.data.get("nestedMap");
assertEquals(50, nested.get("nestedInt"));
}
+ @Test
+ public void testList() {
+ MyList list = new MyList();
+ list.data = new ArrayList<>();
+ list.data.add("ghi");
+ list.data.add(100);
+
+ List<Object> nested = new ArrayList<>();
+ list.data.add(nested);
+ nested.add("world2");
+ nested.add(500);
+
+ String json = gson.toJson(list);
+
+ list.data.clear();
+ list = gson.fromJson(json, MyList.class);
+
+ assertEquals(json, gson.toJson(list));
+
+ assertEquals("[ghi, 100, [world2, 500]]", list.data.toString());
+ }
+
@Test
public void test_ValueIsNotObject() {
MyDoubleMap map = new MyDoubleMap();
- map.props = new LinkedHashMap<>();
- map.props.put("plainDouble", 13.5);
- map.props.put("doubleAsInt", 100.0);
+ map.data = new LinkedHashMap<>();
+ map.data.put("plainDouble", 13.5);
+ map.data.put("doubleAsInt", 100.0);
String json = gson.toJson(map);
- map.props.clear();
+ map.data.clear();
map = gson.fromJson(json, MyDoubleMap.class);
// everything should still be Double - check by simply accessing
- map.props.get("plainDouble");
- map.props.get("doubleAsInt");
+ map.data.get("plainDouble");
+ map.data.get("doubleAsInt");
}
@Test
public void test_KeyIsNotString() {
MyObjectMap map = new MyObjectMap();
- map.props = new LinkedHashMap<>();
- map.props.put("plainDouble2", 14.5);
- map.props.put("doubleAsInt2", 200.0);
+ map.data = new LinkedHashMap<>();
+ map.data.put("plainDouble2", 14.5);
+ map.data.put("doubleAsInt2", 200.0);
String json = gson.toJson(map);
- map.props.clear();
+ map.data.clear();
map = gson.fromJson(json, MyObjectMap.class);
// everything should still be Double
- assertEquals(14.5, map.props.get("plainDouble2"));
- assertEquals(200.0, map.props.get("doubleAsInt2"));
+ assertEquals(14.5, map.data.get("plainDouble2"));
+ assertEquals(200.0, map.data.get("doubleAsInt2"));
+ }
+
+ @Test
+ public void test_ListValueIsNotObject() {
+ MyDoubleList list = new MyDoubleList();
+ list.data = new ArrayList<>();
+ list.data.add(13.5);
+ list.data.add(100.0);
+
+ String json = gson.toJson(list);
+
+ list.data.clear();
+ list = gson.fromJson(json, MyDoubleList.class);
+
+ // everything should still be Double - check by simply accessing
+ assertEquals("[13.5, 100.0]", list.data.toString());
}
private static class MyMap {
- private Map<String, Object> props;
+ private Map<String, Object> data;
}
private static class MyDoubleMap {
- private Map<String, Double> props;
+ private Map<String, Double> data;
}
private static class MyObjectMap {
- private Map<Object, Object> props;
+ private Map<Object, Object> data;
+ }
+
+ private static class MyList {
+ private List<Object> data;
+ }
+
+ private static class MyDoubleList {
+ private List<Double> data;
}
}
import java.io.Reader;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
+import org.onap.policy.common.gson.DoubleConverter;
import org.onap.policy.common.gson.MapDoubleAdapterFactory;
/**
* @return the object represented by the given json string
*/
protected <T> T fromJson(String json, Class<T> clazz) {
- return GSON.fromJson(json, clazz);
+ return convertFromDouble(clazz, GSON.fromJson(json, clazz));
}
/**
* @return the object represented by the given json string
*/
protected <T> T fromJson(Reader source, Class<T> clazz) {
- return GSON.fromJson(source, clazz);
+ return convertFromDouble(clazz, GSON.fromJson(source, clazz));
+ }
+
+ /**
+ * Converts a value from Double to Integer/Long, walking the value's contents if it's
+ * a List/Map. Only applies if the specified class refers to the Object class.
+ * Otherwise, it leaves the value unchanged.
+ *
+ * @param clazz class of object to be decoded
+ * @param value value to be converted
+ * @return the converted value
+ */
+ private <T> T convertFromDouble(Class<T> clazz, T value) {
+ if (clazz != Object.class) {
+ return value;
+ }
+
+ return clazz.cast(DoubleConverter.convertFromDouble(value));
}
/**
.hasCause(ioe);
}
+ @Test
+ public void testConvertFromDouble() throws Exception {
+ String text = "[listA, {keyA=100}, 200]";
+ assertEquals(text, coder.decode(text, Object.class).toString());
+
+ text = "{keyB=200}";
+ assertEquals(text, coder.decode(text, Object.class).toString());
+ }
+
@Test
public void testToStandard() throws Exception {
MyObject obj = new MyObject();
Code Review / policy / common.git / commitdiff