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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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.appc.util;
import java.lang.reflect.Array;
import java.util.Map;
public class ObjectMapper {
private ObjectMapper() {
}
private static void dispatch(PathContext context, Object obj) {
if (obj == null) {
return;
}
final Class<?> cls = obj.getClass();
if (cls.isPrimitive()
|| String.class.isAssignableFrom(cls)
|| Number.class.isAssignableFrom(cls)
|| Boolean.class.isAssignableFrom(cls)) {
handlePrimitive(context, obj);
} else if (cls.isArray()) {
handleArray(context, obj);
} else if (Map.class.isAssignableFrom(cls)) {
handleMap(context, (Map<?, ?>) obj);
} else if (Iterable.class.isAssignableFrom(cls)) {
handleCollection(context, Iterable.class.cast(obj));
} else {
throw new IllegalArgumentException(obj.getClass().getName());
}
}
public static Map<String, String> map(Object obj) {
PathContext context = new PathContext();
dispatch(context, obj);
return context.entries();
}
private static void handleMap(PathContext context, Map<?, ?> val) {
for (Map.Entry<?, ?> entry : val.entrySet()) {
context.pushToken(entry.getKey().toString());
dispatch(context, entry.getValue());
context.popToken();
}
}
private static void handleCollection(PathContext context, Iterable<?> val) {
int index = 0;
for (Object elem : val) {
handleElement(context, index++, elem);
}
}
private static void handleArray(PathContext context, Object val) {
for (int i = 0, n = Array.getLength(val); i < n; i++) {
handleElement(context, i, Array.get(val, i));
}
}
private static void handleElement(PathContext context, int index, Object val) {
if (val == null) {
return;
}
String modifier = new StringBuilder().append('[').append(Integer.valueOf(index)).append(']').toString();
context.pushModifier(modifier);
dispatch(context, val);
context.popModifier();
}
private static void handlePrimitive(PathContext context, Object val) {
context.entry(context.getPath(), val.toString());
}
}
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