diff options
Diffstat (limited to 'appc-common/src/main/java/org/onap/appc/util/ObjectMapper.java')
-rw-r--r-- | appc-common/src/main/java/org/onap/appc/util/ObjectMapper.java | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/appc-common/src/main/java/org/onap/appc/util/ObjectMapper.java b/appc-common/src/main/java/org/onap/appc/util/ObjectMapper.java new file mode 100644 index 000000000..df0b24a78 --- /dev/null +++ b/appc-common/src/main/java/org/onap/appc/util/ObjectMapper.java @@ -0,0 +1,101 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP : APPC + * ================================================================================ + * Copyright (C) 2017 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. + * + * ECOMP is a trademark and service mark of AT&T Intellectual Property. + * ============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()); + } +} |