/** * Copyright 2013 Turn, Inc. * * 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.turn.shapeshifter; import com.fasterxml.jackson.databind.JsonNode; import com.turn.shapeshifter.ShapeshifterProtos.JsonType; /** * Static utilities pertaining to {@link Transformer} instances. * * @author jsilland */ public final class Transformers { private Transformers() { } private static class NullFormatTransformer implements FormatTransformer { private final Transformer transformer; private NullFormatTransformer(Transformer transformer) { this.transformer = transformer; } /** * {@inheritDoc} */ @Override public JsonType getJsonType() { return transformer.getJsonType(); } /** * {@inheritDoc} */ @Override public JsonNode serialize(Object value) { return transformer.serialize(value); } /** * {@inheritDoc} */ @Override public Object parse(JsonNode node) { return transformer.parse(node); } /** * {@inheritDoc} */ @Override public String getExternalFormat() { return null; } } /** * Returns a new formatting transformer that delegates to a simple * transformer but returns {@code null} for the format value. * * @param transformer the transformer to wrap */ public static FormatTransformer format(Transformer transformer) { return new NullFormatTransformer(transformer); } }