| /* |
| * Copyright 2010 Google 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.google.web.bindery.autobean.shared; |
| |
| import com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl; |
| import com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl.EncodeState; |
| import com.google.web.bindery.autobean.shared.impl.StringQuoter; |
| |
| /** |
| * Utility methods for encoding an AutoBean graph into a JSON-compatible string. |
| * This codex intentionally does not preserve object identity, nor does it |
| * encode cycles, but it will detect them. |
| */ |
| public class AutoBeanCodex { |
| |
| /** |
| * Decode an AutoBeanCodex payload. |
| * |
| * @param <T> the expected return type |
| * @param factory an AutoBeanFactory capable of producing {@code AutoBean<T>} |
| * @param clazz the expected return type |
| * @param data a payload previously generated by {@link #encode(AutoBean)} |
| * @return an AutoBean containing the payload contents |
| */ |
| public static <T> AutoBean<T> decode(AutoBeanFactory factory, Class<T> clazz, Splittable data) { |
| return AutoBeanCodexImpl.doDecode(EncodeState.forDecode(factory), clazz, data); |
| } |
| |
| /** |
| * Decode an AutoBeanCodex payload. |
| * |
| * @param <T> the expected return type |
| * @param factory an AutoBeanFactory capable of producing {@code AutoBean<T>} |
| * @param clazz the expected return type |
| * @param payload a payload string previously generated by |
| * {@link #encode(AutoBean)}{@link Splittable#getPayload() |
| * .getPayload()}. |
| * @return an AutoBean containing the payload contents |
| */ |
| public static <T> AutoBean<T> decode(AutoBeanFactory factory, Class<T> clazz, String payload) { |
| Splittable data = StringQuoter.split(payload); |
| return decode(factory, clazz, data); |
| } |
| |
| /** |
| * Copy data from a {@link Splittable} into an AutoBean. Unset values in the |
| * Splittable will not nullify data that already exists in the AutoBean. |
| * |
| * @param data the source data to copy |
| * @param bean the target AutoBean |
| */ |
| public static void decodeInto(Splittable data, AutoBean<?> bean) { |
| AutoBeanCodexImpl.doDecodeInto(EncodeState.forDecode(bean.getFactory()), data, bean); |
| } |
| |
| /** |
| * Encodes an AutoBean. The actual payload contents can be retrieved through |
| * {@link Splittable#getPayload()}. |
| * |
| * @param bean the bean to encode |
| * @return a Splittable that encodes the state of the AutoBean |
| */ |
| public static Splittable encode(AutoBean<?> bean) { |
| if (bean == null) { |
| return Splittable.NULL; |
| } |
| |
| StringBuilder sb = new StringBuilder(); |
| EncodeState state = EncodeState.forEncode(bean.getFactory(), sb); |
| AutoBeanCodexImpl.doEncode(state, bean); |
| return StringQuoter.split(sb.toString()); |
| } |
| } |