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Google API Client Library for Java. Supports Java 5 (or higher) desktop (SE) and web (EE), Android, and Google App Engine.

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/*
 * Copyright (c) 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.api.client.googleapis.json;

import com.google.api.client.http.HttpResponse;
import com.google.api.client.json.Json;
import com.google.api.client.json.JsonHttpParser;

import org.codehaus.jackson.JsonToken;

import java.io.IOException;

/**
 * Parses HTTP JSON-C response content into an data class of key/value pairs,
 * assuming the data is wrapped in a {@code "data"} envelope.
 * 

* Sample usage: * *

 * 
 * static void setParser(GoogleTransport transport) {
 *   transport.addParser(new JsonCParser());
 * }
 * 
 * 
* * @since 1.0 * @author Yaniv Inbar */ public final class JsonCParser extends JsonHttpParser { @Override public T parse(HttpResponse response, Class dataClass) throws IOException { return Json.parseAndClose(parserForResponse(response), dataClass, null); } /** * Returns a JSON parser to use for parsing the given HTTP response, skipped * over the {@code "data"} envelope. *

* The parser will be closed if any throwable is thrown. The current token * will be the value of the {@code "data"} key. * * @param response HTTP response * @return JSON parser * @throws IllegalArgumentException if content type is not * {@link Json#CONTENT_TYPE} or if {@code "data"} key is not found * @throws IOException I/O exception */ public static org.codehaus.jackson.JsonParser parserForResponse( HttpResponse response) throws IOException { // check for JSON content type String contentType = response.contentType; if (!contentType.startsWith(Json.CONTENT_TYPE)) { throw new IllegalArgumentException("Wrong content type: expected <" + Json.CONTENT_TYPE + "> but got <" + contentType + ">"); } // parse boolean failed = true; org.codehaus.jackson.JsonParser parser = JsonHttpParser.parserForResponse(response); try { Json.skipToKey(parser, response.isSuccessStatusCode ? "data" : "error"); if (parser.getCurrentToken() == JsonToken.END_OBJECT) { throw new IllegalArgumentException("data key not found"); } failed = false; return parser; } finally { if (failed) { parser.close(); } } } }





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