com.google.api.client.googleapis.json.JsonFeedParser Maven / Gradle / Ivy
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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.JsonFactory;
import com.google.api.client.json.JsonParser;
import java.io.IOException;
/**
* Google JSON-C feed parser when the item class is known in advance.
*
* @since 1.0
* @author Yaniv Inbar
*/
public final class JsonFeedParser extends AbstractJsonFeedParser {
private final Class itemClass;
/**
* @param parser JSON parser
* @param feedClass feed class
* @param itemClass item class
*/
public JsonFeedParser(JsonParser parser, Class feedClass, Class itemClass) {
super(parser, feedClass);
this.itemClass = itemClass;
}
@SuppressWarnings("unchecked")
@Override
public I parseNextItem() throws IOException {
return (I) super.parseNextItem();
}
@Override
Object parseItemInternal() throws IOException {
return parser.parse(itemClass, null);
}
/**
* Parses the given HTTP response using the given feed class and item class.
*
* @param jsonFactory JSON factory
* @param response HTTP response
* @param feedClass feed class
* @param itemClass item class
* @since 1.3
*/
public static JsonFeedParser use(
JsonFactory jsonFactory, HttpResponse response, Class feedClass, Class itemClass)
throws IOException {
JsonParser parser = JsonCParser.parserForResponse(jsonFactory, response);
return new JsonFeedParser(parser, feedClass, itemClass);
}
}