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Java example source code file (UnmodifiableMaps.java)
The UnmodifiableMaps.java Java example source code/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /** * @test * @bug 7128648 * @summary HttpURLConnection.getHeaderFields should return an unmodifiable Map */ import java.io.IOException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.URI; import java.net.HttpURLConnection; import java.util.Collection; import java.util.ArrayList; import java.util.List; import java.util.Map; import com.sun.net.httpserver.HttpExchange; import com.sun.net.httpserver.HttpHandler; import com.sun.net.httpserver.HttpServer; import com.sun.net.httpserver.Headers; public class UnmodifiableMaps { void test(String[] args) throws Exception { HttpServer server = startHttpServer(); try { InetSocketAddress address = server.getAddress(); URI uri = new URI("http://" + InetAddress.getLocalHost().getHostAddress() + ":" + address.getPort() + "/foo"); doClient(uri); } finally { server.stop(0); } } void doClient(URI uri) throws Exception { HttpURLConnection uc = (HttpURLConnection) uri.toURL().openConnection(); // Test1: getRequestProperties is unmodifiable System.out.println("Check getRequestProperties"); checkUnmodifiable(uc.getRequestProperties()); uc.addRequestProperty("X", "V"); uc.addRequestProperty("X1", "V1"); checkUnmodifiable(uc.getRequestProperties()); int resp = uc.getResponseCode(); check(resp == 200, "Unexpected response code. Expected 200, got " + resp); // Test2: getHeaderFields is unmodifiable System.out.println("Check getHeaderFields"); checkUnmodifiable(uc.getHeaderFields()); // If the implementation does caching, check again. checkUnmodifiable(uc.getHeaderFields()); } // HTTP Server HttpServer startHttpServer() throws IOException { HttpServer httpServer = HttpServer.create(new InetSocketAddress(0), 0); httpServer.createContext("/foo", new SimpleHandler()); httpServer.start(); return httpServer; } class SimpleHandler implements HttpHandler { @Override public void handle(HttpExchange t) throws IOException { Headers respHeaders = t.getResponseHeaders(); // ensure some response headers, over the usual ones respHeaders.add("RespHdr1", "Value1"); respHeaders.add("RespHdr2", "Value2"); respHeaders.add("RespHdr3", "Value3"); t.sendResponseHeaders(200, -1); t.close(); } } void checkUnmodifiable(Map<String,List Other Java examples (source code examples)Here is a short list of links related to this Java UnmodifiableMaps.java source code file: |
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