1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package libcore.java.nio.charset; 17 18 import java.nio.charset.Charset; 19 import java.nio.charset.spi.CharsetProvider; 20 import java.util.Collections; 21 import java.util.Iterator; 22 23 /** 24 * This class is registered as a charset provider by the META-INF in the libcore 25 * tests jar. Since there isn't any convenient API to dynamically register and de-register 26 * charset-providers, this class allows tests to plug in a delegate that lives for the 27 * duration of the test. 28 */ 29 public final class SettableCharsetProvider extends CharsetProvider { 30 private static CharsetProvider delegate; 31 setDelegate(CharsetProvider cp)32 public static void setDelegate(CharsetProvider cp) { 33 delegate = cp; 34 } 35 clearDelegate()36 public static void clearDelegate() { 37 delegate = null; 38 } 39 40 @Override charsets()41 public Iterator<Charset> charsets() { 42 if (delegate != null) { 43 return delegate.charsets(); 44 } 45 46 return Collections.emptyIterator(); 47 } 48 49 @Override charsetForName(String charsetName)50 public Charset charsetForName(String charsetName) { 51 if (delegate != null) { 52 return delegate.charsetForName(charsetName); 53 } 54 55 return null; 56 } 57 } 58