1 /* 2 * Copyright (C) 2010 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 17 package libcore.util; 18 19 import static android.annotation.SystemApi.Client.MODULE_LIBRARIES; 20 21 import android.annotation.SystemApi; 22 import android.compat.annotation.UnsupportedAppUsage; 23 import dalvik.annotation.compat.VersionCodes; 24 25 /** 26 * Empty array is immutable. Use a shared empty array to avoid allocation. 27 * 28 * @hide 29 */ 30 @SystemApi(client = MODULE_LIBRARIES) 31 public final class EmptyArray { EmptyArray()32 private EmptyArray() {} 33 34 /** @hide */ 35 @SystemApi(client = MODULE_LIBRARIES) 36 public static final @NonNull boolean[] BOOLEAN = new boolean[0]; 37 38 /** @hide */ 39 @UnsupportedAppUsage(maxTargetSdk=VersionCodes.Q, 40 publicAlternatives="Use {@code new byte[0]} instead.") 41 @SystemApi(client = MODULE_LIBRARIES) 42 public static final @NonNull byte[] BYTE = new byte[0]; 43 44 /** @hide */ 45 public static final char[] CHAR = new char[0]; 46 47 /** @hide */ 48 public static final double[] DOUBLE = new double[0]; 49 50 /** @hide */ 51 @SystemApi(client = MODULE_LIBRARIES) 52 public static final @NonNull float[] FLOAT = new float[0]; 53 54 /** @hide */ 55 @UnsupportedAppUsage(maxTargetSdk=VersionCodes.Q, 56 publicAlternatives="Use {@code new int[0]} instead.") 57 @SystemApi(client = MODULE_LIBRARIES) 58 public static final @NonNull int[] INT = new int[0]; 59 60 /** @hide */ 61 @UnsupportedAppUsage(maxTargetSdk=VersionCodes.Q, 62 publicAlternatives="Use {@code new long[0]} instead.") 63 @SystemApi(client = MODULE_LIBRARIES) 64 public static final @NonNull long[] LONG = new long[0]; 65 66 /** @hide */ 67 public static final Class<?>[] CLASS = new Class[0]; 68 69 /** @hide */ 70 @UnsupportedAppUsage(maxTargetSdk=VersionCodes.Q, 71 publicAlternatives="Use {@code new Object[0]} instead.") 72 @SystemApi(client = MODULE_LIBRARIES) 73 public static final @NonNull Object[] OBJECT = new Object[0]; 74 75 /** @hide */ 76 @SystemApi(client = MODULE_LIBRARIES) 77 public static final @NonNull String[] STRING = new String[0]; 78 79 /** @hide */ 80 public static final Throwable[] THROWABLE = new Throwable[0]; 81 82 /** @hide */ 83 public static final StackTraceElement[] STACK_TRACE_ELEMENT = new StackTraceElement[0]; 84 85 /** @hide */ 86 public static final java.lang.reflect.Type[] TYPE = new java.lang.reflect.Type[0]; 87 88 /** @hide */ 89 public static final java.lang.reflect.TypeVariable[] TYPE_VARIABLE = 90 new java.lang.reflect.TypeVariable[0]; 91 } 92