1 /* 2 * Copyright 2022 Google LLC 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 com.google.android.libraries.mobiledatadownload.file.openers; 17 18 import com.google.android.libraries.mobiledatadownload.file.OpenContext; 19 import com.google.android.libraries.mobiledatadownload.file.Opener; 20 import com.google.android.libraries.mobiledatadownload.file.common.internal.Charsets; 21 import com.google.errorprone.annotations.CanIgnoreReturnValue; 22 import java.io.IOException; 23 import java.nio.charset.Charset; 24 25 /** An opener that reads entire contents of file into a String. */ 26 public final class ReadStringOpener implements Opener<String> { 27 private Charset charset = Charsets.UTF_8; 28 ReadStringOpener()29 protected ReadStringOpener() {} 30 create()31 public static ReadStringOpener create() { 32 return new ReadStringOpener(); 33 } 34 35 @CanIgnoreReturnValue withCharset(Charset charset)36 public ReadStringOpener withCharset(Charset charset) { 37 this.charset = charset; 38 return this; 39 } 40 41 @Override open(OpenContext openContext)42 public String open(OpenContext openContext) throws IOException { 43 byte[] bytes = ReadByteArrayOpener.create().open(openContext); 44 return new String(bytes, charset); 45 } 46 } 47