Portable String <--> bytes conversion (#841)

src/main/java/com/google/api/generator/gapic/protoparser/BatchingSettingsConfigParser.java

@@ -20,6 +20,7 @@
 import com.google.common.base.Strings;
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.ArrayList;
@@ -69,7 +70,9 @@ static Optional<List<GapicBatchingSettings>> parse(String gapicYamlConfigFilePat
     String fileContents = null;
 
     try {
-      fileContents = new String(Files.readAllBytes(Paths.get(gapicYamlConfigFilePath)));
+      fileContents =
+          new String(
+              Files.readAllBytes(Paths.get(gapicYamlConfigFilePath)), StandardCharsets.UTF_8);
     } catch (IOException e) {
       return Optional.empty();
     }
@@ -104,7 +107,7 @@ private static Optional<List<GapicBatchingSettings>> parseFromMap(Map<String, Ob
             batchingOuterYamlConfig.containsKey(YAML_KEY_DESCRIPTOR),
             String.format(
                 "%s key expected but not found for method %s",
-                YAML_KEY_DESCRIPTOR, (String) methodYamlConfig.get(YAML_KEY_NAME)));
+                YAML_KEY_DESCRIPTOR, methodYamlConfig.get(YAML_KEY_NAME)));
 
         // Parse the threshold values first.
         Map<String, Object> batchingYamlConfig =

src/main/java/com/google/api/generator/gapic/protoparser/GapicLanguageSettingsParser.java

@@ -19,6 +19,7 @@
 import com.google.common.base.Strings;
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.Map;
@@ -48,7 +49,9 @@ static Optional<GapicLanguageSettings> parse(String gapicYamlConfigFilePath) {
     String fileContents = null;
 
     try {
-      fileContents = new String(Files.readAllBytes(Paths.get(gapicYamlConfigFilePath)));
+      fileContents =
+          new String(
+              Files.readAllBytes(Paths.get(gapicYamlConfigFilePath)), StandardCharsets.UTF_8);
     } catch (IOException e) {
       return Optional.empty();
     }

src/main/java/com/google/api/generator/gapic/protoparser/GapicLroRetrySettingsParser.java

@@ -19,6 +19,7 @@
 import com.google.common.base.Strings;
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.ArrayList;
@@ -56,7 +57,9 @@ static Optional<List<GapicLroRetrySettings>> parse(String gapicYamlConfigFilePat
     String fileContents = null;
 
     try {
-      fileContents = new String(Files.readAllBytes(Paths.get(gapicYamlConfigFilePath)));
+      fileContents =
+          new String(
+              Files.readAllBytes(Paths.get(gapicYamlConfigFilePath)), StandardCharsets.UTF_8);
     } catch (IOException e) {
       return Optional.empty();
     }

src/main/java/com/google/api/generator/gapic/protoparser/ServiceYamlParser.java

@@ -21,6 +21,7 @@
 import com.google.protobuf.util.JsonFormat;
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.LinkedHashMap;
@@ -37,7 +38,8 @@ public static Optional<com.google.api.Service> parse(String serviceYamlFilePath)
 
     String fileContents = null;
     try {
-      fileContents = new String(Files.readAllBytes(Paths.get(serviceYamlFilePath)));
+      fileContents =
+          new String(Files.readAllBytes(Paths.get(serviceYamlFilePath)), StandardCharsets.UTF_8);
     } catch (IOException e) {
       return Optional.empty();
     }

src/main/java/com/google/api/generator/gapic/protowriter/Writer.java

@@ -24,6 +24,7 @@
 import com.google.protobuf.compiler.PluginProtos.CodeGeneratorResponse;
 import com.google.protobuf.util.JsonFormat;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.jar.JarEntry;
 import java.util.jar.JarOutputStream;
@@ -61,7 +62,7 @@ public static CodeGeneratorResponse write(
       JarEntry jarEntry = new JarEntry(String.format("%s/%s.java", path, className));
       try {
         jos.putNextEntry(jarEntry);
-        jos.write(code.getBytes());
+        jos.write(code.getBytes(StandardCharsets.UTF_8));
       } catch (IOException e) {
         throw new GapicWriterException(
             String.format(
@@ -80,7 +81,7 @@ public static CodeGeneratorResponse write(
     JarEntry jarEntry = new JarEntry(String.format("%s/package-info.java", path));
     try {
       jos.putNextEntry(jarEntry);
-      jos.write(code.getBytes());
+      jos.write(code.getBytes(StandardCharsets.UTF_8));
     } catch (IOException e) {
       throw new GapicWriterException("Could not write code for package-info.java");
     }
@@ -90,7 +91,8 @@ public static CodeGeneratorResponse write(
       jarEntry = new JarEntry(String.format("%s/gapic_metadata.json", path));
       try {
         jos.putNextEntry(jarEntry);
-        jos.write(JsonFormat.printer().print(context.gapicMetadata()).getBytes());
+        jos.write(
+            JsonFormat.printer().print(context.gapicMetadata()).getBytes(StandardCharsets.UTF_8));
       } catch (IOException e) {
         throw new GapicWriterException("Could not write gapic_metadata.json");
       }