io.grpc.InternalMetadata Maven / Gradle / Ivy
/*
* Copyright 2016, gRPC Authors All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.grpc;
import io.grpc.Metadata.AsciiMarshaller;
import io.grpc.Metadata.Key;
import java.nio.charset.Charset;
/**
* Internal {@link Metadata} accessor. This is intended for use by io.grpc.internal, and the
* specifically supported transport packages. If you *really* think you need to use this, contact
* the gRPC team first.
*/
@Internal
public final class InternalMetadata {
/**
* A specialized plain ASCII marshaller. Both input and output are assumed to be valid header
* ASCII.
*
* Extended here to break the dependency.
*/
@Internal
public interface TrustedAsciiMarshaller extends Metadata.TrustedAsciiMarshaller {}
/**
* Copy of StandardCharsets, which is only available on Java 1.7 and above.
*/
@Internal
public static final Charset US_ASCII = Charset.forName("US-ASCII");
@Internal
public static Key keyOf(String name, TrustedAsciiMarshaller marshaller) {
boolean isPseudo = name != null && !name.isEmpty() && name.charAt(0) == ':';
return Metadata.Key.of(name, isPseudo, marshaller);
}
@Internal
public static Key keyOf(String name, AsciiMarshaller marshaller) {
boolean isPseudo = name != null && !name.isEmpty() && name.charAt(0) == ':';
return Metadata.Key.of(name, isPseudo, marshaller);
}
@Internal
public static Metadata newMetadata(byte[]... binaryValues) {
return new Metadata(binaryValues);
}
@Internal
public static Metadata newMetadata(int usedNames, byte[]... binaryValues) {
return new Metadata(usedNames, binaryValues);
}
@Internal
public static byte[][] serialize(Metadata md) {
return md.serialize();
}
@Internal
public static int headerCount(Metadata md) {
return md.headerCount();
}
}