gradle-master/subprojects/core/src/main/java/org/gradle/process/internal/worker/request/RequestSerializer.java
/*
 * Copyright 2019 the original author or authors.
 *
 * 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 org.gradle.process.internal.worker.request;

import org.gradle.internal.operations.BuildOperationRef;
import org.gradle.internal.operations.DefaultBuildOperationRef;
import org.gradle.internal.operations.OperationIdentifier;
import org.gradle.internal.serialize.Decoder;
import org.gradle.internal.serialize.Encoder;
import org.gradle.internal.serialize.Serializer;

public class RequestSerializer implements Serializer<Request> {
    private final Serializer<Object> argSerializer;
    private final boolean skipIncomingArg;

    public RequestSerializer(Serializer<Object> argSerializer, boolean skipIncomingArg) {
        this.argSerializer = argSerializer;
        this.skipIncomingArg = skipIncomingArg;
    }

    @Override
    public void write(Encoder encoder, Request request) throws Exception {
        encoder.encodeChunked(target -> {
            Object object = request.getArg();
            argSerializer.write(target, object);
        });

        encoder.writeLong(request.getBuildOperation().getId().getId());
        OperationIdentifier parentId = request.getBuildOperation().getParentId();
        if (parentId != null) {
            encoder.writeBoolean(true);
            encoder.writeLong(parentId.getId());
        } else {
            encoder.writeBoolean(false);
        }
    }

    @Override
    public Request read(Decoder decoder) throws Exception {
        Object arg;
        if (skipIncomingArg) {
            decoder.skipChunked();
            arg = null;
        } else {
            arg = decoder.decodeChunked(argSerializer::read);
        }

        OperationIdentifier id = new OperationIdentifier(decoder.readLong());
        BuildOperationRef buildOperation;
        if (decoder.readBoolean()) {
            buildOperation = new DefaultBuildOperationRef(id, new OperationIdentifier(decoder.readLong()));
        } else {
            buildOperation = new DefaultBuildOperationRef(id, null);
        }

        return new Request(arg, buildOperation);
    }

}
