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The AWS SDK for Java - Core module holds the classes that are used by the individual service clients to interact with Amazon Web Services. Users need to depend on aws-java-sdk artifact for accessing individual client classes.

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/*
 * Copyright 2011-2024 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.protocol.json.internal;

import com.amazonaws.Request;
import com.amazonaws.annotation.SdkInternalApi;
import com.amazonaws.protocol.MarshallingInfo;
import com.amazonaws.protocol.MarshallingType;
import com.amazonaws.protocol.json.StructuredJsonGenerator;
import com.amazonaws.protocol.MarshallLocation;
import com.amazonaws.protocol.ProtocolMarshaller;

/**
 * Dependencies needed by implementations of {@link JsonMarshaller}.
 */
@SdkInternalApi
public class JsonMarshallerContext {

    private final StructuredJsonGenerator jsonGenerator;
    private final JsonProtocolMarshaller protocolHandler;
    private final MarshallerRegistry marshallerRegistry;
    private final Request request;
    private final EmptyBodyJsonMarshaller emptyBodyMarshaller;

    private JsonMarshallerContext(Builder builder) {
        this.jsonGenerator = builder.jsonGenerator;
        this.protocolHandler = builder.protocolHandler;
        this.marshallerRegistry = builder.marshallerRegistry;
        this.request = builder.request;
        this.emptyBodyMarshaller = builder.emptyBodyMarshaller != null ? builder.emptyBodyMarshaller :
                                   EmptyBodyJsonMarshaller.EMPTY;
    }

    /**
     * @return StructuredJsonGenerator used to produce the JSON document for a request.
     */
    public StructuredJsonGenerator jsonGenerator() {
        return jsonGenerator;
    }

    /**
     * @return Implementation of {@link ProtocolMarshaller} that can be used to call back out to marshall structured data (i.e.
     * lists of objects).
     */
    public ProtocolMarshaller protocolHandler() {
        return protocolHandler;
    }

    /**
     * @return Marshaller registry to obtain marshaller implementations for nested types (i.e. lists of objects or maps of string
     * to string).
     */
    public MarshallerRegistry marshallerRegistry() {
        return marshallerRegistry;
    }

    /**
     * @return Mutable {@link Request} object that can be used to add headers, query params, modify request URI, etc.
     */
    public Request request() {
        return request;
    }

    public EmptyBodyJsonMarshaller emptyBodyJsonMarshaller() {
        return emptyBodyMarshaller;
    }

    /**
     * Convenience method to marshall a nested object (may be simple or structured) at the given location.
     *
     * @param marshallLocation Current {@link MarshallLocation}
     * @param val              Value to marshall.
     */
    public void marshall(MarshallLocation marshallLocation, Object val) {
        marshallerRegistry().getMarshaller(marshallLocation, val).marshall(val, this, null);
    }

    /**
     * Convenience method to marshall a nested object (may be simple or structured) at the given location.
     *
     * @param marshallLocation Current {@link MarshallLocation}
     * @param val              Value to marshall.
     * @param marshallingInfo        Name of parameter to marshall.
     */
    public void marshall(MarshallLocation marshallLocation, Object val, MarshallingInfo marshallingInfo) {
        marshallerRegistry().getMarshaller(marshallLocation, val).marshall(val, this, marshallingInfo);
    }

    public void marshall(MarshallLocation marshallLocation, Object val, String paramName) {
        marshallerRegistry().getMarshaller(marshallLocation, val)
                            // construct a new MarshallingInfo to pass the marshallLocationName
                            .marshall(val, this, MarshallingInfo.builder(new MarshallingType