org.mule.runtime.extension.api.persistence.metadata.AbstractMetadataResultJsonSerializer.java Source code

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Here is the source code for org.mule.runtime.extension.api.persistence.metadata.AbstractMetadataResultJsonSerializer.java

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/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.runtime.extension.api.persistence.metadata;

import org.mule.metadata.api.model.MetadataType;
import org.mule.metadata.persistence.MetadataTypeGsonTypeAdapter;
import org.mule.metadata.persistence.type.adapter.OptionalTypeAdapterFactory;
import org.mule.runtime.api.meta.model.OutputModel;
import org.mule.runtime.api.meta.model.error.ErrorModel;
import org.mule.runtime.api.meta.model.error.ImmutableErrorModel;
import org.mule.runtime.api.meta.model.operation.OperationModel;
import org.mule.runtime.api.meta.model.parameter.ExclusiveParametersModel;
import org.mule.runtime.api.meta.model.parameter.ParameterGroupModel;
import org.mule.runtime.api.meta.model.parameter.ParameterModel;
import org.mule.runtime.api.meta.model.source.SourceCallbackModel;
import org.mule.runtime.api.meta.model.source.SourceModel;
import org.mule.runtime.api.metadata.MetadataKey;
import org.mule.runtime.api.metadata.resolving.MetadataResult;
import org.mule.runtime.extension.api.model.ImmutableOutputModel;
import org.mule.runtime.extension.api.model.operation.ImmutableOperationModel;
import org.mule.runtime.extension.api.model.parameter.ImmutableExclusiveParametersModel;
import org.mule.runtime.extension.api.model.parameter.ImmutableParameterGroupModel;
import org.mule.runtime.extension.api.model.parameter.ImmutableParameterModel;
import org.mule.runtime.extension.api.model.source.ImmutableSourceCallbackModel;
import org.mule.runtime.extension.api.model.source.ImmutableSourceModel;
import org.mule.runtime.extension.internal.persistence.DefaultImplementationTypeAdapterFactory;
import org.mule.runtime.extension.internal.persistence.ModelPropertyMapTypeAdapterFactory;
import org.mule.runtime.extension.internal.persistence.metadata.ComponentResultTypeAdapterFactory;
import org.mule.runtime.extension.internal.persistence.metadata.FailureCodeTypeAdapterFactory;
import org.mule.runtime.extension.internal.persistence.metadata.MetadataKeyTypeAdapter;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

/**
 * Abstract implementation of a serializer that can convert a {@link MetadataResult} of some payload type into a readable and
 * processable JSON representation and from a JSON {@link String} to an {@link MetadataResult} instance
 *
 * @since 1.0
 */
abstract class AbstractMetadataResultJsonSerializer<T> {

    protected final Gson gson;

    AbstractMetadataResultJsonSerializer(boolean prettyPrint) {

        final DefaultImplementationTypeAdapterFactory operationModelTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                OperationModel.class, ImmutableOperationModel.class);
        final DefaultImplementationTypeAdapterFactory sourceModelTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                SourceModel.class, ImmutableSourceModel.class);
        final DefaultImplementationTypeAdapterFactory sourceCallbackModelTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                SourceCallbackModel.class, ImmutableSourceCallbackModel.class);
        final DefaultImplementationTypeAdapterFactory parameterModelTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                ParameterModel.class, ImmutableParameterModel.class);
        final DefaultImplementationTypeAdapterFactory parameterGroupModelTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                ParameterGroupModel.class, ImmutableParameterGroupModel.class);
        final DefaultImplementationTypeAdapterFactory exclusiveParametersTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                ExclusiveParametersModel.class, ImmutableExclusiveParametersModel.class);
        final DefaultImplementationTypeAdapterFactory outputModelTypeAdapterFactory = new DefaultImplementationTypeAdapterFactory<>(
                OutputModel.class, ImmutableOutputModel.class);
        final DefaultImplementationTypeAdapterFactory<ErrorModel, ImmutableErrorModel> errorModelTypeAdapter = new DefaultImplementationTypeAdapterFactory<>(
                ErrorModel.class, ImmutableErrorModel.class);

        final GsonBuilder gsonBuilder = new GsonBuilder()
                .registerTypeAdapterFactory(new FailureCodeTypeAdapterFactory())
                .registerTypeAdapter(MetadataType.class, new MetadataTypeGsonTypeAdapter())
                .registerTypeAdapterFactory(new OptionalTypeAdapterFactory())
                .registerTypeAdapterFactory(new ModelPropertyMapTypeAdapterFactory())
                .registerTypeAdapterFactory(new ComponentResultTypeAdapterFactory())
                .registerTypeAdapter(MetadataKey.class, new MetadataKeyTypeAdapter())
                .registerTypeAdapterFactory(sourceModelTypeAdapterFactory)
                .registerTypeAdapterFactory(sourceCallbackModelTypeAdapterFactory)
                .registerTypeAdapterFactory(parameterModelTypeAdapterFactory)
                .registerTypeAdapterFactory(parameterGroupModelTypeAdapterFactory)
                .registerTypeAdapterFactory(exclusiveParametersTypeAdapterFactory)
                .registerTypeAdapterFactory(operationModelTypeAdapterFactory)
                .registerTypeAdapterFactory(outputModelTypeAdapterFactory)
                .registerTypeAdapterFactory(errorModelTypeAdapter);

        if (prettyPrint) {
            gsonBuilder.setPrettyPrinting();
        }

        this.gson = gsonBuilder.create();
    }

    /**
     * @param result the {@link MetadataResult} to be serialized
     * @return {@link String} JSON representation of the {@link MetadataResult}
     */
    public abstract String serialize(MetadataResult<T> result);

    /**
     * Deserializes a JSON representation of an {@link MetadataResult}, to an actual instance of it.
     *
     * @param result the serialized {@link MetadataResult} in a {@link String} JSON representation
     * @return an instance of {@link MetadataResult} based on the serialized JSON
     */
    public abstract MetadataResult<T> deserialize(String result);
}