jsonb/src/main/java/org/eclipse/persistence/json/bind/internal/serializer/AbstractArraySerializer.java

/*******************************************************************************
 * Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 * Roman Grigoriadi
 ******************************************************************************/

package org.eclipse.persistence.json.bind.internal.serializer;

import org.eclipse.persistence.json.bind.internal.AbstractContainerSerializer;
import org.eclipse.persistence.json.bind.internal.ReflectionUtils;
import org.eclipse.persistence.json.bind.internal.unmarshaller.ContainerModel;
import org.eclipse.persistence.json.bind.internal.unmarshaller.EmbeddedItem;
import org.eclipse.persistence.json.bind.model.JsonBindingModel;
import org.eclipse.persistence.json.bind.model.JsonContext;

import javax.json.stream.JsonGenerator;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * Common serializer for arrays.
 *
 * @author Roman Grigoriadi
 */
public abstract class AbstractArraySerializer<T> extends AbstractContainerSerializer<T> implements EmbeddedItem {

    protected final JsonBindingModel containerModel;

    protected final Type arrayValType;

    protected AbstractArraySerializer(SerializerBuilder builder) {
        super(builder);
        arrayValType = resolveArrayType();
        containerModel = new ContainerModel(arrayValType, resolveContainerModelCustomization(arrayValType, builder.getJsonbContext()),
                JsonContext.JSON_ARRAY);
    }

    private Type resolveArrayType() {
        if (getRuntimeType() == null || getRuntimeType() == Object.class) {
            return Object.class;
        } else if (getRuntimeType() instanceof ParameterizedType) {
            return ReflectionUtils.resolveType(this, ((ParameterizedType) getRuntimeType()).getActualTypeArguments()[0]);
        } else if (getRuntimeType() instanceof GenericArrayType) {
            return ReflectionUtils.resolveRawType(this, ((GenericArrayType) getRuntimeType()).getGenericComponentType());
        } else {
            return ReflectionUtils.getRawType(getRuntimeType()).getComponentType();
        }
    }


    @Override
    protected void writeStart(JsonGenerator generator) {
        generator.writeStartArray();
    }

    @Override
    protected void writeStart(String key, JsonGenerator generator) {
        generator.writeStartArray(key);
    }
}