foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/mappings/TypedAssociation.java

/*
 * Copyright (c) 1998, 2021 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 v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.mappings;


/**
 * <p><b>Purpose</b>: Generic association object.
 * This can be used to map hashtable/map containers where the key and value are non-typed primitives.
 *
 * @author James Sutherland
 * @since TOPLink/Java 3.0
 */
public class TypedAssociation extends Association {
    protected Class<?> keyType;
    protected Class<?> valueType;

    /**
     * Default constructor.
     */
    public TypedAssociation() {
        super();
    }

    /**
     * PUBLIC:
     * Create an association.
     */
    public TypedAssociation(Object key, Object value) {
        super(key, value);
        if (key != null) {
            this.keyType = key.getClass();
        }
        this.value = value;
        if (value != null) {
            this.valueType = value.getClass();
        }
    }

    /**
     * PUBLIC:
     * Return the class of the key.
     */
    public Class<?> getKeyType() {
        return keyType;
    }

    /**
     * PUBLIC:
     * Return the class of the value.
     */
    public Class<?> getValueType() {
        return valueType;
    }

    /**
     * INTERNAL:
     * Handler for the descriptor post build event.
     * Convert the key and values to their appropriate type.
     */
    public void postBuild(org.eclipse.persistence.descriptors.DescriptorEvent event) {
        setKey(event.getSession().getDatasourceLogin().getDatasourcePlatform().getConversionManager().convertObject(getKey(), getKeyType()));
        setValue(event.getSession().getDatasourceLogin().getDatasourcePlatform().getConversionManager().convertObject(getValue(), getValueType()));
    }

    /**
     * PUBLIC:
     * Set the class of the key.
     */
    public void setKeyType(Class<?> keyType) {
        this.keyType = keyType;
    }

    /**
     * PUBLIC:
     * Set the class of the value.
     */
    public void setValueType(Class<?> valueType) {
        this.valueType = valueType;
    }
}