# MappingEase.java

    package org.codefilarete.stalactite.dsl;

    import org.codefilarete.stalactite.dsl.embeddable.FluentEmbeddableMappingBuilder;
    import org.codefilarete.stalactite.dsl.entity.FluentEntityMappingBuilder;
    import org.codefilarete.stalactite.dsl.key.CompositeKeyMappingConfigurationProvider;
    import org.codefilarete.stalactite.dsl.key.FluentCompositeKeyMappingBuilder;
    import org.codefilarete.stalactite.dsl.subentity.FluentSubEntityMappingBuilder;
    import org.codefilarete.stalactite.dsl.subentity.SubEntityMappingConfiguration;
    import org.codefilarete.stalactite.dsl.subentity.SubEntityMappingConfigurationProvider;
    import org.codefilarete.stalactite.engine.configurer.FluentCompositeKeyMappingConfigurationSupport;
    import org.codefilarete.stalactite.engine.configurer.embeddable.FluentEmbeddableMappingConfigurationSupport;
    import org.codefilarete.stalactite.engine.configurer.entity.FluentEntityMappingConfigurationSupport;
    import org.codefilarete.stalactite.engine.configurer.FluentSubEntityMappingConfigurationSupport;
    import org.codefilarete.stalactite.mapping.EmbeddedClassMapping;
    import org.danekja.java.util.function.serializable.SerializableFunction;

    /**
     * Declares a simple entry point to start configuring a persistence mapping.
     *
     * @author Guillaume Mary
     */
    public final class MappingEase {

    	/**
    	 * Starts a {@link FluentEntityMappingBuilder} for a given class.
    	 *
    	 * @param classToPersist the class to be persisted
    	 * @param identifierType entity identifier type
    	 * @param <T> any type to be persisted
    	 * @param <I> the type of the identifier
    	 * @return a new {@link FluentEntityMappingBuilder}
    	 */
    	@SuppressWarnings("squid:S1172")	// identifierType is used to sign result
    	public static <T, I> FluentEntityMappingBuilder<T, I> entityBuilder(Class<T> classToPersist, Class<I> identifierType) {
    		// Note that we don't use identifierType, but it's necessary to generic type of returned instance
    		return new FluentEntityMappingConfigurationSupport<>(classToPersist);
    	}

    	/**
    	 * Starts a {@link FluentSubEntityMappingBuilder} for a given class.
    	 *
    	 * @param classToPersist the class to be persisted
    	 * @param <T> any type to be persisted
    	 * @param <I> the type of the identifier
    	 * @return a new {@link FluentSubEntityMappingBuilder}
    	 * @see PolymorphismPolicy.TablePerClassPolymorphism#addSubClass(SubEntityMappingConfigurationProvider)
    	 * @see PolymorphismPolicy.JoinTablePolymorphism#addSubClass(SubEntityMappingConfigurationProvider)
    	 * @see PolymorphismPolicy.SingleTablePolymorphism#addSubClass(SubEntityMappingConfiguration, Object)
    	 */
    	public static <T, I> FluentSubEntityMappingBuilder<T, Object> subentityBuilder(Class<T> classToPersist) {
    		return new FluentSubEntityMappingConfigurationSupport<>(classToPersist);
    	}

    	/**
    	 * Starts a {@link FluentSubEntityMappingBuilder} for a given class.
    	 *
    	 * @param classToPersist the class to be persisted
    	 * @param identifierType entity identifier type
    	 * @param <T> any type to be persisted
    	 * @param <I> the type of the identifier
    	 * @return a new {@link FluentSubEntityMappingBuilder}
    	 * @see PolymorphismPolicy.TablePerClassPolymorphism#addSubClass(SubEntityMappingConfigurationProvider)
    	 * @see PolymorphismPolicy.JoinTablePolymorphism#addSubClass(SubEntityMappingConfigurationProvider)
    	 * @see PolymorphismPolicy.SingleTablePolymorphism#addSubClass(SubEntityMappingConfiguration, Object)
    	 */
    	public static <T, I> FluentSubEntityMappingBuilder<T, I> subentityBuilder(Class<T> classToPersist, Class<I> identifierType) {
    		// Note that we don't use identifierType, but it's necessary to generic type of returned instance
    		return new FluentSubEntityMappingConfigurationSupport<>(classToPersist);
    	}

    	/**
    	 * Starts a {@link FluentEmbeddableMappingBuilder} for a given class.
    	 *
    	 * @param persistedClass the class to be persisted by the {@link EmbeddedClassMapping}
    	 * @param <T> any type to be persisted
    	 * @return a new {@link FluentEmbeddableMappingBuilder}
    	 */
    	public static <T> FluentEmbeddableMappingBuilder<T> embeddableBuilder(Class<T> persistedClass) {
    		return new FluentEmbeddableMappingConfigurationSupport<>(persistedClass);
    	}

    	/**
    	 * Starts a {@link FluentCompositeKeyMappingBuilder} for a given class.
    	 * To be used with {@link FluentEntityMappingBuilder#mapCompositeKey(SerializableFunction, CompositeKeyMappingConfigurationProvider, java.util.function.Consumer, java.util.function.Function)}
    	 *
    	 * @param persistedClass the class to be persisted by the {@link EmbeddedClassMapping}
    	 * @param <T> any type to be persisted
    	 * @return a new {@link FluentEmbeddableMappingBuilder}
    	 */
    	public static <T> FluentCompositeKeyMappingBuilder<T> compositeKeyBuilder(Class<T> persistedClass) {
    		return new FluentCompositeKeyMappingConfigurationSupport<>(persistedClass);
    	}

    	private MappingEase() {
    		// tool class
    	}
    }