# EmbeddableMappingConfiguration.java

    package org.codefilarete.stalactite.engine.configurer.builder.embeddable;

    import java.lang.reflect.Method;
    import java.util.Collection;
    import java.util.List;
    import java.util.NoSuchElementException;
    import javax.annotation.Nullable;

    import org.codefilarete.reflection.Accessor;
    import org.codefilarete.reflection.PropertyAccessor;
    import org.codefilarete.reflection.ReversibleAccessor;
    import org.codefilarete.reflection.ValueAccessPointMap;
    import org.codefilarete.reflection.ValueAccessPointSet;
    import org.codefilarete.stalactite.dsl.embeddable.EmbeddableMappingConfiguration.Linkage;
    import org.codefilarete.stalactite.dsl.key.CompositeKeyMappingConfiguration;
    import org.codefilarete.stalactite.dsl.naming.UniqueConstraintNamingStrategy;
    import org.codefilarete.stalactite.sql.ddl.Size;
    import org.codefilarete.stalactite.sql.ddl.structure.Column;
    import org.codefilarete.stalactite.sql.statement.binder.ParameterBinder;
    import org.codefilarete.stalactite.sql.statement.binder.ParameterBinderRegistry.EnumBindType;
    import org.codefilarete.tool.collection.Iterables;
    import org.codefilarete.tool.collection.ReadOnlyIterator;
    import org.codefilarete.tool.function.Converter;

    import static org.codefilarete.tool.Nullable.nullable;

    public interface EmbeddableMappingConfiguration<C> {

    	static <C> EmbeddableMappingConfiguration<C> fromCompositeKeyMappingConfiguration(CompositeKeyMappingConfiguration<C> compositeKeyMappingConfiguration) {
    		return new EmbeddableMappingConfiguration<C>() {

    			private final List<EmbeddableLinkage> linkages = Iterables.collectToList(compositeKeyMappingConfiguration.getPropertiesMapping(), embeddableLinkage -> new EmbeddableLinkage() {
    				@Override
    				public ReversibleAccessor getAccessor() {
    					return embeddableLinkage.getAccessor();
    				}

    				@Nullable
    				@Override
    				public String getFieldName() {
    					return embeddableLinkage.getFieldName();
    				}

    				@Nullable
    				@Override
    				public String getColumnName() {
    					return embeddableLinkage.getColumnName();
    				}

    				@Nullable
    				@Override
    				public Size getColumnSize() {
    					return embeddableLinkage.getColumnSize();
    				}

    				@Override
    				public Class getColumnType() {
    					return embeddableLinkage.getColumnType();
    				}

    				@Override
    				public String getExtraTableName() {
    					// we have to return null here since this method is used by EmbeddableMappingBuilder to keep
    					// properties of main table
    					// TODO : a better EmbeddableLinkage API
    					return null;
    				}

    				@Nullable
    				@Override
    				public ParameterBinder<Object> getParameterBinder() {
    					return embeddableLinkage.getParameterBinder();
    				}

    				@Nullable
    				@Override
    				public EnumBindType getEnumBindType() {
    					return embeddableLinkage.getEnumBindType();
    				}

    				@Override
    				public Boolean isNullable() {
    					return false;
    				}

    				@Override
    				public boolean isReadonly() {
    					return false;
    				}

    				@Override
    				public boolean isUnique() {
    					return false;
    				}

    				@Nullable
    				@Override
    				public Converter getReadConverter() {
    					// no special converter for composite key (makes no sense), not available by API too
    					return null;
    				}

    				@Nullable
    				@Override
    				public Converter getWriteConverter() {
    					// no special converter for composite key (makes no sense), not available by API too
    					return null;
    				}
    			});

    			@Override
    			public Class<C> getBeanType() {
    				return compositeKeyMappingConfiguration.getBeanType();
    			}

    			@Override
    			@Nullable
    			public EmbeddableMappingConfiguration<? super C> getMappedSuperClassConfiguration() {
    				return nullable(compositeKeyMappingConfiguration.getMappedSuperClassConfiguration())
    						.map(EmbeddableMappingConfiguration::fromCompositeKeyMappingConfiguration)
    						.get();
    			}

    			@Override
    			public List<EmbeddableLinkage> getPropertiesMapping() {
    				return linkages;
    			}

    			@Override
    			public Collection<Inset<C, Object>> getInsets() {
    				return Iterables.collectToList(compositeKeyMappingConfiguration.getInsets(), compositeInset -> new Inset<C, Object>() {
    					@Override
    					public PropertyAccessor<C, Object> getAccessor() {
    						return compositeInset.getAccessor();
    					}

    					@Override
    					public Method getInsetAccessor() {
    						return compositeInset.getInsetAccessor();
    					}

    					@Override
    					public Class<Object> getEmbeddedClass() {
    						return compositeInset.getEmbeddedClass();
    					}

    					@Override
    					public ValueAccessPointSet<C> getExcludedProperties() {
    						return compositeInset.getExcludedProperties();
    					}

    					@Override
    					public ValueAccessPointMap<C, String> getOverriddenColumnNames() {
    						return compositeInset.getOverriddenColumnNames();
    					}

    					@Override
    					public ValueAccessPointMap<C, Size> getOverriddenColumnSizes() {
    						return compositeInset.getOverriddenColumnSizes();
    					}

    					@Override
    					public ValueAccessPointMap<C, Column> getOverriddenColumns() {
    						return compositeInset.getOverriddenColumns();
    					}

    					@Override
    					public EmbeddableMappingConfiguration<Object> getConfiguration() {
    						return fromCompositeKeyMappingConfiguration(compositeInset.getConfigurationProvider().getConfiguration());
    					}
    				});
    			}

    			@Override
    			public UniqueConstraintNamingStrategy getUniqueConstraintNamingStrategy() {
    				// no UniqueConstraintNamingStrategy for compositeKey, this would be nonsense.
    				return null;
    			}
    		};
    	}

    	static <C> EmbeddableMappingConfiguration<C> fromEmbeddableMappingConfiguration(org.codefilarete.stalactite.dsl.embeddable.EmbeddableMappingConfiguration<C> embeddableMappingConfiguration) {
    		return new EmbeddableMappingConfiguration<C>() {

    			private final List<EmbeddableLinkage> linkages = Iterables.collectToList(embeddableMappingConfiguration.getPropertiesMapping(), EmbeddableLinkageSupport::new);

    			@Override
    			public Class<C> getBeanType() {
    				return embeddableMappingConfiguration.getBeanType();
    			}

    			@Override
    			@Nullable
    			public EmbeddableMappingConfiguration<? super C> getMappedSuperClassConfiguration() {
    				return nullable(embeddableMappingConfiguration.getMappedSuperClassConfiguration())
    						.map(EmbeddableMappingConfiguration::fromEmbeddableMappingConfiguration)
    						.get();
    			}

    			@Override
    			public List<EmbeddableLinkage> getPropertiesMapping() {
    				return linkages;
    			}

    			@Override
    			public Collection<Inset<C, Object>> getInsets() {
    				return Iterables.collectToList(embeddableMappingConfiguration.getInsets(), embeddableInset -> new Inset<C, Object>() {
    					@Override
    					public Accessor<C, Object> getAccessor() {
    						return embeddableInset.getAccessor();
    					}

    					@Override
    					public Method getInsetAccessor() {
    						return embeddableInset.getInsetAccessor();
    					}

    					@Override
    					public Class<Object> getEmbeddedClass() {
    						return embeddableInset.getEmbeddedClass();
    					}

    					@Override
    					public ValueAccessPointSet<C> getExcludedProperties() {
    						return embeddableInset.getExcludedProperties();
    					}

    					@Override
    					public ValueAccessPointMap<C, String> getOverriddenColumnNames() {
    						return embeddableInset.getOverriddenColumnNames();
    					}

    					@Override
    					public ValueAccessPointMap<C, Size> getOverriddenColumnSizes() {
    						return embeddableInset.getOverriddenColumnSizes();
    					}

    					@Override
    					public ValueAccessPointMap<C, Column> getOverriddenColumns() {
    						return embeddableInset.getOverriddenColumns();
    					}

    					@Override
    					public EmbeddableMappingConfiguration<Object> getConfiguration() {
    						return fromEmbeddableMappingConfiguration(embeddableInset.getConfigurationProvider().getConfiguration());
    					}
    				});
    			}

    			@Override
    			public UniqueConstraintNamingStrategy getUniqueConstraintNamingStrategy() {
    				return embeddableMappingConfiguration.getUniqueConstraintNamingStrategy();
    			}
    		};
    	}

    	Class<C> getBeanType();

    	@SuppressWarnings("squid:S1452" /* Can't remove wildcard here because it requires to create a local generic "super" type which is forbidden */)
    	@Nullable
    	EmbeddableMappingConfiguration<? super C> getMappedSuperClassConfiguration();

    	List<EmbeddableLinkage> getPropertiesMapping();

    	Collection<Inset<C, Object>> getInsets();

    	UniqueConstraintNamingStrategy getUniqueConstraintNamingStrategy();

    	/**
    	 * @return an iterable for all inheritance configurations, including this
    	 */
    	default Iterable<EmbeddableMappingConfiguration> inheritanceIterable() {

    		return () -> new ReadOnlyIterator<EmbeddableMappingConfiguration>() {

    			private EmbeddableMappingConfiguration next = EmbeddableMappingConfiguration.this;

    			@Override
    			public boolean hasNext() {
    				return next != null;
    			}

    			@Override
    			public EmbeddableMappingConfiguration next() {
    				if (!hasNext()) {
    					// comply with next() method contract
    					throw new NoSuchElementException();
    				}
    				EmbeddableMappingConfiguration result = this.next;
    				this.next = this.next.getMappedSuperClassConfiguration();
    				return result;
    			}
    		};
    	}

    	class EmbeddableLinkageSupport<C, O> implements EmbeddableLinkage<C, O> {

    		private final Linkage<C, O> dslLinkage;

    		public EmbeddableLinkageSupport(Linkage<C, O> dslLinkage) {
    			this.dslLinkage = dslLinkage;
    		}

    		public Linkage<C, O> getDslLinkage() {
    			return dslLinkage;
    		}

    		@Override
    		public ReversibleAccessor<C, O> getAccessor() {
    			return dslLinkage.getAccessor();
    		}

    		@Nullable
    		@Override
    		public String getFieldName() {
    			return dslLinkage.getFieldName();
    		}

    		@Nullable
    		@Override
    		public String getColumnName() {
    			return dslLinkage.getColumnName();
    		}

    		@Nullable
    		@Override
    		public Size getColumnSize() {
    			return dslLinkage.getColumnSize();
    		}

    		@Override
    		public Class<O> getColumnType() {
    			return dslLinkage.getColumnType();
    		}

    		@Nullable
    		@Override
    		public String getExtraTableName() {
    			return dslLinkage.getExtraTableName();
    		}

    		@Override
    		@Nullable
    		public ParameterBinder<Object> getParameterBinder() {
    			return dslLinkage.getParameterBinder();
    		}

    		@Nullable
    		@Override
    		public EnumBindType getEnumBindType() {
    			return dslLinkage.getEnumBindType();
    		}

    		@Nullable
    		@Override
    		public Boolean isNullable() {
    			return dslLinkage.isNullable();
    		}

    		@Override
    		public boolean isReadonly() {
    			return dslLinkage.isReadonly();
    		}

    		@Override
    		public boolean isUnique() {
    			return dslLinkage.isUnique();
    		}

    		@Nullable
    		@Override
    		public Converter<?, O> getReadConverter() {
    			return dslLinkage.getReadConverter();
    		}

    		@Nullable
    		@Override
    		public Converter<O, ?> getWriteConverter() {
    			return dslLinkage.getWriteConverter();
    		}
    	}
    }