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AbstractIdentifiableType.java
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AbstractIdentifiableType.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.model.metamodel;
import java.lang.reflect.Modifier;
import java.util.*;
import java.util.stream.Collectors;
public abstract class AbstractIdentifiableType<X> implements IdentifiableType<X> {
private final Class<X> javaType;
private Identifier identifier;
private AbstractIdentifiableType<? super X> supertype;
private final Set<AbstractIdentifiableType<? extends X>> subtypes = new HashSet<>(2);
private TypesSpecification<X, ?> directTypes;
private PropertiesSpecification<X, ?, ?, ?> properties;
private final Map<String, Attribute<X, ?>> declaredAttributes = new HashMap<>();
private EntityLifecycleListenerManager lifecycleListenerManager = EntityLifecycleListenerManager.empty();
AbstractIdentifiableType(Class<X> javaType) {
this.javaType = javaType;
}
void addDeclaredAttribute(final String name, final Attribute<X, ?> a) {
declaredAttributes.put(name, a);
}
void setSupertype(AbstractIdentifiableType<? super X> supertype) {
assert supertype != null;
this.supertype = supertype;
supertype.addSubtype(this);
}
private void addSubtype(AbstractIdentifiableType<? extends X> subtype) {
subtypes.add(subtype);
}
void addDirectTypes(TypesSpecification<X, ?> a) {
this.directTypes = a;
}
void addOtherProperties(PropertiesSpecification<X, ?, ?, ?> a) {
this.properties = a;
}
public void setIdentifier(final Identifier identifier) {
this.identifier = identifier;
}
@Override
public boolean hasSingleIdAttribute() {
return true; // We do not support id classes
}
@Override
public <Y> SingularAttribute<X, Y> getDeclaredVersion(Class<Y> type) {
// TODO
throw new UnsupportedOperationException();
}
@Override
public AbstractIdentifiableType<? super X> getSupertype() {
return supertype;
}
/**
* Whether this managed type has any managed subtypes (entities or mapped superclasses).
*
* @return {@code true} when managed subtypes exist, {@code false} otherwise
*/
public boolean hasSubtypes() {
return !subtypes.isEmpty();
}
/**
* Whether the Java type represented by this type is an abstract class.
*
* @return {@code true} if the represented Java type is abstract, {@code false} otherwise
*/
public boolean isAbstract() {
return Modifier.isAbstract(javaType.getModifiers());
}
public Set<AbstractIdentifiableType<? extends X>> getSubtypes() {
return Collections.unmodifiableSet(subtypes);
}
@Override
public <Y> SingularAttribute<? super X, Y> getVersion(Class<Y> type) {
// TODO
throw new UnsupportedOperationException();
}
@Override
public boolean hasVersionAttribute() {
return false;
}
@Override
public Set<Attribute<? super X, ?>> getAttributes() {
final Set<Attribute<? super X, ?>> attributes = new HashSet<>(declaredAttributes.values());
if (supertype != null) {
attributes.addAll(supertype.getAttributes());
}
return attributes;
}
@Override
public Attribute<? super X, ?> getAttribute(String name) {
Objects.requireNonNull(name);
if (declaredAttributes.containsKey(name)) {
return declaredAttributes.get(name);
}
if (supertype != null) {
return supertype.getAttribute(name);
}
throw new IllegalArgumentException("Attribute " + name + " is not present in type " + this.toString());
}
@Override
public CollectionAttribute<? super X, ?> getCollection(String name) {
return getCollection(name, Object.class);
}
@Override
public <E> CollectionAttribute<? super X, E> getCollection(String name, Class<E> elementType) {
return getPluralAttribute("Collection", name, elementType, CollectionAttribute.class);
}
private <E, R extends PluralAttribute<? super X, ?, E>> R getPluralAttribute(String type, String name,
Class<E> elementType,
Class<R> attType) {
final Attribute<? super X, ?> a = getAttribute(name);
checkPluralAttribute(a, type, name, elementType, attType, false);
return attType.cast(a);
}
private <E, R extends PluralAttribute<? super X, ?, E>> void checkPluralAttribute(Attribute<? super X, ?> att,
String type, String name,
Class<E> elementType,
Class<R> attType,
boolean declared) {
if (!attType.isAssignableFrom(att.getClass())) {
throw pluralAttNotFound(type, name, elementType, declared);
}
final PluralAttribute<? super X, ?, E> colAtt = (PluralAttribute<? super X, ?, E>) att;
if (!elementType.isAssignableFrom(colAtt.getBindableJavaType())) {
throw pluralAttNotFound(type, name, elementType, declared);
}
}
private IllegalArgumentException pluralAttNotFound(String type, String name, Class<?> elementType,
boolean declared) {
return new IllegalArgumentException(type + " attribute " + name + " with element type " + elementType +
" is not " + (declared ? "declared" : "present") + " in type " + this);
}
@Override
public <E> ListAttribute<? super X, E> getList(String name, Class<E> elementType) {
return getPluralAttribute("List", name, elementType, ListAttribute.class);
}
@Override
public ListAttribute<? super X, ?> getList(String name) {
return getList(name, Object.class);
}
@Override
public <K, V> MapAttribute<? super X, K, V> getMap(String name, Class<K> keyType, Class<V> valueType) {
throw new UnsupportedOperationException();
}
@Override
public MapAttribute<? super X, ?, ?> getMap(String name) {
return getMap(name, Object.class, Object.class);
}
@Override
public <E> SetAttribute<? super X, E> getSet(String name, Class<E> elementType) {
return getPluralAttribute("Set", name, elementType, SetAttribute.class);
}
@Override
public SetAttribute<? super X, ?> getSet(String name) {
return getSet(name, Object.class);
}
@Override
public Set<PluralAttribute<? super X, ?, ?>> getPluralAttributes() {
final Set<PluralAttribute<? super X, ?, ?>> plurals = new HashSet<>();
plurals.addAll(getDeclaredPluralAttributes());
if (supertype != null) {
plurals.addAll(supertype.getPluralAttributes());
}
return plurals;
}
@Override
public Set<SingularAttribute<? super X, ?>> getSingularAttributes() {
final Set<SingularAttribute<? super X, ?>> singulars = new HashSet<>();
singulars.addAll(getDeclaredSingularAttributes());
if (supertype != null) {
singulars.addAll(supertype.getSingularAttributes());
}
return singulars;
}
@Override
public <Y> SingularAttribute<? super X, Y> getSingularAttribute(String name, Class<Y> type) {
final Attribute<? super X, ?> a = getAttribute(name);
if (a.isCollection()) {
throw singularAttNotFound(name, type, false);
}
assert a instanceof SingularAttribute;
if (!type.isAssignableFrom(a.getJavaType())) {
throw singularAttNotFound(name, type, false);
}
return (SingularAttribute<? super X, Y>) a;
}
private IllegalArgumentException singularAttNotFound(String name, Class<?> type, boolean declared) {
return new IllegalArgumentException(
"Singular attribute " + name + " of type " + type + " is not " + (declared ? "declared" : "present") +
" in type " + this);
}
@Override
public SingularAttribute<? super X, ?> getSingularAttribute(String name) {
return getSingularAttribute(name, Object.class);
}
@Override
public Set<Attribute<X, ?>> getDeclaredAttributes() {
return new HashSet<>(declaredAttributes.values());
}
@Override
public Set<PluralAttribute<X, ?, ?>> getDeclaredPluralAttributes() {
return declaredAttributes.values().stream().filter(Attribute::isCollection)
.map(a -> (PluralAttribute<X, ?, ?>) a).collect(Collectors.toSet());
}
@Override
public Set<SingularAttribute<X, ?>> getDeclaredSingularAttributes() {
return declaredAttributes.values().stream().filter(att -> !att.isCollection()).map(
a -> (SingularAttribute<X, ?>) a).collect(Collectors.toSet());
}
@Override
public Attribute<X, ?> getDeclaredAttribute(String name) {
if (declaredAttributes.containsKey(name)) {
return declaredAttributes.get(name);
}
throw new IllegalArgumentException("Attribute " + name + " is not declared in type " + name);
}
@Override
public <E> CollectionAttribute<X, E> getDeclaredCollection(String name, Class<E> elementType) {
return getDeclaredPluralAttribute("Collection", name, elementType, CollectionAttribute.class);
}
private <E, R extends PluralAttribute<? super X, ?, E>> R getDeclaredPluralAttribute(String type, String name,
Class<E> elementType,
Class<R> attType) {
final Attribute<? super X, ?> a = getDeclaredAttribute(name);
checkPluralAttribute(a, type, name, elementType, attType, true);
return attType.cast(a);
}
@Override
public CollectionAttribute<X, ?> getDeclaredCollection(String name) {
return getDeclaredCollection(name, Object.class);
}
@Override
public <E> ListAttribute<X, E> getDeclaredList(String name, Class<E> elementType) {
return getDeclaredPluralAttribute("List", name, elementType, ListAttribute.class);
}
@Override
public ListAttribute<X, ?> getDeclaredList(String name) {
return getDeclaredList(name, Object.class);
}
@Override
public <K, V> MapAttribute<X, K, V> getDeclaredMap(String name, Class<K> keyType, Class<V> valueType) {
throw new UnsupportedOperationException();
}
@Override
public MapAttribute<X, ?, ?> getDeclaredMap(String name) {
return getDeclaredMap(name, Object.class, Object.class);
}
@Override
public <E> SetAttribute<X, E> getDeclaredSet(String name, Class<E> elementType) {
return getDeclaredPluralAttribute("Set", name, elementType, SetAttribute.class);
}
@Override
public SetAttribute<X, ?> getDeclaredSet(String name) {
return getDeclaredSet(name, Object.class);
}
@Override
public <Y> SingularAttribute<X, Y> getDeclaredSingularAttribute(String name, Class<Y> type) {
final Attribute<X, ?> a = getDeclaredAttribute(name);
if (a.isCollection()) {
throw singularAttNotFound(name, type, true);
}
if (!type.isAssignableFrom(a.getJavaType())) {
throw singularAttNotFound(name, type, true);
}
return (SingularAttribute<X, Y>) a;
}
@Override
public SingularAttribute<X, ?> getDeclaredSingularAttribute(String name) {
return getDeclaredSingularAttribute(name, Object.class);
}
@Override
public TypesSpecification<? super X, ?> getTypes() {
if (directTypes != null) {
return directTypes;
}
return supertype != null ? supertype.getTypes() : null;
}
@Override
public PropertiesSpecification<? super X, ?, ?, ?> getProperties() {
if (properties != null) {
return properties;
}
return supertype != null ? supertype.getProperties() : null;
}
@Override
public Set<FieldSpecification<? super X, ?>> getFieldSpecifications() {
final Set<FieldSpecification<? super X, ?>> specs = new HashSet<>(getAttributes());
final TypesSpecification<? super X, ?> types = getTypes();
if (types != null) {
specs.add(types);
}
final PropertiesSpecification<? super X, ?, ?, ?> props = getProperties();
if (props != null) {
specs.add(props);
}
return specs;
}
@Override
public FieldSpecification<? super X, ?> getFieldSpecification(String fieldName) {
if (declaredAttributes.containsKey(fieldName)) {
return declaredAttributes.get(fieldName);
}
if (directTypes != null && directTypes.getName().equals(fieldName)) {
return directTypes;
} else if (properties != null && properties.getName().equals(fieldName)) {
return properties;
}
if (supertype != null) {
return supertype.getFieldSpecification(fieldName);
}
throw new IllegalArgumentException("Field " + fieldName + " is not present in type " + this);
}
@Override
public Identifier getIdentifier() {
if (identifier != null) {
return identifier;
}
if (supertype != null) {
return supertype.getIdentifier();
}
// This shouldn't happen, because every entity has to contain an identifier, otherwise metamodel building fails
throw new IllegalArgumentException("Identifier attribute is not present in type " + this);
}
@Override
public Class<X> getJavaType() {
return javaType;
}
public EntityLifecycleListenerManager getLifecycleListenerManager() {
return lifecycleListenerManager;
}
public void setLifecycleListenerManager(EntityLifecycleListenerManager lifecycleListenerManager) {
this.lifecycleListenerManager = lifecycleListenerManager;
}
}