package org.hibernate.envers.configuration.metadata.reader;
import static org.hibernate.envers.tools.Tools.newHashSet;
import java.lang.annotation.Annotation;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import javax.persistence.JoinColumn;
import javax.persistence.MapKey;
import javax.persistence.Version;
import org.hibernate.annotations.common.reflection.XClass;
import org.hibernate.annotations.common.reflection.XProperty;
import org.hibernate.annotations.common.reflection.ReflectionManager;
import org.hibernate.envers.*;
import org.hibernate.envers.configuration.GlobalConfiguration;
import org.hibernate.envers.tools.MappingTools;
import org.hibernate.mapping.Component;
import org.hibernate.mapping.Property;
import org.hibernate.mapping.Value;
import org.hibernate.MappingException;
/**
* Reads persistent properties form a
* {@link org.hibernate.envers.configuration.metadata.reader.PersistentPropertiesSource}
* and adds the ones that are audited to a
* {@link org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesHolder},
* filling all the auditing data.
* @author Adam Warski (adam at warski dot org)
* @author Erik-Berndt Scheper
*/
public class AuditedPropertiesReader {
private final ModificationStore defaultStore;
private final PersistentPropertiesSource persistentPropertiesSource;
private final AuditedPropertiesHolder auditedPropertiesHolder;
private final GlobalConfiguration globalCfg;
private final ReflectionManager reflectionManager;
private final String propertyNamePrefix;
private final Set<String> propertyAccessedPersistentProperties;
private final Set<String> fieldAccessedPersistentProperties;
public AuditedPropertiesReader(ModificationStore defaultStore,
PersistentPropertiesSource persistentPropertiesSource,
AuditedPropertiesHolder auditedPropertiesHolder,
GlobalConfiguration globalCfg,
ReflectionManager reflectionManager,
String propertyNamePrefix) {
this.defaultStore = defaultStore;
this.persistentPropertiesSource = persistentPropertiesSource;
this.auditedPropertiesHolder = auditedPropertiesHolder;
this.globalCfg = globalCfg;
this.reflectionManager = reflectionManager;
this.propertyNamePrefix = propertyNamePrefix;
propertyAccessedPersistentProperties = newHashSet();
fieldAccessedPersistentProperties = newHashSet();
}
public void read() {
// First reading the access types for the persistent properties.
readPersistentPropertiesAccess();
// Adding all properties from the given class.
addPropertiesFromClass(persistentPropertiesSource.getXClass());
}
private void readPersistentPropertiesAccess() {
Iterator propertyIter = persistentPropertiesSource.getPropertyIterator();
while (propertyIter.hasNext()) {
Property property = (Property) propertyIter.next();
if ("field".equals(property.getPropertyAccessorName())) {
fieldAccessedPersistentProperties.add(property.getName());
} else {
propertyAccessedPersistentProperties.add(property.getName());
}
}
}
private void addPropertiesFromClass(XClass clazz) {
XClass superclazz = clazz.getSuperclass();
if (!"java.lang.Object".equals(superclazz.getName())) {
addPropertiesFromClass(superclazz);
}
addFromProperties(clazz.getDeclaredProperties("field"), "field", fieldAccessedPersistentProperties);
addFromProperties(clazz.getDeclaredProperties("property"), "property", propertyAccessedPersistentProperties);
}
private void addFromProperties(Iterable<XProperty> properties, String accessType, Set<String> persistentProperties) {
for (XProperty property : properties) {
// If this is not a persistent property, with the same access type as currently checked,
// it's not audited as well.
if (persistentProperties.contains(property.getName())) {
Value propertyValue = persistentPropertiesSource.getProperty(property.getName()).getValue();
PropertyAuditingData propertyData;
boolean isAudited;
if (propertyValue instanceof Component) {
ComponentAuditingData componentData = new ComponentAuditingData();
isAudited = fillPropertyData(property, componentData, accessType);
PersistentPropertiesSource componentPropertiesSource = new ComponentPropertiesSource(
(Component) propertyValue);
new AuditedPropertiesReader(ModificationStore.FULL, componentPropertiesSource, componentData,
globalCfg, reflectionManager,
propertyNamePrefix + MappingTools.createComponentPrefix(property.getName()))
.read();
propertyData = componentData;
} else {
propertyData = new PropertyAuditingData();
isAudited = fillPropertyData(property, propertyData, accessType);
}
if (isAudited) {
// Now we know that the property is audited
auditedPropertiesHolder.addPropertyAuditingData(property.getName(), propertyData);
}
}
}
}
/**
* Checks if a property is audited and if yes, fills all of its data.
* @param property Property to check.
* @param propertyData Property data, on which to set this property's modification store.
* @param accessType Access type for the property.
* @return False if this property is not audited.
*/
private boolean fillPropertyData(XProperty property, PropertyAuditingData propertyData,
String accessType) {
// check if a property is declared as not audited to exclude it
// useful if a class is audited but some properties should be excluded
NotAudited unVer = property.getAnnotation(NotAudited.class);
if (unVer != null) {
return false;
} else {
// if the optimistic locking field has to be unversioned and the current property
// is the optimistic locking field, don't audit it
if (globalCfg.isDoNotAuditOptimisticLockingField()) {
Version jpaVer = property.getAnnotation(Version.class);
if (jpaVer != null) {
return false;
}
}
}
// Checking if this property is explicitly audited or if all properties are.
Audited aud = property.getAnnotation(Audited.class);
if (aud != null) {
propertyData.setStore(aud.modStore());
propertyData.setRelationTargetAuditMode(aud.targetAuditMode());
} else {
if (defaultStore != null) {
propertyData.setStore(defaultStore);
} else {
return false;
}
}
propertyData.setName(propertyNamePrefix + property.getName());
propertyData.setBeanName(property.getName());
propertyData.setAccessType(accessType);
addPropertyJoinTables(property, propertyData);
addPropertyAuditingOverrides(property, propertyData);
if (!processPropertyAuditingOverrides(property, propertyData)) {
return false; // not audited due to AuditOverride annotation
}
addPropertyMapKey(property, propertyData);
setPropertyAuditMappedBy(property, propertyData);
return true;
}
private void setPropertyAuditMappedBy(XProperty property, PropertyAuditingData propertyData) {
AuditMappedBy auditMappedBy = property.getAnnotation(AuditMappedBy.class);
if (auditMappedBy != null) {
propertyData.setAuditMappedBy(auditMappedBy.mappedBy());
if (!"".equals(auditMappedBy.positionMappedBy())) {
propertyData.setPositionMappedBy(auditMappedBy.positionMappedBy());
}
}
}
private void addPropertyMapKey(XProperty property, PropertyAuditingData propertyData) {
MapKey mapKey = property.getAnnotation(MapKey.class);
if (mapKey != null) {
propertyData.setMapKey(mapKey.name());
}
}
private void addPropertyJoinTables(XProperty property, PropertyAuditingData propertyData) {
// first set the join table based on the AuditJoinTable annotation
AuditJoinTable joinTable = property.getAnnotation(AuditJoinTable.class);
if (joinTable != null) {
propertyData.setJoinTable(joinTable);
} else {
propertyData.setJoinTable(DEFAULT_AUDIT_JOIN_TABLE);
}
}
/***
* Add the {@link org.hibernate.envers.AuditOverride} annotations.
*
* @param property the property being processed
* @param propertyData the Envers auditing data for this property
*/
private void addPropertyAuditingOverrides(XProperty property, PropertyAuditingData propertyData) {
AuditOverride annotationOverride = property.getAnnotation(AuditOverride.class);
if (annotationOverride != null) {
propertyData.addAuditingOverride(annotationOverride);
}
AuditOverrides annotationOverrides = property.getAnnotation(AuditOverrides.class);
if (annotationOverrides != null) {
propertyData.addAuditingOverrides(annotationOverrides);
}
}
/**
* Process the {@link org.hibernate.envers.AuditOverride} annotations for this property.
*
* @param property
* the property for which the {@link org.hibernate.envers.AuditOverride}
* annotations are being processed
* @param propertyData
* the Envers auditing data for this property
* @return {@code false} if isAudited() of the override annotation was set to
*/
private boolean processPropertyAuditingOverrides(XProperty property, PropertyAuditingData propertyData) {
// if this property is part of a component, process all override annotations
if (this.auditedPropertiesHolder instanceof ComponentAuditingData) {
List<AuditOverride> overrides = ((ComponentAuditingData) this.auditedPropertiesHolder).getAuditingOverrides();
for (AuditOverride override : overrides) {
if (property.getName().equals(override.name())) {
// the override applies to this property
if (!override.isAudited()) {
return false;
} else {
if (override.auditJoinTable() != null) {
propertyData.setJoinTable(override.auditJoinTable());
}
}
}
}
}
return true;
}
private static AuditJoinTable DEFAULT_AUDIT_JOIN_TABLE = new AuditJoinTable() {
public String name() { return ""; }
public String schema() { return ""; }
public String catalog() { return ""; }
public JoinColumn[] inverseJoinColumns() { return new JoinColumn[0]; }
public Class<? extends Annotation> annotationType() { return this.getClass(); }
};
private class ComponentPropertiesSource implements PersistentPropertiesSource {
private final XClass xclass;
private final Component component;
private ComponentPropertiesSource(Component component) {
try {
this.xclass = reflectionManager.classForName(component.getComponentClassName(), this.getClass());
} catch (ClassNotFoundException e) {
throw new MappingException(e);
}
this.component = component;
}
@SuppressWarnings({"unchecked"})
public Iterator<Property> getPropertyIterator() { return component.getPropertyIterator(); }
public Property getProperty(String propertyName) { return component.getProperty(propertyName); }
public XClass getXClass() { return xclass; }
}
}