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com.avaje.ebeaninternal.server.deploy.BeanPropertyAssocOne Maven / Gradle / Ivy
package com.avaje.ebeaninternal.server.deploy;
import com.avaje.ebean.EbeanServer;
import com.avaje.ebean.Query;
import com.avaje.ebean.SqlUpdate;
import com.avaje.ebean.Transaction;
import com.avaje.ebean.ValuePair;
import com.avaje.ebean.bean.EntityBean;
import com.avaje.ebean.bean.PersistenceContext;
import com.avaje.ebeaninternal.server.cache.CacheChangeSet;
import com.avaje.ebeaninternal.server.cache.CachedBeanData;
import com.avaje.ebeaninternal.server.core.DefaultSqlUpdate;
import com.avaje.ebeaninternal.server.deploy.id.ImportedId;
import com.avaje.ebeaninternal.server.deploy.meta.DeployBeanPropertyAssocOne;
import com.avaje.ebeaninternal.server.el.ElPropertyChainBuilder;
import com.avaje.ebeaninternal.server.el.ElPropertyValue;
import com.avaje.ebeaninternal.server.query.SplitName;
import com.avaje.ebeaninternal.server.query.SqlBeanLoad;
import com.avaje.ebeaninternal.server.query.SqlJoinType;
import com.avaje.ebeaninternal.server.text.json.ReadJson;
import com.avaje.ebeaninternal.server.text.json.WriteJson;
import javax.persistence.PersistenceException;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Property mapped to a joined bean.
*/
public class BeanPropertyAssocOne extends BeanPropertyAssoc {
private final boolean oneToOne;
private final boolean oneToOneExported;
private final boolean importedPrimaryKey;
private AssocOneHelp localHelp;
protected final BeanProperty[] embeddedProps;
private final HashMap embeddedPropsMap;
/**
* The information for Imported foreign Keys.
*/
protected ImportedId importedId;
private ExportedProperty[] exportedProperties;
private String deleteByParentIdSql;
private String deleteByParentIdInSql;
private BeanPropertyAssocMany relationshipProperty;
/**
* Create based on deploy information of an EmbeddedId.
*/
public BeanPropertyAssocOne(BeanDescriptorMap owner, DeployBeanPropertyAssocOne deploy) {
this(owner, null, deploy);
}
/**
* Create the property.
*/
public BeanPropertyAssocOne(BeanDescriptorMap owner, BeanDescriptor descriptor,
DeployBeanPropertyAssocOne deploy) {
super(descriptor, deploy);
importedPrimaryKey = deploy.isImportedPrimaryKey();
oneToOne = deploy.isOneToOne();
oneToOneExported = deploy.isOneToOneExported();
if (embedded) {
// Overriding of the columns and use table alias of owning BeanDescriptor
BeanEmbeddedMeta overrideMeta = BeanEmbeddedMetaFactory.create(owner, deploy);
embeddedProps = overrideMeta.getProperties();
embeddedPropsMap = new HashMap();
for (int i = 0; i < embeddedProps.length; i++) {
embeddedPropsMap.put(embeddedProps[i].getName(), embeddedProps[i]);
}
} else {
embeddedProps = null;
embeddedPropsMap = null;
}
}
@Override
public void initialise() {
super.initialise();
localHelp = createHelp(embedded, oneToOneExported);
if (!isTransient) {
//noinspection StatementWithEmptyBody
if (embedded) {
// no imported or exported information
} else if (!oneToOneExported) {
importedId = createImportedId(this, targetDescriptor, tableJoin);
if (importedId.isScalar()) {
// limit JoinColumn mapping to the @Id / primary key
TableJoinColumn[] columns = tableJoin.columns();
String foreignJoinColumn = columns[0].getForeignDbColumn();
String foreignIdColumn = targetDescriptor.getIdProperty().getDbColumn();
if (!foreignJoinColumn.equalsIgnoreCase(foreignIdColumn)) {
throw new PersistenceException("Mapping limitation - @JoinColumn on " + getFullBeanName() + " needs to map to a primary key as per Issue #529 "
+ " - joining to " + foreignJoinColumn + " and not " + foreignIdColumn);
}
}
} else {
exportedProperties = createExported();
String delStmt = "delete from " + targetDescriptor.getBaseTable() + " where ";
deleteByParentIdSql = delStmt + deriveWhereParentIdSql(false);
deleteByParentIdInSql = delStmt + deriveWhereParentIdSql(true);
}
}
}
/**
* Return the property value as an entity bean.
*/
public EntityBean getValueAsEntityBean(EntityBean owner) {
return (EntityBean) getValue(owner);
}
void setRelationshipProperty(BeanPropertyAssocMany relationshipProperty) {
this.relationshipProperty = relationshipProperty;
}
BeanPropertyAssocMany getRelationshipProperty() {
return relationshipProperty;
}
void cacheClear() {
if (targetDescriptor.isBeanCaching() && relationshipProperty != null) {
targetDescriptor.cacheManyPropClear(relationshipProperty.getName());
}
}
void cacheDelete(boolean clear, EntityBean bean, CacheChangeSet changeSet) {
if (targetDescriptor.isBeanCaching() && relationshipProperty != null) {
if (clear) {
changeSet.addManyClear(targetDescriptor, relationshipProperty.getName());
} else {
Object assocBean = getValue(bean);
if (assocBean != null) {
Object parentId = targetDescriptor.getId((EntityBean) assocBean);
if (parentId != null) {
changeSet.addManyRemove(targetDescriptor, relationshipProperty.getName(), parentId);
}
}
}
}
}
public ElPropertyValue buildElPropertyValue(String propName, String remainder, ElPropertyChainBuilder chain, boolean propertyDeploy) {
if (embedded) {
BeanProperty embProp = embeddedPropsMap.get(remainder);
if (embProp == null) {
String msg = "Embedded Property " + remainder + " not found in " + getFullBeanName();
throw new PersistenceException(msg);
}
if (chain == null) {
chain = new ElPropertyChainBuilder(true, propName);
}
chain.add(this);
return chain.add(embProp).build();
}
return createElPropertyValue(propName, remainder, chain, propertyDeploy);
}
@Override
public String getElPlaceholder(boolean encrypted) {
return encrypted ? elPlaceHolderEncrypted : elPlaceHolder;
}
public SqlUpdate deleteByParentId(Object parentId, List parentIdist) {
if (parentId != null) {
return deleteByParentId(parentId);
} else {
return deleteByParentIdList(parentIdist);
}
}
private SqlUpdate deleteByParentIdList(List parentIdist) {
StringBuilder sb = new StringBuilder(100);
sb.append(deleteByParentIdInSql);
String inClause = targetIdBinder.getIdInValueExpr(parentIdist.size());
sb.append(inClause);
DefaultSqlUpdate delete = new DefaultSqlUpdate(sb.toString());
for (int i = 0; i < parentIdist.size(); i++) {
targetIdBinder.bindId(delete, parentIdist.get(i));
}
return delete;
}
private SqlUpdate deleteByParentId(Object parentId) {
DefaultSqlUpdate delete = new DefaultSqlUpdate(deleteByParentIdSql);
if (exportedProperties.length == 1) {
delete.addParameter(parentId);
} else {
targetDescriptor.getIdBinder().bindId(delete, parentId);
}
return delete;
}
public List findIdsByParentId(Object parentId, List parentIdist, Transaction t) {
if (parentId != null) {
return findIdsByParentId(parentId, t);
} else {
return findIdsByParentIdList(parentIdist, t);
}
}
private List findIdsByParentId(Object parentId, Transaction t) {
String rawWhere = deriveWhereParentIdSql(false);
EbeanServer server = getBeanDescriptor().getEbeanServer();
Query q = server.find(getPropertyType())
.where().raw(rawWhere).query();
bindWhereParendId(q, parentId);
return server.findIds(q, t);
}
private List findIdsByParentIdList(List parentIdist, Transaction t) {
String rawWhere = deriveWhereParentIdSql(true);
String inClause = targetIdBinder.getIdInValueExpr(parentIdist.size());
String expr = rawWhere + inClause;
EbeanServer server = getBeanDescriptor().getEbeanServer();
Query q = (Query) server.find(getPropertyType())
.where().raw(expr);
for (int i = 0; i < parentIdist.size(); i++) {
bindWhereParendId(q, parentIdist.get(i));
}
return server.findIds(q, t);
}
private void bindWhereParendId(Query q, Object parentId) {
if (exportedProperties.length == 1) {
q.setParameter(1, parentId);
} else {
int pos = 1;
EntityBean parent = (EntityBean) parentId;
for (int i = 0; i < exportedProperties.length; i++) {
Object embVal = exportedProperties[i].getValue(parent);
q.setParameter(pos++, embVal);
}
}
}
void addFkey() {
if (importedId != null) {
importedId.addFkeys(name);
}
}
/**
* Return meta data for the deployment of the embedded bean specific to this
* property.
*/
public BeanProperty[] getProperties() {
return embeddedProps;
}
@Override
public void buildRawSqlSelectChain(String prefix, List selectChain) {
prefix = SplitName.add(prefix, name);
if (!embedded) {
InheritInfo inheritInfo = targetDescriptor.getInheritInfo();
if (inheritInfo != null) {
// expect the discriminator column to be included in order
// to determine the inheritance type so we add it to the
// selectChain (so that it takes a position in the resultSet)
String discriminatorColumn = inheritInfo.getDiscriminatorColumn();
String discProperty = prefix + "." + discriminatorColumn;
selectChain.add(discProperty);
}
targetIdBinder.buildRawSqlSelectChain(prefix, selectChain);
} else {
for (int i = 0; i < embeddedProps.length; i++) {
embeddedProps[i].buildRawSqlSelectChain(prefix, selectChain);
}
}
}
/**
* Return true if this a OneToOne property. Otherwise assumed ManyToOne.
*/
public boolean isOneToOne() {
return oneToOne;
}
/**
* Return true if this is the exported side of a OneToOne.
*/
public boolean isOneToOneExported() {
return oneToOneExported;
}
/**
* If true this bean maps to the primary key.
*/
public boolean isImportedPrimaryKey() {
return importedPrimaryKey;
}
@Override
public void diffForInsert(String prefix, Map map, EntityBean newBean) {
Object newEmb = (newBean == null) ? null : getValue(newBean);
if (newEmb != null) {
prefix = (prefix == null) ? name : prefix + "." + name;
if (embedded) {
getTargetDescriptor().diffForInsert(prefix, map, (EntityBean) newEmb);
} else {
// we are only interested in the Id value
BeanDescriptor targetDescriptor = getTargetDescriptor();
BeanProperty idProperty = targetDescriptor.getIdProperty();
idProperty.diffForInsert(prefix, map, (EntityBean) newEmb);
}
}
}
@Override
public void diff(String prefix, Map map, EntityBean newBean, EntityBean oldBean) {
Object newEmb = (newBean == null) ? null : getValue(newBean);
Object oldEmb = (oldBean == null) ? null : getValue(oldBean);
if (newEmb == null && oldEmb == null) {
return;
}
if (embedded) {
prefix = (prefix == null) ? name : prefix + "." + name;
BeanDescriptor targetDescriptor = getTargetDescriptor();
targetDescriptor.diff(prefix, map, (EntityBean) newEmb, (EntityBean) oldEmb);
} else {
// we are only interested in the Id value
newBean = (EntityBean)newEmb;
oldBean = (EntityBean)oldEmb;
BeanDescriptor targetDescriptor = getTargetDescriptor();
BeanProperty idProperty = targetDescriptor.getIdProperty();
Object newId = (newBean == null) ? null : idProperty.getValue(newBean);
Object oldId = (oldBean == null) ? null : idProperty.getValue(oldBean);
if (newId != null || oldId != null) {
prefix = (prefix == null) ? name : prefix + "." + name;
idProperty.diffVal(prefix, map, newId, oldId);
}
}
}
/**
* Same as getPropertyType(). Return the type of the bean this property
* represents.
*/
public Class getTargetType() {
return getPropertyType();
}
@Override
public Object getCacheDataValue(EntityBean bean) {
Object ap = getValue(bean);
if (ap == null) {
return null;
}
if (embedded) {
return targetDescriptor.cacheEmbeddedBeanExtract((EntityBean) ap);
} else {
return targetDescriptor.getIdProperty().getCacheDataValue((EntityBean) ap);
}
}
@Override
public void setCacheDataValue(EntityBean bean, Object cacheData, PersistenceContext context) {
if (cacheData == null) {
setValue(bean, null);
} else {
if (embedded) {
setValue(bean, targetDescriptor.cacheEmbeddedBeanLoad((CachedBeanData) cacheData, context));
} else {
if (cacheData instanceof String) {
cacheData = targetDescriptor.getIdProperty().scalarType.parse((String)cacheData);
}
// cacheData is the id value, maybe already in persistence context
Object assocBean = targetDescriptor.contextGet(context, cacheData);
if (assocBean == null) {
assocBean = targetDescriptor.createReference(Boolean.FALSE, cacheData, context);
}
setValue(bean, assocBean);
}
}
}
/**
* Return the Id values from the given bean.
*/
@Override
public Object[] getAssocIdValues(EntityBean bean) {
return targetDescriptor.getIdBinder().getIdValues(bean);
}
/**
* Return the Id expression to add to where clause etc.
*/
public String getAssocIdExpression(String prefix, String operator) {
return targetDescriptor.getIdBinder().getAssocOneIdExpr(prefix, operator);
}
/**
* Return the logical id value expression taking into account embedded id's.
*/
@Override
public String getAssocIdInValueExpr(int size) {
return targetDescriptor.getIdBinder().getIdInValueExpr(size);
}
/**
* Return the logical id in expression taking into account embedded id's.
*/
@Override
public String getAssocIdInExpr(String prefix) {
return targetDescriptor.getIdBinder().getAssocIdInExpr(prefix);
}
@Override
public boolean isAssocId() {
return !embedded;
}
@Override
public boolean isAssocProperty() {
return !embedded;
}
/**
* Create a bean of the target type to be used as an embeddedId
* value.
*/
public Object createEmbeddedId() {
return getTargetDescriptor().createEntityBean();
}
@Override
public Object pathGetNested(Object bean) {
Object value = getValueIntercept((EntityBean)bean);
if (value == null) {
value = targetDescriptor.createEntityBean();
setValueIntercept((EntityBean)bean, value);
}
return value;
}
public ImportedId getImportedId() {
return importedId;
}
private String deriveWhereParentIdSql(boolean inClause) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < exportedProperties.length; i++) {
String fkColumn = exportedProperties[i].getForeignDbColumn();
if (i > 0) {
String s = inClause ? "," : " and ";
sb.append(s);
}
sb.append(fkColumn);
if (!inClause) {
sb.append("=? ");
}
}
return sb.toString();
}
/**
* Create the array of ExportedProperty used to build reference objects.
*/
private ExportedProperty[] createExported() {
BeanProperty idProp = descriptor.getIdProperty();
ArrayList list = new ArrayList();
if (idProp != null && idProp.isEmbedded()) {
BeanPropertyAssocOne one = (BeanPropertyAssocOne) idProp;
BeanDescriptor targetDesc = one.getTargetDescriptor();
BeanProperty[] emIds = targetDesc.propertiesBaseScalar();
try {
for (int i = 0; i < emIds.length; i++) {
ExportedProperty expProp = findMatch(true, emIds[i]);
list.add(expProp);
}
} catch (PersistenceException e) {
// not found as individual scalar properties
e.printStackTrace();
}
} else {
if (idProp != null) {
ExportedProperty expProp = findMatch(false, idProp);
list.add(expProp);
}
}
return list.toArray(new ExportedProperty[list.size()]);
}
/**
* Find the matching foreignDbColumn for a given local property.
*/
private ExportedProperty findMatch(boolean embeddedProp, BeanProperty prop) {
String matchColumn = prop.getDbColumn();
String searchTable = tableJoin.getTable();
TableJoinColumn[] columns = tableJoin.columns();
for (int i = 0; i < columns.length; i++) {
String matchTo = columns[i].getLocalDbColumn();
if (matchColumn.equalsIgnoreCase(matchTo)) {
String foreignCol = columns[i].getForeignDbColumn();
return new ExportedProperty(embeddedProp, foreignCol, prop);
}
}
String msg = "Error with the Join on [" + getFullBeanName()
+ "]. Could not find the matching foreign key for [" + matchColumn + "] in table[" + searchTable + "]?"
+ " Perhaps using a @JoinColumn with the name/referencedColumnName attributes swapped?";
throw new PersistenceException(msg);
}
@Override
public void appendSelect(DbSqlContext ctx, boolean subQuery) {
if (!isTransient) {
localHelp.appendSelect(ctx, subQuery);
}
}
@Override
public void appendFrom(DbSqlContext ctx, SqlJoinType joinType) {
if (!isTransient) {
localHelp.appendFrom(ctx, joinType);
}
}
@Override
public Object readSet(DbReadContext ctx, EntityBean bean) throws SQLException {
return localHelp.readSet(ctx, bean);
}
/**
* Read the data from the resultSet effectively ignoring it and returning null.
*/
@Override
public Object read(DbReadContext ctx) throws SQLException {
// just read the resultSet incrementing the column index
// pass in null for the bean so any data read is ignored
return localHelp.read(ctx);
}
@Override
public void setValue(EntityBean bean, Object value) {
super.setValue(bean, value);
if (embedded && value instanceof EntityBean) {
setEmbeddedOwner(bean, value);
}
}
/**
* Set the owner on the embedded bean property.
*/
void setEmbeddedOwner(EntityBean owner) {
Object emb = getValue(owner);
if (emb != null) {
setEmbeddedOwner(owner, emb);
}
}
private void setEmbeddedOwner(EntityBean bean, Object value) {
((EntityBean)value)._ebean_getIntercept().setEmbeddedOwner(bean, propertyIndex);
}
@Override
public void setValueIntercept(EntityBean bean, Object value) {
super.setValueIntercept(bean, value);
if (embedded && value instanceof EntityBean) {
setEmbeddedOwner(bean, value);
}
}
@Override
public void loadIgnore(DbReadContext ctx) {
localHelp.loadIgnore(ctx);
}
@Override
public void load(SqlBeanLoad sqlBeanLoad) {
Object dbVal = sqlBeanLoad.load(this);
if (embedded && sqlBeanLoad.isLazyLoad()) {
if (dbVal instanceof EntityBean) {
((EntityBean) dbVal)._ebean_getIntercept().setLoaded();
}
}
}
private AssocOneHelp createHelp(boolean embedded, boolean oneToOneExported) {
if (embedded) {
return new AssocOneHelpEmbedded(this);
} else if (oneToOneExported) {
return new AssocOneHelpRefExported(this);
} else {
if (targetInheritInfo != null) {
return new AssocOneHelpRefInherit(this);
} else {
return new AssocOneHelpRefSimple(this);
}
}
}
@Override
public void jsonWrite(WriteJson writeJson, EntityBean bean) throws IOException {
if (!jsonSerialize) {
return;
}
Object value = getValueIntercept(bean);
if (value == null) {
writeJson.writeNullField(name);
} else {
//noinspection StatementWithEmptyBody
if (writeJson.isParentBean(value)) {
// bi-directional and already rendered parent
} else {
// Hmmm, not writing complex non-entity bean
if (value instanceof EntityBean) {
writeJson.beginAssocOne(name, bean);
BeanDescriptor refDesc = descriptor.getBeanDescriptor(value.getClass());
refDesc.jsonWrite(writeJson, (EntityBean) value, name);
writeJson.endAssocOne();
}
}
}
}
@Override
public void jsonRead(ReadJson readJson, EntityBean bean) throws IOException {
if (jsonDeserialize && targetDescriptor != null) {
T assocBean = targetDescriptor.jsonRead(readJson, name);
setValue(bean, assocBean);
}
}
public boolean isReference(Object detailBean) {
EntityBean eb = (EntityBean) detailBean;
return targetDescriptor.isReference(eb._ebean_getIntercept());
}
/**
* Set the parent bean to the child bean if it has not already been set.
*/
public void setParentBeanToChild(EntityBean parent, EntityBean child) {
if (mappedBy != null) {
BeanProperty beanProperty = targetDescriptor.getBeanProperty(mappedBy);
if (beanProperty != null && beanProperty.getValue(child) == null) {
// set the 'parent' bean to the 'child' bean
beanProperty.setValue(child, parent);
}
}
}
}
