io.ebeaninternal.server.deploy.BeanMapHelp Maven / Gradle / Ivy
package io.ebeaninternal.server.deploy;
import io.ebean.EbeanServer;
import io.ebean.Query;
import io.ebean.Transaction;
import io.ebean.bean.BeanCollection;
import io.ebean.bean.BeanCollectionAdd;
import io.ebean.bean.EntityBean;
import io.ebean.common.BeanMap;
import io.ebeaninternal.api.json.SpiJsonWriter;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
/**
* Helper specifically for dealing with Maps.
*/
public class BeanMapHelp extends BaseCollectionHelp {
private final BeanPropertyAssocMany many;
private final BeanDescriptor targetDescriptor;
private final String propertyName;
private final BeanProperty beanProperty;
/**
* When created for a given query that will return a map.
*/
BeanMapHelp(BeanDescriptor targetDescriptor, String mapKey) {
this.targetDescriptor = targetDescriptor;
this.beanProperty = targetDescriptor.getBeanProperty(mapKey);
this.many = null;
this.propertyName = null;
}
/**
* When help is attached to a specific many property.
*/
BeanMapHelp(BeanPropertyAssocMany many) {
this.many = many;
this.targetDescriptor = many.getTargetDescriptor();
this.propertyName = many.getName();
this.beanProperty = targetDescriptor.getBeanProperty(many.getMapKey());
}
@Override
@SuppressWarnings("unchecked")
public BeanCollectionAdd getBeanCollectionAdd(Object bc, String mapKey) {
if (mapKey == null) {
mapKey = many.getMapKey();
}
BeanProperty beanProp = targetDescriptor.getBeanProperty(mapKey);
if (bc instanceof BeanMap) {
BeanMap bm = (BeanMap) bc;
Map actualMap = bm.getActualMap();
if (actualMap == null) {
actualMap = new LinkedHashMap<>();
bm.setActualMap(actualMap);
}
return new Adder(beanProp, actualMap);
} else {
throw new RuntimeException("Unhandled type " + bc);
}
}
static class Adder implements BeanCollectionAdd {
private final BeanProperty beanProperty;
private final Map map;
Adder(BeanProperty beanProperty, Map map) {
this.beanProperty = beanProperty;
this.map = map;
}
@Override
public void addEntityBean(EntityBean bean) {
Object keyValue = beanProperty.getValue(bean);
map.put(keyValue, bean);
}
}
@Override
public BeanCollection createEmptyNoParent() {
return new BeanMap<>();
}
@Override
public BeanCollection createEmpty(EntityBean ownerBean) {
BeanMap beanMap = new BeanMap<>(loader, ownerBean, propertyName);
if (many != null) {
beanMap.setModifyListening(many.getModifyListenMode());
}
return beanMap;
}
@Override
public void add(BeanCollection collection, EntityBean bean, boolean withCheck) {
if (bean == null) {
((BeanMap) collection).internalPutNull();
} else {
Object keyValue = beanProperty.getValueIntercept(bean);
BeanMap map = ((BeanMap) collection);
map.internalPutWithCheck(keyValue, bean);
}
}
@Override
@SuppressWarnings({"unchecked", "rawtypes"})
public BeanCollection createReference(EntityBean parentBean) {
BeanMap beanMap = new BeanMap(loader, parentBean, propertyName);
if (many != null) {
beanMap.setModifyListening(many.getModifyListenMode());
}
return beanMap;
}
@Override
public void refresh(EbeanServer server, Query query, Transaction t, EntityBean parentBean) {
BeanMap newBeanMap = (BeanMap) server.findMap(query, t);
refresh(newBeanMap, parentBean);
}
@Override
public void refresh(BeanCollection bc, EntityBean parentBean) {
BeanMap newBeanMap = (BeanMap) bc;
Map current = (Map) many.getValue(parentBean);
newBeanMap.setModifyListening(many.getModifyListenMode());
if (current == null) {
// the currentMap is null? Not really expecting this...
many.setValue(parentBean, newBeanMap);
} else if (current instanceof BeanMap) {
// normally this case, replace just the underlying list
BeanMap currentBeanMap = (BeanMap) current;
currentBeanMap.setActualMap(newBeanMap.getActualMap());
currentBeanMap.setModifyListening(many.getModifyListenMode());
} else {
// replace the entire set
many.setValue(parentBean, newBeanMap);
}
}
@Override
public void jsonWrite(SpiJsonWriter ctx, String name, Object collection, boolean explicitInclude) throws IOException {
Map map;
if (collection instanceof BeanCollection) {
BeanMap bc = (BeanMap) collection;
if (!bc.isPopulated()) {
if (explicitInclude) {
// invoke lazy loading as collection
// is explicitly included in the output
bc.size();
} else {
return;
}
}
map = bc.getActualMap();
} else {
map = (Map) collection;
}
if (!map.isEmpty() || ctx.isIncludeEmpty()) {
ctx.beginAssocMany(name);
for (Entry entry : map.entrySet()) {
many.jsonWriteMapEntry(ctx, entry);
}
ctx.endAssocMany();
}
}
}