com.avaje.ebeaninternal.server.deploy.BeanPropertyAssocManyJsonHelp Maven / Gradle / Ivy
package com.avaje.ebeaninternal.server.deploy;
import com.avaje.ebean.bean.BeanCollection;
import com.avaje.ebean.bean.BeanCollectionAdd;
import com.avaje.ebean.bean.EntityBean;
import com.avaje.ebeaninternal.api.ClassUtil;
import com.avaje.ebeaninternal.server.text.json.ReadJson;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import java.io.IOException;
/**
* Help BeanPropertyAssocMany with JSON processing.
*/
public class BeanPropertyAssocManyJsonHelp {
/**
* The associated many property.
*/
private final BeanPropertyAssocMany many;
/**
* Helper used to read json for transient 'many' properties.
*/
private final BeanPropertyAssocManyJsonTransient jsonTransient;
/**
* Construct for the owning many property.
*/
public BeanPropertyAssocManyJsonHelp(BeanPropertyAssocMany many) {
this.many = many;
boolean objectMapperPresent = many.getBeanDescriptor().getServerConfig().getClassLoadConfig().isJacksonObjectMapperPresent();
this.jsonTransient = !objectMapperPresent ? null : new BeanPropertyAssocManyJsonTransient();
}
/**
* Read the JSON for this property.
*/
public void jsonRead(ReadJson readJson, EntityBean parentBean) throws IOException {
if (!this.many.jsonDeserialize) {
return;
}
JsonParser parser = readJson.getParser();
JsonToken event = parser.nextToken();
if (JsonToken.VALUE_NULL == event) {
return;
}
if (JsonToken.START_ARRAY != event) {
throw new JsonParseException("Unexpected token " + event + " - expecting start_array ", parser.getCurrentLocation());
}
if (many.isTransient()) {
jsonReadTransientUsingObjectMapper(readJson, parentBean);
return;
}
BeanCollection collection = many.createEmpty(parentBean);
BeanCollectionAdd add = many.getBeanCollectionAdd(collection, null);
do {
EntityBean detailBean = (EntityBean) many.targetDescriptor.jsonRead(readJson, many.name);
if (detailBean == null) {
// read the entire array
break;
}
add.addEntityBean(detailBean);
if (parentBean != null && many.childMasterProperty != null) {
// bind detail bean back to master via mappedBy property
many.childMasterProperty.setValue(detailBean, parentBean);
}
} while (true);
many.setValue(parentBean, collection);
}
/**
* Read a Transient property using Jackson ObjectMapper.
*/
private void jsonReadTransientUsingObjectMapper(ReadJson readJson, EntityBean parentBean) throws IOException {
if (jsonTransient == null) {
throw new IllegalStateException("Jackson ObjectMapper is required to read this Transient property "+many.getFullBeanName());
}
jsonTransient.jsonReadUsingObjectMapper(many, readJson, parentBean);
}
}