com.avaje.ebeaninternal.server.deploy.ChainedBeanPersistController Maven / Gradle / Ivy
package com.avaje.ebeaninternal.server.deploy;
import com.avaje.ebean.event.BeanPersistController;
import com.avaje.ebean.event.BeanPersistRequest;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
/**
* Chains multiple BeanPersistController's together.
*
* Used when multiple BeanPersistController register for the same bean type.
*/
public class ChainedBeanPersistController implements BeanPersistController {
private static final Sorter SORTER = new Sorter();
private final List list;
private final BeanPersistController[] chain;
/**
* Construct adding 2 BeanPersistController's.
*/
public ChainedBeanPersistController(BeanPersistController c1, BeanPersistController c2) {
this(addList(c1, c2));
}
/**
* Helper method used to create a list from 2 BeanPersistController's.
*/
private static List addList(BeanPersistController c1, BeanPersistController c2) {
ArrayList addList = new ArrayList(2);
addList.add(c1);
addList.add(c2);
return addList;
}
/**
* Construct given the list of BeanPersistController's.
*/
public ChainedBeanPersistController(List list) {
this.list = list;
BeanPersistController[] c = list.toArray(new BeanPersistController[list.size()]);
Arrays.sort(c, SORTER);
this.chain = c;
}
/**
* Return the size of the chain.
*/
protected int size() {
return chain.length;
}
/**
* Register a new BeanPersistController and return the resulting chain.
*/
public ChainedBeanPersistController register(BeanPersistController c) {
if (list.contains(c)){
return this;
} else {
ArrayList newList = new ArrayList();
newList.addAll(list);
newList.add(c);
return new ChainedBeanPersistController(newList);
}
}
/**
* De-register a BeanPersistController and return the resulting chain.
*/
public ChainedBeanPersistController deregister(BeanPersistController c) {
if (!list.contains(c)){
return this;
} else {
ArrayList newList = new ArrayList();
newList.addAll(list);
newList.remove(c);
return new ChainedBeanPersistController(newList);
}
}
/**
* Always returns 0 (not used for this object).
*/
@Override
public int getExecutionOrder() {
return 0;
}
/**
* Always returns false (not used for this object).
*/
@Override
public boolean isRegisterFor(Class cls) {
return false;
}
@Override
public void postDelete(BeanPersistRequest request) {
for (int i = 0; i < chain.length; i++) {
chain[i].postDelete(request);
}
}
@Override
public void postInsert(BeanPersistRequest request) {
for (int i = 0; i < chain.length; i++) {
chain[i].postInsert(request);
}
}
@Override
public void postUpdate(BeanPersistRequest request) {
for (int i = 0; i < chain.length; i++) {
chain[i].postUpdate(request);
}
}
@Override
public boolean preDelete(BeanPersistRequest request) {
for (int i = 0; i < chain.length; i++) {
if (!chain[i].preDelete(request)) {
return false;
}
}
return true;
}
@Override
public boolean preInsert(BeanPersistRequest request) {
for (int i = 0; i < chain.length; i++) {
if (!chain[i].preInsert(request)) {
return false;
}
}
return true;
}
@Override
public boolean preUpdate(BeanPersistRequest request) {
for (int i = 0; i < chain.length; i++) {
if (!chain[i].preUpdate(request)) {
return false;
}
}
return true;
}
/**
* Helper to order the BeanPersistController's in a chain.
*/
private static class Sorter implements Comparator {
public int compare(BeanPersistController o1, BeanPersistController o2) {
int i1 = o1.getExecutionOrder() ;
int i2 = o2.getExecutionOrder() ;
return (i1