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DataPropertyRepository.java
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package act.data;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import act.app.App;
import act.app.AppServiceBase;
import act.util.ActContext;
import act.util.PropertySpec;
import org.joda.time.*;
import org.osgl.$;
import org.osgl.logging.LogManager;
import org.osgl.logging.Logger;
import org.osgl.util.C;
import org.rythmengine.utils.S;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
/**
* Keep the property information of Data class
*/
public class DataPropertyRepository extends AppServiceBase<DataPropertyRepository> {
private static final Logger LOGGER = LogManager.get(DataPropertyRepository.class);
/**
* all classes that can NOT be decomposed in terms of get properties
*/
private Set<Class> terminators;
/**
* name of terminator classes.
*/
private Set<String> extendedTerminators;
/**
* Map a list of property path to class name
*/
private Map<String, List<String>> repo = C.newMap();
private OutputFieldsCache outputFieldsCache = new OutputFieldsCache();
public DataPropertyRepository(App app) {
super(app, true);
_init();
}
@Override
protected void releaseResources() {
extendedTerminators.clear();
terminators.clear();
repo.clear();
}
/**
* Returns the complete property list of a class
* @param c the class
* @return the property list of the class
*/
public synchronized List<String> propertyListOf(Class<?> c) {
String cn = c.getName();
List<String> ls = repo.get(cn);
if (ls != null) {
return ls;
}
ls = buildPropertyList(c);
repo.put(cn, ls);
return ls;
}
public List<String> outputFields(PropertySpec.MetaInfo spec, Class<?> componentClass, ActContext context) {
return outputFieldsCache.getOutputFields(spec, componentClass, context);
}
private List<String> buildPropertyList(Class c) {
Method[] ma = c.getMethods();
String context = "";
List<String> retLst = C.newList();
for (Method m: ma) {
buildPropertyPath(context, m, retLst);
}
return retLst;
}
private void buildPropertyPath(String context, Method m, List<String> repo) {
if (m.getParameterTypes().length > 0) {
return;
}
String name = m.getName();
if ("getClass".equals(name)) {
return;
}
String propName = "";
if (name.startsWith("get")) {
propName = getPropName(name);
} else if (name.startsWith("is")) {
propName = isPropName(name);
}
if (S.isEmpty(propName)) {
return;
}
Class c = m.getReturnType();
if (Class.class.equals(c)) {
return;
}
if (c.isArray()) {
Class componentType = c.getComponentType();
List<String> retTypeProperties = propertyListOf(componentType);
context = context + propName + ".";
for (String s: retTypeProperties) {
repo.add(context + s);
}
return;
}
if ($.isSimpleType(c)) {
repo.add(context + propName);
return;
}
if (Iterable.class.isAssignableFrom(c)) {
Type t = m.getGenericReturnType();
if (t instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) t;
Type[] ta = pt.getActualTypeArguments();
for (Type t0: ta) {
Class<?> c0 = (Class) t0;
List<String> retTypeProperties = propertyListOf(c0);
context = context + propName + ".";
for (String s: retTypeProperties) {
repo.add(context + s);
}
}
}
return;
}
if (terminators.contains(c) || extendedTerminators.contains(c.getName())) {
repo.add(context + propName);
return;
}
List<String> retTypeProperties = propertyListOf(c);
context = context + propName + ".";
for (String s : retTypeProperties) {
repo.add(context + s);
}
}
private static String getPropName(String name) {
return S.lowerFirst(name.substring(3));
}
private static String isPropName(String name) {
return S.lowerFirst(name.substring(2));
}
private void _init() {
Set<Class> s = C.newSet();
s.add(BigDecimal.class);
s.add(BigInteger.class);
s.add(Date.class);
s.add(java.sql.Date.class);
s.add(Calendar.class);
s.add(DateTime.class);
s.add(Instant.class);
s.add(LocalDate.class);
s.add(LocalDateTime.class);
s.add(LocalTime.class);
terminators = s;
Set<String> s0 = C.newSet();
for (Class c: s) {
s0.add(c.getName());
}
s0.add("java.time.Instant");
s0.add("java.time.LocalTime");
s0.add("java.time.LocalDate");
s0.add("java.time.LocalDateTime");
s0.add("org.bson.types.ObjectId");
extendedTerminators = s0;
}
}