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The ACT full stack MVC framework
package act.db.di;
/*-
* #%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.Act;
import act.app.ActionContext;
import act.app.App;
import act.cli.CliContext;
import act.db.Dao;
import act.inject.SessionVariable;
import act.inject.param.JsonDto;
import act.inject.param.ParamValueLoaderService;
import act.util.ActContext;
import act.view.ActBadRequest;
import act.view.ActNotFound;
import org.osgl.$;
import org.osgl.inject.ValueLoader;
import org.osgl.util.*;
import java.util.ArrayList;
import java.util.Collection;
import javax.validation.constraints.NotNull;
public class FindBy extends ValueLoader.Base {
private String requestParamName;
private String queryFieldName;
private Dao dao;
private StringValueResolver resolver;
private boolean findOne;
private boolean byId;
private Class rawType;
private boolean notNull;
private String onetimeValue;
private boolean isSessionVariable;
private String sessionVarName;
@Override
protected void initialized() {
App app = App.instance();
rawType = spec.rawType();
notNull = spec.hasAnnotation(NotNull.class);
findOne = !(Iterable.class.isAssignableFrom(rawType));
dao = app.dbServiceManager().dao(findOne ? rawType : (Class) spec.typeParams().get(0));
queryFieldName = S.string(options.get("field"));
byId = findOne && S.blank(queryFieldName) && (Boolean) options.get("byId");
resolver = app.resolverManager().resolver(byId ? dao.idType() : (Class) options.get("fieldType"));
if (null == resolver) {
throw new IllegalArgumentException("Cannot find String value resolver for type: " + dao.idType());
}
requestParamName = S.string(value());
if (S.blank(requestParamName)) {
requestParamName = ParamValueLoaderService.bindName(spec);
}
if (!byId) {
if (S.blank(queryFieldName)) {
queryFieldName = requestParamName;
}
}
SessionVariable sessionVariable = spec.getAnnotation(SessionVariable.class);
if (null != sessionVariable) {
isSessionVariable = true;
sessionVarName = sessionVariable.value();
if (S.blank(sessionVarName)) {
sessionVarName = requestParamName;
}
}
}
public void setOnetimeValue(String s) {
onetimeValue = s;
}
@Override
public Object get() {
ActContext ctx = ActContext.Base.currentContext();
E.illegalStateIf(null == ctx);
String value = rawValue(ctx);
onetimeValue = null;
if (S.empty(value)) {
if (findOne) {
return ensureNotNull(null, value, ctx);
}
}
Object by = null == value ? null : resolver.resolve(value);
if (findOne) ensureNotNull(by, value, ctx);
Collection col = null;
if (!findOne) {
if (rawType.equals(Iterable.class)) {
if (S.empty(value)) {
return dao.findAll();
} else {
col = new ArrayList();
}
} else {
col = (Collection) App.instance().getInstance(rawType);
}
}
if (null == by) {
return null;
}
if (byId) {
Object bean = dao.findById(by);
return ensureNotNull(bean, value, ctx);
} else {
if (findOne) {
Object found = dao.findOneBy(Keyword.of(queryFieldName).javaVariable(), by);
if (null == found) {
// try find by id anyway
try {
found = dao.findById(by);
} catch (Exception e) {
// ignore
}
}
return ensureNotNull(found, value, ctx);
} else {
if (S.empty(value)) {
col.addAll(dao.findAllAsList());
} else {
col.addAll(C.list(dao.findBy(Keyword.of(queryFieldName).javaVariable(), by)));
}
return col;
}
}
}
private String rawValue(ActContext ctx) {
if (null != onetimeValue) {
return onetimeValue;
}
if (isSessionVariable) {
if (ctx instanceof ActionContext) {
ActionContext actionContext = $.cast(ctx);
return actionContext.session(sessionVarName);
} else if (ctx instanceof CliContext) {
CliContext cliContext = $.cast(ctx);
return cliContext.session(sessionVarName);
}
throw E.unsupport();
}
return resolve(requestParamName, ctx);
}
private Object ensureNotNull(Object obj, String value, ActContext ctx) {
if (notNull) {
if (null == value) {
String errMsg = Act.appConfig().i18nEnabled() ? ctx._act_i18n("e400.db_bind.missing_request_param", requestParamName) : "missing required parameter: " + requestParamName;
throw ActBadRequest.create(errMsg);
}
if (null == obj) {
String errMsg = Act.appConfig().i18nEnabled() ? ctx._act_i18n("e404.db_bind.not_found", queryFieldName, value) : "db record not found by " + queryFieldName + " using value: " + value;
throw ActNotFound.create(errMsg);
}
}
return obj;
}
private static String resolve(String bindName, ActContext ctx) {
String value = ctx.paramVal(bindName);
if (S.notEmpty(value)) {
return value;
}
if (ctx instanceof ActionContext) {
ActionContext actionContext = (ActionContext) ctx;
JsonDto dto = actionContext.attribute(JsonDto.CTX_ATTR_KEY);
if (null != dto) {
value = S.string(dto.get(bindName));
}
}
if (S.notEmpty(value)) {
return value;
}
Keyword keyword = Keyword.of(bindName);
if (keyword.tokens().size() > 1) {
return resolve(keyword, ctx);
} else {
keyword = Keyword.of(bindName + " id");
return resolve(keyword, ctx);
}
}
private static String resolve(Keyword keyword, ActContext ctx) {
String value = ctx.paramVal(keyword.underscore());
if (S.notBlank(value)) {
return value;
}
value = ctx.paramVal(keyword.javaVariable());
if (S.notBlank(value)) {
return value;
}
return null;
}
}