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authorRafael Guterres <guterresrafael@gmail.com>2015-11-21 01:57:46 -0200
committerRafael Guterres <guterresrafael@gmail.com>2015-11-21 01:57:46 -0200
commitf5a266953e53a7f1785bcb584759582621ec9de3 (patch)
tree06aed01befc06db1384d731d5d17ee897335c302 /src/org/traccar/web/BaseServletResource.java
parentcfe237cf26c6309b8431b3b81d589628ae363804 (diff)
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Add support to generic resources and refactor in classes to support types and commandpattern.
Diffstat (limited to 'src/org/traccar/web/BaseServletResource.java')
-rw-r--r--src/org/traccar/web/BaseServletResource.java169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/org/traccar/web/BaseServletResource.java b/src/org/traccar/web/BaseServletResource.java
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index 000000000..318f0d7b6
--- /dev/null
+++ b/src/org/traccar/web/BaseServletResource.java
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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.
+ */
+package org.traccar.web;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.traccar.Context;
+import org.traccar.helper.CommandCall;
+import org.traccar.helper.Clazz;
+
+/**
+ *
+ * @author Rafael
+ */
+public abstract class BaseServletResource<T> extends BaseServlet {
+
+ private final Class<T> clazz = Clazz.getGenericArgumentType(getClass());
+
+ public static final String GET = "GET";
+ public static final String POST = "POST";
+ public static final String PUT = "PUT";
+ public static final String DELETE = "DELETE";
+
+ public static final String PATH_PARAM_ID = "/\\d";
+ public static final String SLASH = "/";
+ public static final String VOID = "";
+
+ @Override
+ protected String getCommand(HttpServletRequest req) {
+ String command = req.getPathInfo();
+ if (command == null || command.matches(PATH_PARAM_ID)) {
+ switch (req.getMethod()) {
+ case GET:
+ command = "/get";
+ break;
+ case POST:
+ command = "/add";
+ break;
+ case PUT:
+ command = "/update";
+ break;
+ case DELETE:
+ command = "/remove";
+ break;
+ default:
+ command = "";
+ }
+ }
+ return command;
+ }
+
+ protected String getPathParamId(String pathInfo) {
+ if (pathInfo != null && pathInfo.matches(PATH_PARAM_ID)) {
+ return pathInfo.replaceAll(SLASH, VOID);
+ }
+ return null;
+ }
+
+ protected abstract void get(HttpServletRequest req, HttpServletResponse resp) throws Exception;
+
+ protected void add(HttpServletRequest req, HttpServletResponse resp) throws Exception {
+ add(req, resp, null);
+ }
+
+ protected void update(HttpServletRequest req, HttpServletResponse resp) throws Exception {
+ update(req, resp, null);
+ }
+
+ protected void remove(HttpServletRequest req, HttpServletResponse resp) throws Exception {
+ remove(req, resp, null);
+ }
+
+ protected void add(HttpServletRequest req, HttpServletResponse resp, CommandCall<T> commandCall) throws Exception {
+ if (commandCall != null) {
+ commandCall.before();
+ }
+
+ T entity = JsonConverter.objectFromJson(req.getReader(), this.clazz);
+ long userId = getUserId(req);
+ if (commandCall != null) {
+ commandCall.setUserId(userId);
+ commandCall.setEntity(entity);
+ commandCall.check();
+ }
+
+ Context.getDataManager().add(entity);
+
+ long entityId = Clazz.getId(entity);
+ Context.getDataManager().link(this.clazz, userId, entityId);
+
+ if (commandCall != null) {
+ commandCall.after();
+ }
+
+ sendResponse(resp.getWriter(), JsonConverter.objectToJson(entity));
+ }
+
+ protected void update(HttpServletRequest req, HttpServletResponse resp,
+ CommandCall<T> commandCall) throws Exception {
+ if (commandCall != null) {
+ commandCall.before();
+ }
+
+ T entity = JsonConverter.objectFromJson(req.getReader(), this.clazz);
+ String entityId = getPathParamId(req.getPathInfo());
+ if (entityId != null) {
+ Clazz.setId(entity, Long.parseLong(entityId));
+ }
+ long userId = getUserId(req);
+
+ if (commandCall != null) {
+ commandCall.setUserId(userId);
+ commandCall.setEntity(entity);
+ commandCall.check();
+ }
+
+ Context.getDataManager().update(entity);
+
+ if (commandCall != null) {
+ commandCall.after();
+ }
+
+ sendResponse(resp.getWriter(), true);
+ }
+
+ protected void remove(HttpServletRequest req, HttpServletResponse resp,
+ CommandCall<T> commandCall) throws Exception {
+ if (commandCall != null) {
+ commandCall.before();
+ }
+
+ T entity = Clazz.newInstance(this.clazz);
+ String entityId = getPathParamId(req.getPathInfo());
+ if (entityId != null) {
+ Clazz.setId(entity, Long.parseLong(entityId));
+ } else {
+ entity = JsonConverter.objectFromJson(req.getReader(), this.clazz);
+ }
+ long userId = getUserId(req);
+
+ if (commandCall != null) {
+ commandCall.setUserId(userId);
+ commandCall.setEntity(entity);
+ commandCall.check();
+ }
+
+ Context.getDataManager().remove(entity);
+
+ if (commandCall != null) {
+ commandCall.after();
+ }
+
+ sendResponse(resp.getWriter(), true);
+ }
+
+}