Mercurial > hg > orthanc-java
diff Plugin/JavaLocalObject.cpp @ 7:b14ed1ea3a23
reorganization
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 19 Oct 2023 11:14:45 +0200 |
parents | |
children | 1c407ba1d311 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Plugin/JavaLocalObject.cpp Thu Oct 19 11:14:45 2023 +0200 @@ -0,0 +1,107 @@ +/** + * SPDX-FileCopyrightText: 2023 Sebastien Jodogne, UCLouvain, Belgium + * SPDX-License-Identifier: GPL-3.0-or-later + */ + +/** + * Java plugin for Orthanc + * Copyright (C) 2023 Sebastien Jodogne, UCLouvain, Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "JavaLocalObject.h" + +#include <memory> +#include <stdexcept> + + +JavaLocalObject::JavaLocalObject(JavaEnvironment& env, + jobject obj, + bool objCanBeNull) : + env_(&env.GetValue()), + obj_(obj) +{ + if (!objCanBeNull && obj == NULL) + { + throw std::runtime_error("Null pointer"); + } +} + + +JavaLocalObject::~JavaLocalObject() +{ + env_->DeleteLocalRef(obj_); +} + + +JavaLocalObject* JavaLocalObject::CreateArrayOfStrings(JavaEnvironment& env, + const std::vector<std::string>& items) +{ + JavaLocalObject emptyString(env, env.GetValue().NewStringUTF("")); + + jobjectArray obj = env.GetValue().NewObjectArray( + items.size(), env.GetValue().FindClass("java/lang/String"), + emptyString.GetValue()); + + if (obj == NULL) + { + throw std::runtime_error("Cannot create an array of Java strings"); + } + else + { + std::unique_ptr<JavaLocalObject> result(new JavaLocalObject(env, obj)); + + for (size_t i = 0; i < items.size(); i++) + { + JavaLocalObject item(env, env.GetValue().NewStringUTF(items[i].c_str())); + env.GetValue().SetObjectArrayElement(obj, i, item.GetValue()); + } + + return result.release(); + } +} + + +JavaLocalObject* JavaLocalObject::CreateDictionary(JavaEnvironment& env, + const std::map<std::string, std::string>& items) +{ + // NB: In JNI, there are no generics. All the templated arguments + // are taken as instances of the "Object" base class. + + jclass cls = env.FindClass("java/util/HashMap"); + jmethodID constructor = env.GetMethodID(cls, "<init>", "()V"); + jmethodID setter = env.GetMethodID(cls, "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"); + jobject obj = env.GetValue().NewObject(cls, constructor); + + if (obj == NULL) + { + throw std::runtime_error("Cannot create a Java dictionary"); + } + else + { + std::unique_ptr<JavaLocalObject> result(new JavaLocalObject(env, obj)); + + for (std::map<std::string, std::string>::const_iterator it = items.begin(); it != items.end(); ++it) + { + JavaLocalObject key(env, env.GetValue().NewStringUTF(it->first.c_str())); + JavaLocalObject value(env, env.GetValue().NewStringUTF(it->second.c_str())); + JavaLocalObject previousValue(env, env.GetValue().CallObjectMethod(obj, setter, key.GetValue(), value.GetValue()), true); + env.CheckException(); + } + + return result.release(); + } +}