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| /build |
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| # Simple Object Storage | ||
|
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| This is a Java library, that allows you to store/persist and retrieve objects. | ||
| The library's only dependency is gson, which is used for object serialization. | ||
| The core idea was to have a clean storage API that keeps things as simple as possible. | ||
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| ## API | ||
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| ## FAQ | ||
| - Are there any limitations? | ||
| The library lazy loads the object from the file into memory. | ||
| There is no logic to prevent OutOfMemoryExceptions. | ||
| In short: if you try to load a huge file and your machine has not enough memory, this library will crash. | ||
| This lib's core feature is simplicity, if you want a full fledged database that can query objects from | ||
| a large database it might be better to use something like SQLite. | ||
| The lib has been tested and works great for collections of +-500'000 objects. | ||
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| - Can this library be used on Android? | ||
| Yes. The main reason for its creation was the lack of a simple object storage on Android. | ||
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| - How fast is the storage? | ||
| This of course depends on what you are trying to do. | ||
| In general after its first read from disk all objects are stored in memory (lazy load), | ||
| which makes subsequent access blazing fast. | ||
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| - Is this an ORM? | ||
| No, there is no conversion to a relational representation of the object. | ||
| The object is serialized in an object oriented format (JSON). | ||
| But it solves the same problem like an ORM (persisting Java Objects). | ||
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| - Nothing is synchronous, I want my object now! What can I do? | ||
| Reading from disk is expensive and can encounter issues (like no permission to read or no file). | ||
| That's the reason why the library is completely asynchronous and works with callbacks. |
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| apply plugin: 'com.android.library' | ||
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| android { | ||
| compileSdkVersion 23 | ||
| buildToolsVersion "23.0.2" | ||
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| defaultConfig { | ||
| minSdkVersion 8 | ||
| targetSdkVersion 23 | ||
| versionCode 1 | ||
| versionName "1.0" | ||
| testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" | ||
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| } | ||
| buildTypes { | ||
| release { | ||
| minifyEnabled false | ||
| proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' | ||
| } | ||
| } | ||
| } | ||
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| dependencies { | ||
| compile fileTree(dir: 'libs', include: ['*.jar']) | ||
| testCompile 'junit:junit:4.12' | ||
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| androidTestCompile 'com.android.support:support-annotations:23.0.1' | ||
| androidTestCompile 'com.android.support.test:runner:0.4.1' | ||
| androidTestCompile 'com.android.support.test:rules:0.4.1' | ||
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| compile 'com.google.code.gson:gson:2.5' | ||
| compile 'com.android.support:appcompat-v7:23.1.1' | ||
| } |
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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <module external.linked.project.id=":objectstorage" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="ObjectStorage" external.system.module.version="unspecified" type="JAVA_MODULE" version="4"> | ||
| <component name="FacetManager"> | ||
| <facet type="android-gradle" name="Android-Gradle"> | ||
| <configuration> | ||
| <option name="GRADLE_PROJECT_PATH" value=":objectstorage" /> | ||
| </configuration> | ||
| </facet> | ||
| <facet type="android" name="Android"> | ||
| <configuration> | ||
| <option name="SELECTED_BUILD_VARIANT" value="debug" /> | ||
| <option name="SELECTED_TEST_ARTIFACT" value="_android_test_" /> | ||
| <option name="ASSEMBLE_TASK_NAME" value="assembleDebug" /> | ||
| <option name="COMPILE_JAVA_TASK_NAME" value="compileDebugSources" /> | ||
| <afterSyncTasks> | ||
| <task>generateDebugSources</task> | ||
| </afterSyncTasks> | ||
| <option name="ALLOW_USER_CONFIGURATION" value="false" /> | ||
| <option name="MANIFEST_FILE_RELATIVE_PATH" value="/src/main/AndroidManifest.xml" /> | ||
| <option name="RES_FOLDER_RELATIVE_PATH" value="/src/main/res" /> | ||
| <option name="RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/main/res" /> | ||
| <option name="ASSETS_FOLDER_RELATIVE_PATH" value="/src/main/assets" /> | ||
| <option name="LIBRARY_PROJECT" value="true" /> | ||
| </configuration> | ||
| </facet> | ||
| </component> | ||
| <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="false"> | ||
| <output url="file://$MODULE_DIR$/build/intermediates/classes/debug" /> | ||
| <output-test url="file://$MODULE_DIR$/build/intermediates/classes/test/debug" /> | ||
| <exclude-output /> | ||
| <content url="file://$MODULE_DIR$"> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/r/debug" isTestSource="false" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/debug" isTestSource="false" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/debug" isTestSource="false" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/debug" isTestSource="false" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/debug" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/debug" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/r/androidTest/debug" isTestSource="true" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/androidTest/debug" isTestSource="true" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/androidTest/debug" isTestSource="true" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/androidTest/debug" isTestSource="true" generated="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/androidTest/debug" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/androidTest/debug" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/res" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/resources" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/assets" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/aidl" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/java" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/jni" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/debug/rs" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/res" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/resources" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/assets" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/aidl" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/java" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/jni" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/testDebug/rs" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/res" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/assets" type="java-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/aidl" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/jni" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/main/rs" isTestSource="false" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/res" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/resources" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/assets" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/aidl" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/jni" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/test/rs" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/res" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/resources" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/assets" type="java-test-resource" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/aidl" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/java" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/jni" isTestSource="true" /> | ||
| <sourceFolder url="file://$MODULE_DIR$/src/androidTest/rs" isTestSource="true" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/annotations" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/blame" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/bundles" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support.test/exposed-instrumentation-api-publish/0.4.1/jars" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support.test/rules/0.4.1/jars" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support.test/runner/0.4.1/jars" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/appcompat-v7/23.1.1/jars" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/support-v4/23.1.1/jars" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jniLibs" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/lint" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/res" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/rs" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/intermediates/transforms" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/outputs" /> | ||
| <excludeFolder url="file://$MODULE_DIR$/build/tmp" /> | ||
| </content> | ||
| <orderEntry type="jdk" jdkName="Android API 23 Platform" jdkType="Android SDK" /> | ||
| <orderEntry type="sourceFolder" forTests="false" /> | ||
| <orderEntry type="library" exported="" name="support-annotations-23.1.1" level="project" /> | ||
| <orderEntry type="library" exported="" name="support-v4-23.1.1" level="project" /> | ||
| <orderEntry type="library" exported="" name="appcompat-v7-23.1.1" level="project" /> | ||
| <orderEntry type="library" exported="" scope="TEST" name="rules-0.4.1" level="project" /> | ||
| <orderEntry type="library" exported="" scope="TEST" name="exposed-instrumentation-api-publish-0.4.1" level="project" /> | ||
| <orderEntry type="library" exported="" scope="TEST" name="runner-0.4.1" level="project" /> | ||
| <orderEntry type="library" exported="" scope="TEST" name="hamcrest-core-1.3" level="project" /> | ||
| <orderEntry type="library" exported="" scope="TEST" name="junit-4.12" level="project" /> | ||
| <orderEntry type="library" exported="" name="gson-2.5" level="project" /> | ||
| </component> | ||
| </module> |
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| # Add project specific ProGuard rules here. | ||
| # By default, the flags in this file are appended to flags specified | ||
| # in /Applications/AndroidDevelopment/sdk/tools/proguard/proguard-android.txt | ||
| # You can edit the include path and order by changing the proguardFiles | ||
| # directive in build.gradle. | ||
| # | ||
| # For more details, see | ||
| # http://developer.android.com/guide/developing/tools/proguard.html | ||
|
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| # Add any project specific keep options here: | ||
|
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| # If your project uses WebView with JS, uncomment the following | ||
| # and specify the fully qualified class name to the JavaScript interface | ||
| # class: | ||
| #-keepclassmembers class fqcn.of.javascript.interface.for.webview { | ||
| # public *; | ||
| #} |
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| <manifest xmlns:android="http://schemas.android.com/apk/res/android" | ||
| package="ch.papers.objectstorage"> | ||
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| <application | ||
| android:allowBackup="true" | ||
| android:label="@string/app_name" | ||
| android:supportsRtl="true"> | ||
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| </application> | ||
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| </manifest> |
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| package ch.papers.objectstorage; | ||
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| import com.google.gson.Gson; | ||
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| /** | ||
| * Created by Alessandro De Carli (@a_d_c_) on 15/11/15. | ||
| * Papers.ch | ||
| * [email protected] | ||
| */ | ||
| public class Constants { | ||
| public static final Gson GSON = new Gson(); | ||
| public static final String SUCCESS_MESSAGE = "success"; | ||
| } |
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src/main/java/ch/papers/objectstorage/UuidObjectMapType.java
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| package ch.papers.objectstorage; | ||
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| import java.lang.reflect.ParameterizedType; | ||
| import java.lang.reflect.Type; | ||
| import java.util.Map; | ||
| import java.util.UUID; | ||
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| import ch.papers.objectstorage.models.UuidObject; | ||
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| /** | ||
| * Created by Alessandro De Carli (@a_d_c_) on 05/12/15. | ||
| * Papers.ch | ||
| * [email protected] | ||
| */ | ||
| public class UuidObjectMapType implements ParameterizedType { | ||
| private Class<? extends UuidObject> wrapped; | ||
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| public UuidObjectMapType(Class<? extends UuidObject> wrapper) { | ||
| this.wrapped = wrapper; | ||
| } | ||
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| @Override | ||
| public Type[] getActualTypeArguments() { | ||
| return new Type[]{UUID.class,wrapped}; | ||
| } | ||
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| @Override | ||
| public Type getRawType() { | ||
| return Map.class; | ||
| } | ||
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| @Override | ||
| public Type getOwnerType() { | ||
| return null; | ||
| } | ||
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| } |
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