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160
engine/src/main/java/org/destinationsol/entitysystem/SerialisationManager.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| /* | ||
| * Copyright 2020 The Terasology Foundation | ||
| * | ||
| * 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.destinationsol.entitysystem; | ||
|
|
||
| import java.io.File; | ||
| import java.io.FileInputStream; | ||
| import java.io.FileOutputStream; | ||
| import java.io.IOException; | ||
| import java.lang.reflect.Field; | ||
| import java.util.Collection; | ||
|
|
||
| import com.google.common.collect.Lists; | ||
| import com.google.protobuf.ByteString; | ||
|
|
||
| import org.destinationsol.protobuf.EntityData; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.terasology.gestalt.assets.ResourceUrn; | ||
| import org.terasology.gestalt.entitysystem.component.Component; | ||
| import org.terasology.gestalt.entitysystem.entity.EntityManager; | ||
| import org.terasology.gestalt.entitysystem.entity.EntityRef; | ||
|
|
||
| public final class SerialisationManager { | ||
|
|
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| private static final Logger logger = LoggerFactory.getLogger(SerialisationManager.class); | ||
| private File file; | ||
| private EntityManager entityManager; | ||
| private ClassLoader classLoader; | ||
|
|
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| public SerialisationManager(String path, EntityManager entityManager, ClassLoader classLoader) { | ||
| file = new File(path); | ||
| this.entityManager = entityManager; | ||
| this.classLoader = classLoader; | ||
| } | ||
|
|
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| public void serialise() throws IllegalArgumentException, IllegalAccessException, IOException { | ||
|
|
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| EntityData.EntityStore.Builder storeBuilder = EntityData.EntityStore.newBuilder(); | ||
| for (EntityRef entity : entityManager.allEntities()) { | ||
| if (entity.getId() == -1) { | ||
| break; | ||
| } | ||
| EntityData.Entity.Builder entityBuilder = EntityData.Entity.newBuilder(); | ||
| entityBuilder.setId(entity.getId()); | ||
|
|
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| for (Component component : entity.getAllComponents().values()) { | ||
| EntityData.Component.Builder componentBuilder = EntityData.Component.newBuilder(); | ||
| componentBuilder.setTypeName(component.getClass().toString().replaceFirst("class ", "")); | ||
|
|
||
| for (Field field : component.getClass().getDeclaredFields()) { | ||
| EntityData.Field.Builder fieldBuilder = EntityData.Field.newBuilder(); | ||
| fieldBuilder.setName(field.getName()); | ||
| fieldBuilder.setType(field.getType().toString()); | ||
| field.setAccessible(true); | ||
|
|
||
| String value = ""; | ||
| switch (field.getType().toString()) { | ||
| case "double": | ||
| value = String.valueOf((double) field.get(component)); | ||
| break; | ||
| case "float": | ||
| value = String.valueOf((float) field.get(component)); | ||
| break; | ||
| case "int": | ||
| value = String.valueOf((int) field.get(component)); | ||
| break; | ||
| case "long": | ||
| value = String.valueOf((long) field.get(component)); | ||
| break; | ||
| case "boolean": | ||
| value = String.valueOf((boolean) field.get(component)); | ||
| break; | ||
| case "class java.lang.String": | ||
| value = (String) field.get(component); | ||
| break; | ||
| case "class org.terasology.gestalt.assets.ResourceUrn": | ||
| value = ((ResourceUrn) field.get(component)).toString(); | ||
| break; | ||
| default: | ||
| logger.error("Trying to serialise unknown data-type: '{}'", field); | ||
| break; | ||
| } | ||
| fieldBuilder.setValue(ByteString.copyFrom(value.getBytes())); | ||
| componentBuilder.addField(fieldBuilder); | ||
| } | ||
| entityBuilder.addComponent(componentBuilder); | ||
| } | ||
| storeBuilder.addEntity(entityBuilder); | ||
| } | ||
|
|
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| FileOutputStream output = new FileOutputStream(file); | ||
| storeBuilder.build().writeTo(output); | ||
| output.close(); | ||
| } | ||
|
|
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| public void deserialise() throws IOException, ClassNotFoundException, InstantiationException, | ||
| IllegalAccessException, NoSuchFieldException { | ||
|
|
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| FileInputStream input = new FileInputStream(file); | ||
| EntityData.EntityStore store = EntityData.EntityStore.parseFrom(input); | ||
| input.close(); | ||
|
|
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| for (EntityData.Entity entity : store.getEntityList()) { | ||
| Collection<Component> componentsToAdd = Lists.newArrayList(); | ||
|
|
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| for (EntityData.Component component : entity.getComponentList()) { | ||
| Class<?> componentClass = Class.forName(component.getTypeName(), true, classLoader); | ||
| Component<?> componentObject = (Component<?>) componentClass.newInstance(); | ||
|
|
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| for (EntityData.Field field : component.getFieldList()) { | ||
| Field componentObjectField = componentClass.getDeclaredField(field.getName()); | ||
| componentObjectField.setAccessible(true); | ||
|
|
||
| String value = new String(field.getValue().toByteArray()); | ||
| switch (field.getType()) { | ||
| case "double": | ||
| componentObjectField.set(componentObject, Double.valueOf(value)); | ||
| break; | ||
| case "float": | ||
| componentObjectField.set(componentObject, Float.valueOf(value)); | ||
| break; | ||
| case "int": | ||
| componentObjectField.set(componentObject, Integer.valueOf(value)); | ||
| break; | ||
| case "long": | ||
| componentObjectField.set(componentObject, Long.valueOf(value)); | ||
| break; | ||
| case "boolean": | ||
| componentObjectField.set(componentObject, Boolean.valueOf(value)); | ||
| break; | ||
| case "class java.lang.String": | ||
| componentObjectField.set(componentObject, value); | ||
| break; | ||
| case "class org.terasology.gestalt.assets.ResourceUrn": | ||
| componentObjectField.set(componentObject, new ResourceUrn(value)); | ||
| break; | ||
| default: | ||
| logger.error("Trying to deserialise unknown data-type: '{}'", componentObjectField); | ||
| break; | ||
| } | ||
| } | ||
| componentsToAdd.add(componentObject); | ||
| } | ||
| entityManager.createEntity(componentsToAdd); | ||
| } | ||
| } | ||
| } |
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