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persisting mementos

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zeroflag 2021-08-14 21:56:38 +02:00
parent 1b94ee5305
commit e52108be5f
1 changed files with 14 additions and 1 deletions
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15
src/main/java/com/vectron/fcl/FclStack.java
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@ -2,6 +2,8 @@ package com.vectron.fcl;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.stream.JsonReader;
import com.vectron.fcl.types.Obj;
import java.io.BufferedReader;
@ -13,6 +15,8 @@ import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import static java.util.Arrays.asList;
public class FclStack {
private static final Gson gson;
private final LStack<Obj> stack = new LStack<>();
@ -81,7 +85,7 @@ public class FclStack {
stream = fileStore.open(fileName(id));
Obj[] loaded = gson.fromJson(new BufferedReader(new InputStreamReader(stream)), Obj[].class);
stack.clear();
stack.addAll(Arrays.asList(loaded));
stack.addAll(asList(loaded));
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
@ -95,10 +99,19 @@ public class FclStack {
}
}
public void load(JsonReader jsonReader) {
stack.clear();
stack.addAll(asList(gson.fromJson(jsonReader, Obj[].class)));
}
public void save(FileStore fileStore, String id) {
fileStore.save(gson.toJson(stack.toArray(new Obj[0])).getBytes(), fileName(id));
}
public JsonElement toJsonTree() {
return gson.toJsonTree(stack.toArray(new Obj[0]));
}
private String fileName(String id) {
return String.format("stack%s.json", id);
}