Cleanup

core/src/main/java/io/xpipe/core/store/FileStore.java

@@ -27,6 +27,11 @@ public class FileStore implements StreamDataStore, FilenameStore {
         this.file = file;
     }
 
+    @Override
+    public boolean canOpen() {
+        return machine.exists(file);
+    }
+
     @Override
     public String toDisplay() {
         return file + "@" + machine.toDisplay();

core/src/main/java/io/xpipe/core/store/InputStreamDataStore.java

@@ -109,7 +109,7 @@ public class InputStreamDataStore implements StreamDataStore {
     }
 
     @Override
-    public boolean exists() {
+    public boolean canOpen() {
         return true;
     }
 }

core/src/main/java/io/xpipe/core/store/LocalMachineStore.java

@@ -10,6 +10,11 @@ import java.nio.file.Path;
 @JsonTypeName("local")
 public class LocalMachineStore implements MachineStore {
 
+    @Override
+    public boolean exists(String file) {
+        return Files.exists(Path.of(file));
+    }
+
     @Override
     public String toDisplay() {
         return "local";

core/src/main/java/io/xpipe/core/store/MachineStore.java

@@ -13,4 +13,5 @@ public interface MachineStore extends DataStore {
 
     OutputStream openOutput(String file) throws Exception;
 
+    public boolean exists(String file);
 }

core/src/main/java/io/xpipe/core/store/OutputStreamStore.java

@@ -22,7 +22,7 @@ public class OutputStreamStore implements StreamDataStore {
     }
 
     @Override
-    public boolean exists() {
+    public boolean canOpen() {
         return true;
     }
 }

core/src/main/java/io/xpipe/core/store/StdinDataStore.java

@@ -87,7 +87,7 @@ public class StdinDataStore implements StreamDataStore {
     }
 
     @Override
-    public boolean exists() {
+    public boolean canOpen() {
         return false;
     }
 }

core/src/main/java/io/xpipe/core/store/StdoutDataStore.java

@@ -40,7 +40,7 @@ public class StdoutDataStore implements StreamDataStore {
     }
 
     @Override
-    public boolean exists() {
+    public boolean canOpen() {
         return false;
     }
 }

core/src/main/java/io/xpipe/core/store/StreamDataStore.java

@@ -23,12 +23,8 @@ public interface StreamDataStore extends DataStore {
         throw new UnsupportedOperationException("Can't open store output");
     }
 
-    default OutputStream openAppendingOutput() throws Exception {
-        throw new UnsupportedOperationException("Can't open store output");
-    }
-
-    default boolean exists() {
-        return false;
+    default boolean canOpen() {
+        return true;
     }
 
     default boolean persistent() {

core/src/main/java/io/xpipe/core/store/URLDataStore.java

@@ -16,7 +16,7 @@ public class URLDataStore implements StreamDataStore {
     }
 
     @Override
-    public boolean exists() {
+    public boolean canOpen() {
         return true;
     }
 }