WiP: Implement first prototypes of all SOP commands for external binaries

external-sop/src/main/java/sop/external/operation/ArmorExternal.java

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package sop.external.operation;
+
+import sop.Ready;
+import sop.enums.ArmorLabel;
+import sop.exception.SOPGPException;
+import sop.external.ExternalSOP;
+import sop.operation.Armor;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Properties;
+import java.util.List;
+
+public class ArmorExternal implements Armor {
+
+    private final List<String> commandList = new ArrayList<>();
+    private final List<String> envList;
+
+    public ArmorExternal(String binary, Properties environment) {
+        commandList.add(binary);
+        commandList.add("armor");
+        envList = ExternalSOP.propertiesToEnv(environment);
+    }
+
+    @Override
+    public Armor label(ArmorLabel label) throws SOPGPException.UnsupportedOption {
+        commandList.add("--label=" + label);
+        return this;
+    }
+
+    @Override
+    public Ready data(InputStream data) throws SOPGPException.BadData, IOException {
+        return ExternalSOP.ready(Runtime.getRuntime(), commandList, envList);
+    }
+}