From 59c2859881754b0f8afe1639744befd79c104dc3 Mon Sep 17 00:00:00 2001
From: Vaci Koblizek <vaci@vaci.org>
Date: Sun, 27 Sep 2020 23:20:33 +0100
Subject: [PATCH] implement cap table builder and reader

---
 .../org/capnproto/BuilderCapabilityTable.java | 34 +++++++++++++++++++
 .../org/capnproto/ReaderCapabilityTable.java  | 17 ++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 runtime/src/main/java/org/capnproto/BuilderCapabilityTable.java
 create mode 100644 runtime/src/main/java/org/capnproto/ReaderCapabilityTable.java

diff --git a/runtime/src/main/java/org/capnproto/BuilderCapabilityTable.java b/runtime/src/main/java/org/capnproto/BuilderCapabilityTable.java
new file mode 100644
index 0000000..5996c47
--- /dev/null
+++ b/runtime/src/main/java/org/capnproto/BuilderCapabilityTable.java
@@ -0,0 +1,34 @@
+package org.capnproto;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class BuilderCapabilityTable implements CapTableBuilder {
+
+    private final List<ClientHook> table = new ArrayList<>();
+
+    BuilderCapabilityTable() {
+    }
+
+    @Override
+    public ClientHook extractCap(int index) {
+        return table.get(index);
+    }
+
+    @Override
+    public int injectCap(ClientHook cap) {
+        int index = table.size();
+        table.add(cap);
+        return index;
+    }
+
+    @Override
+    public void dropCap(int index) {
+        table.set(index, null);
+    }
+
+    @Override
+    public ClientHook[] getTable() {
+        return table.toArray(new ClientHook[0]);
+    }
+}
diff --git a/runtime/src/main/java/org/capnproto/ReaderCapabilityTable.java b/runtime/src/main/java/org/capnproto/ReaderCapabilityTable.java
new file mode 100644
index 0000000..a1ba09b
--- /dev/null
+++ b/runtime/src/main/java/org/capnproto/ReaderCapabilityTable.java
@@ -0,0 +1,17 @@
+package org.capnproto;
+
+import java.util.List;
+
+class ReaderCapabilityTable implements CapTableReader {
+
+    final List<ClientHook> table;
+
+    ReaderCapabilityTable(List<ClientHook> table) {
+        this.table = table;
+    }
+
+    @Override
+    public ClientHook extractCap(int index) {
+        return index < table.size() ? table.get(index) : null;
+    }
+}