From e6fbc62eb5e7531b74859df02ec6b06d09a8db5a Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Mon, 11 Jul 2016 22:05:58 +0100
Subject: Generate dynamic visitor

---
 .../util/asm/StackManipulationLookupTable.java     | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 src/main/java/org/zwobble/couscous/util/asm/StackManipulationLookupTable.java

(limited to 'src/main/java/org/zwobble/couscous/util/asm/StackManipulationLookupTable.java')

diff --git a/src/main/java/org/zwobble/couscous/util/asm/StackManipulationLookupTable.java b/src/main/java/org/zwobble/couscous/util/asm/StackManipulationLookupTable.java
new file mode 100644
index 0000000..f3fc2c2
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/util/asm/StackManipulationLookupTable.java
@@ -0,0 +1,30 @@
+package org.zwobble.couscous.util.asm;
+
+import net.bytebuddy.implementation.Implementation;
+import net.bytebuddy.implementation.bytecode.StackManipulation;
+import net.bytebuddy.implementation.bytecode.StackSize;
+import net.bytebuddy.jar.asm.Label;
+import net.bytebuddy.jar.asm.MethodVisitor;
+
+public class StackManipulationLookupTable implements StackManipulation {
+    private final Label dflt;
+    private final int[] keys;
+    private final Label[] labels;
+
+    public StackManipulationLookupTable(Label dflt, int[] keys, Label[] labels) {
+        this.dflt = dflt;
+        this.keys = keys;
+        this.labels = labels;
+    }
+
+    @Override
+    public boolean isValid() {
+        return true;
+    }
+
+    @Override
+    public Size apply(MethodVisitor methodVisitor, Implementation.Context implementationContext) {
+        methodVisitor.visitLookupSwitchInsn(dflt, keys, labels);
+        return StackSize.SINGLE.toDecreasingSize();
+    }
+}
-- 
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