(refs #7245) The first version of decompiler for SCL compilations

[simantics/platform.git] / bundles / org.simantics.scl.compiler.decompiler / src / org / simantics / scl / compiler / internal / decompiler / impl / DecompilerImpl.java

diff --git a/bundles/org.simantics.scl.compiler.decompiler/src/org/simantics/scl/compiler/internal/decompiler/impl/DecompilerImpl.java b/bundles/org.simantics.scl.compiler.decompiler/src/org/simantics/scl/compiler/internal/decompiler/impl/DecompilerImpl.java
new file mode 100644 (file)
index 0000000..8cc1033
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler.decompiler/src/org/simantics/scl/compiler/internal/decompiler/impl/DecompilerImpl.java
@@ -0,0 +1,43 @@
+package org.simantics.scl.compiler.internal.decompiler.impl;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import org.simantics.scl.compiler.internal.decompilation.IDecompiler;
+import org.simantics.scl.compiler.runtime.MutableClassLoader;
+
+import com.strobel.assembler.metadata.Buffer;
+import com.strobel.assembler.metadata.ITypeLoader;
+import com.strobel.core.VerifyArgument;
+import com.strobel.decompiler.Decompiler;
+import com.strobel.decompiler.DecompilerSettings;
+import com.strobel.decompiler.PlainTextOutput;
+
+public class DecompilerImpl implements IDecompiler {
+    @Override
+    public void decompile(MutableClassLoader classLoader, String className, Writer output) {
+        VerifyArgument.isNonNegative(3.0, "asd");
+        DecompilerSettings settings = DecompilerSettings.javaDefaults();
+        settings.setTypeLoader(new ITypeLoader() {
+            @Override
+            public boolean tryLoadType(String internalName, Buffer buffer) {
+                byte[] bytes = classLoader.getBytes(internalName.replace('/', '.'));
+                if(bytes == null)
+                    return false;
+                
+                buffer.reset(bytes.length);
+                System.arraycopy(bytes, 0, buffer.array(), 0, bytes.length);
+                return true;
+            }
+        });
+        Decompiler.decompile(
+                className,
+                new PlainTextOutput(output),
+                settings);
+        try {
+            output.flush();
+        } catch (IOException e) {
+        }
+    }
+    
+}