Add RemapperPreprocessor

Used to "preprocess" a class file, using the ASM tree API,
before remapping with JarRemapper. Right now it only
extracts the inheritance and adds to an InheritanceMap.

Code moved from MCPC+ PluginClassLoader.

src/main/java/net/md_5/specialsource/ReflectionRemapper.java

@@ -1,3 +1,31 @@
+/**
+ * Copyright (c) 2012, md_5. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * The name of the author may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
 package net.md_5.specialsource;
 
 import org.objectweb.asm.ClassReader;

src/main/java/net/md_5/specialsource/RemapperPreprocessor.java

@@ -0,0 +1,90 @@
+/**
+ * Copyright (c) 2012, md_5. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * The name of the author may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.md_5.specialsource;
+
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.tree.ClassNode;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * "Pre-process" a class file, intended to be used before remapping with JarRemapper.
+ *
+ * Currently includes:
+ * - Extracting inheritance
+ */
+
+public class RemapperPreprocessor {
+
+    public boolean debug = false;
+
+    private InheritanceMap inheritanceMap;
+
+    /**
+     *
+     * @param inheritanceMap Map to add extracted inheritance information too, or null to not extract inheritance
+     * @throws IOException
+     */
+    @SuppressWarnings("unchecked")
+    public RemapperPreprocessor(InheritanceMap inheritanceMap) {
+        this.inheritanceMap = inheritanceMap;
+    }
+
+    public void preprocess(String className, InputStream inputStream) throws IOException {
+        ClassReader classReader = new ClassReader(inputStream);
+        ClassNode classNode = new ClassNode();
+        classReader.accept(classNode, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES); // TODO
+
+        if (inheritanceMap != null) {
+            log("Loading plugin class inheritance for "+className);
+
+            // Get inheritance
+            ArrayList<String> parents = new ArrayList<String>();
+
+            for (String iface : (List<String>) classNode.interfaces) {
+                parents.add(iface);
+            }
+            parents.add(classNode.superName);
+
+            inheritanceMap.inheritanceMap.put(className.replace('.', '/'), parents);
+
+            log("Inheritance added "+className+" parents "+parents.size());
+        }
+        // TODO: ReflectionRemapper
+    }
+
+    private void log(String message) {
+        if (debug) {
+            System.out.println("[RemapperPreprocessor] " + message);
+        }
+    }
+}