org.diorite.inject.controller.TransformerMethodInjector.java Source code

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Here is the source code for org.diorite.inject.controller.TransformerMethodInjector.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016. Diorite (by Bartomiej Mazur (aka GotoFinal))
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package org.diorite.inject.controller;

import org.objectweb.asm.tree.InsnList;
import org.objectweb.asm.tree.InsnNode;
import org.objectweb.asm.tree.MethodNode;

final class TransformerMethodInjector {
    private final Transformer injectTransformer;

    private TransformerMethodInjector(Transformer injectTransformer) {
        this.injectTransformer = injectTransformer;
    }

    public static TransformerMethodInjector run(Transformer injectTransformer) {
        TransformerMethodInjector injectorTransformer = new TransformerMethodInjector(injectTransformer);
        injectorTransformer.injectMethods();
        return injectorTransformer;
    }

    public Transformer getInjectTransformer() {
        return this.injectTransformer;
    }

    private void injectMethods() {
        MethodNode methodNode = new MethodNode();
        for (ControllerMethodData methodData : this.injectTransformer.classData.getMethods()) {
            TransformerInvokerGenerator.generateMethodInjection(this.injectTransformer.classData, methodData,
                    methodNode, true, -1);
        }
        for (TransformerInitMethodData methodData : this.injectTransformer.inits.values()) {
            InsnList instructions = methodData.node.instructions;
            for (InsnNode node : methodData.returns) {
                instructions.insertBefore(node, methodNode.instructions);
            }
        }
    }
}