Example usage for org.objectweb.asm Opcodes GETFIELD

List of usage examples for org.objectweb.asm Opcodes GETFIELD

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In this page you can find the example usage for org.objectweb.asm Opcodes GETFIELD.

Prototype

int GETFIELD

To view the source code for org.objectweb.asm Opcodes GETFIELD.

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Usage

From source file:org.pitest.mutationtest.engine.gregor.mutators.experimental.extended.UOIMutator2.java

License:Apache License

@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
    // GETFIELD I,F,L,D + B,S
    if ((opcode == Opcodes.GETFIELD)) {
        if (desc.equals("I")) {
            if (this.shouldMutate("Decremented (a--) integer field " + name)) {
                // stack  = [this]

                mv.visitInsn(Opcodes.DUP);
                // stack = [this] [this]

                mv.visitFieldInsn(opcode, owner, name, desc);
                // stack = [this] [this.field]

                mv.visitInsn(Opcodes.DUP_X1);
                // stack = [this.field] [this] [this.field]

                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);

                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }//  ww w  .  j  a  v  a 2s.  c  om
        }
        if (desc.equals("F")) {
            if (this.shouldMutate("Decremented (a--) float field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitInsn(Opcodes.FCONST_1);
                mv.visitInsn(Opcodes.FSUB);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("J")) {
            if (this.shouldMutate("Decremented (a--) long field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP2_X1);
                mv.visitInsn(Opcodes.LCONST_1);
                mv.visitInsn(Opcodes.LSUB);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("D")) {
            if (this.shouldMutate("Decremented (a--) double field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP2_X1);
                mv.visitInsn(Opcodes.DCONST_1);
                mv.visitInsn(Opcodes.DSUB);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("B")) {
            if (this.shouldMutate("Decremented (a--) byte field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2B);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("S")) {
            if (this.shouldMutate("Decremented (a--) short field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2S);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
    }

    // GETSTATIC I,F,L,D + B,S
    if (opcode == Opcodes.GETSTATIC) {
        if (desc.equals("I")) {
            if (this.shouldMutate("Decremented (a--) static integer field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                // stack = [this.sfield]

                mv.visitInsn(Opcodes.DUP);
                // stack = [this.sfield] [this.sfield]

                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                // stack = [this.sfield] [this.sfield -1]

                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("F")) {
            if (this.shouldMutate("Decremented (a--) static float field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP);
                mv.visitInsn(Opcodes.FCONST_1);
                mv.visitInsn(Opcodes.FSUB);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("J")) {
            if (this.shouldMutate("Decremented (a--) static long field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP2);
                mv.visitInsn(Opcodes.LCONST_1);
                mv.visitInsn(Opcodes.LSUB);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("D")) {
            if (this.shouldMutate("Decremented (a--) static double field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP2);
                mv.visitInsn(Opcodes.DCONST_1);
                mv.visitInsn(Opcodes.DSUB);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("B")) {
            if (this.shouldMutate("Decremented (a--) static byte field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2B);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("S")) {
            if (this.shouldMutate("Decremented (a--) static short field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DUP);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2S);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
    }
    mv.visitFieldInsn(opcode, owner, name, desc);
}

From source file:org.pitest.mutationtest.engine.gregor.mutators.experimental.extended.UOIMutator3.java

License:Apache License

@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
    // GETFIELD I,F,L,D + B,S
    if ((opcode == Opcodes.GETFIELD)) {
        if (desc.equals("I")) {
            if (this.shouldMutate("Incremented (++a) integer field " + name)) {
                // stack = [this]

                mv.visitInsn(Opcodes.DUP);
                // stack = [this] [this]

                mv.visitFieldInsn(opcode, owner, name, desc);
                // stack = [this] [this.field]

                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.IADD);
                // stack = [this] [this.field +1]

                mv.visitInsn(Opcodes.DUP_X1);
                // stack = [this.field +1] [this] [this.field +1]

                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }//from  w  ww . j  av  a 2 s .  c o m
        }
        if (desc.equals("F")) {
            if (this.shouldMutate("Incremented (++a) float field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.FCONST_1);
                mv.visitInsn(Opcodes.FADD);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("J")) {
            if (this.shouldMutate("Incremented (++a) long field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.LCONST_1);
                mv.visitInsn(Opcodes.LADD);
                mv.visitInsn(Opcodes.DUP2_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("D")) {
            if (this.shouldMutate("Incremented (++a) double field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DCONST_1);
                mv.visitInsn(Opcodes.DADD);
                mv.visitInsn(Opcodes.DUP2_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("B")) {
            if (this.shouldMutate("Incremented (++a) byte field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.IADD);
                mv.visitInsn(Opcodes.I2B);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("S")) {
            if (this.shouldMutate("Incremented (++a) short field " + name)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.IADD);
                mv.visitInsn(Opcodes.I2S);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
    }

    // GETSTATIC I,F,L,D + B,S
    if (opcode == Opcodes.GETSTATIC) {
        if (desc.equals("I")) {
            if (this.shouldMutate("Incremented (++a) static integer field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.IADD);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("F")) {
            if (this.shouldMutate("Incremented (++a) static float field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.FCONST_1);
                mv.visitInsn(Opcodes.FADD);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("J")) {
            if (this.shouldMutate("Incremented (++a) static long field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.LCONST_1);
                mv.visitInsn(Opcodes.LADD);
                mv.visitInsn(Opcodes.DUP2);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("D")) {
            if (this.shouldMutate("Incremented (++a) static double field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DCONST_1);
                mv.visitInsn(Opcodes.DADD);
                mv.visitInsn(Opcodes.DUP2);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("B")) {
            if (this.shouldMutate("Incremented (++a) static byte field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.IADD);
                mv.visitInsn(Opcodes.I2B);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("S")) {
            if (this.shouldMutate("Incremented (++a) static short field " + name)) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.IADD);
                mv.visitInsn(Opcodes.I2S);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
    }
    mv.visitFieldInsn(opcode, owner, name, desc);
}

From source file:org.pitest.mutationtest.engine.gregor.mutators.experimental.extended.UOIMutator4.java

License:Apache License

@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {

    // GETFIELD I,F,L,D + B,S
    if ((opcode == Opcodes.GETFIELD)) {
        if (desc.equals("I")) {
            if (this.shouldMutate("Decremented (--a) integer field")) {
                // stack = [this]

                mv.visitInsn(Opcodes.DUP);
                // stack = [this] [this]

                mv.visitFieldInsn(opcode, owner, name, desc);
                // stack = [this] [this.field]

                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                // stack = [this] [this.field -1]

                mv.visitInsn(Opcodes.DUP_X1);
                // stack = [this.field -1] [this] [this.field -1]

                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }/*www .j  a  v a 2 s  .  c o m*/
        }
        if (desc.equals("F")) {
            if (this.shouldMutate("Decremented (--a) float field")) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.FCONST_1);
                mv.visitInsn(Opcodes.FSUB);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("J")) {
            if (this.shouldMutate("Decremented (--a) long field")) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.LCONST_1);
                mv.visitInsn(Opcodes.LSUB);
                mv.visitInsn(Opcodes.DUP2_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("D")) {
            if (this.shouldMutate("Decremented (--a) double field")) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DCONST_1);
                mv.visitInsn(Opcodes.DSUB);
                mv.visitInsn(Opcodes.DUP2_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("B")) {
            if (this.shouldMutate("Decremented (--a) double field")) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2B);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
        if (desc.equals("S")) {
            if (this.shouldMutate("Decremented (--a) short field")) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2S);
                mv.visitInsn(Opcodes.DUP_X1);
                mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, desc);
                return;
            }
        }
    }

    // GETSTATIC I,F,L,D + B,S
    if (opcode == Opcodes.GETSTATIC) {
        if (desc.equals("I")) {
            if (this.shouldMutate("Decremented (--a) static integer field")) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("F")) {
            if (this.shouldMutate("Decremented (--a) static float field")) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.FCONST_1);
                mv.visitInsn(Opcodes.FSUB);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("J")) {
            if (this.shouldMutate("Decremented (--a) static long field")) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.LCONST_1);
                mv.visitInsn(Opcodes.LSUB);
                mv.visitInsn(Opcodes.DUP2);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("D")) {
            if (this.shouldMutate("Decremented (--a) static double field")) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.DCONST_1);
                mv.visitInsn(Opcodes.DSUB);
                mv.visitInsn(Opcodes.DUP2);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("B")) {
            if (this.shouldMutate("Decremented (--a) static byte field")) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2B);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
        if (desc.equals("S")) {
            if (this.shouldMutate("Decremented (--a) static short field")) {
                mv.visitFieldInsn(opcode, owner, name, desc);
                mv.visitInsn(Opcodes.ICONST_1);
                mv.visitInsn(Opcodes.ISUB);
                mv.visitInsn(Opcodes.I2S);
                mv.visitInsn(Opcodes.DUP);
                mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, desc);
                return;
            }
        }
    }
    mv.visitFieldInsn(opcode, owner, name, desc);
}

From source file:org.sonar.java.bytecode.se.BytecodeEGWalkerExecuteTest.java

License:Open Source License

@Test
public void test_getfield() throws Exception {
    SymbolicValue objectRef = new SymbolicValue();
    ProgramState programState = execute(
            new Instruction(Opcodes.GETFIELD, new Instruction.FieldOrMethod("", "", "D", false)),
            ProgramState.EMPTY_STATE.stackValue(objectRef));
    SymbolicValue fieldValue = programState.peekValue();
    assertThat(fieldValue).isNotNull();/*from ww w.  ja va 2 s .  c  om*/
    assertThat(isDoubleOrLong(programState, fieldValue)).isTrue();
    assertThat(fieldValue).isNotEqualTo(objectRef);

    programState = execute(new Instruction(Opcodes.GETFIELD, new Instruction.FieldOrMethod("", "", "I", false)),
            ProgramState.EMPTY_STATE.stackValue(objectRef));
    fieldValue = programState.peekValue();
    assertThat(fieldValue).isNotNull();
    assertThat(isDoubleOrLong(programState, fieldValue)).isFalse();

    assertThatThrownBy(() -> execute(new Instruction(Opcodes.GETFIELD)))
            .hasMessage("GETFIELD needs 1 values on stack");
}

From source file:org.spongepowered.asm.mixin.injection.points.BeforeFieldAccess.java

License:MIT License

public BeforeFieldAccess(InjectionPointData data) {
    super(data);/*w  w  w  .j a v a 2s  . com*/
    this.opcode = data.getOpcode(-1, Opcodes.GETFIELD, Opcodes.PUTFIELD, Opcodes.GETSTATIC, Opcodes.PUTSTATIC,
            -1);
}

From source file:org.spongepowered.asm.mixin.transformer.MixinTargetContext.java

License:MIT License

/**
 * Handle "imaginary super" invokations, these are invokations in
 * non-derived mixins for accessing methods known to exist in a supermixin
 * which is not directly inherited by this mixix. The method can only call
 * its <b>own</b> super-implmentation and the methd must also be tagged with
 * {@link SoftOverride} to indicate that the method must exist in a super
 * class./* w  w w .  j a v  a  2s.c  o m*/
 * 
 * @param method Method being processed
 * @param fieldInsn the GETFIELD insn which access the pseudo-field which is
 *      used as a handle to the superclass
 */
private void processImaginarySuper(MethodNode method, FieldInsnNode fieldInsn) {
    if (fieldInsn.getOpcode() != Opcodes.GETFIELD) {
        if (MixinTargetContext.INIT.equals(method.name)) {
            throw new InvalidMixinException(this, "Illegal imaginary super declaration: field " + fieldInsn.name
                    + " must not specify an initialiser");
        }

        throw new InvalidMixinException(this, "Illegal imaginary super access: found "
                + ASMHelper.getOpcodeName(fieldInsn.getOpcode()) + " opcode in " + method.name + method.desc);
    }

    if ((method.access & Opcodes.ACC_PRIVATE) != 0 || (method.access & Opcodes.ACC_STATIC) != 0) {
        throw new InvalidMixinException(this, "Illegal imaginary super access: method " + method.name
                + method.desc + " is private or static");
    }

    if (ASMHelper.getInvisibleAnnotation(method, SoftOverride.class) == null) {
        throw new InvalidMixinException(this, "Illegal imaginary super access: method " + method.name
                + method.desc + " is not decorated with @SoftOverride");
    }

    for (Iterator<AbstractInsnNode> methodIter = method.instructions
            .iterator(method.instructions.indexOf(fieldInsn)); methodIter.hasNext();) {
        AbstractInsnNode insn = methodIter.next();
        if (insn instanceof MethodInsnNode) {
            MethodInsnNode methodNode = (MethodInsnNode) insn;
            if (methodNode.owner.equals(this.getClassRef()) && methodNode.name.equals(method.name)
                    && methodNode.desc.equals(method.desc)) {
                methodNode.setOpcode(Opcodes.INVOKESPECIAL);
                this.updateStaticBinding(method, methodNode);
                return;
            }
        }
    }

    throw new InvalidMixinException(this,
            "Illegal imaginary super access: could not find INVOKE for " + method.name + method.desc);
}

From source file:org.spongepowered.mod.asm.util.ASMEventListenerFactory.java

License:MIT License

@SuppressWarnings("unchecked")
private static <T> Class<T> createClass(Class<T> interf, Method input, Method output) {

    String className = getClassName(interf, input, output);

    ClassWriter cwBase = new ClassWriter(0);
    CheckClassAdapter cw = new CheckClassAdapter(cwBase);

    MethodVisitor mv;/*  w ww.jav a 2 s .com*/

    String classNameDesc = className.replace('.', '/');

    String interfaceInternalName = Type.getInternalName(interf);

    String inputName = input.getName();
    String inputMethodDescriptor = Type.getMethodDescriptor(input);

    String outputParameterTypeIntName = Type.getInternalName(output.getParameterTypes()[0]);
    String outputTargetTypeIntName = Type.getInternalName(output.getDeclaringClass());
    String outputMethodDescriptor = Type.getMethodDescriptor(output);
    String outputName = output.getName();

    boolean isOutputInterface = output.getDeclaringClass().isInterface();

    // A new class of the following form is created, with a unique name
    //
    // package org.spongepowered.mod.asm;
    // public class <className> extends java.lang.Object implements <interf>
    //
    //     private final Object target
    //
    //     public <className> (java.lang.Object target) {
    //         super();
    //         this.target = target;
    //         return;
    //     }
    //
    //     public void <inputMethod> (<inputMethodType event) {
    //         ((outputTargetType) this.target).outputMethod((outputParameteType) event);
    //         return
    //     }
    // }

    // package org.spongepowered.mod.asm;
    // public class <className> extends java.lang.Object implements <interf>
    cw.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER, classNameDesc, null, "java/lang/Object",
            new String[] { interfaceInternalName });

    // private final Object target
    cw.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_FINAL, "target", "Ljava/lang/Object;", null, null);

    // Constructor

    // public UniqueClass (java.lang.Object target) {
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "(Ljava/lang/Object;)V", null, null);
    mv.visitCode();

    // super();
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);

    // this.target = target;
    mv.visitVarInsn(Opcodes.ALOAD, 0); // Loads this
    mv.visitVarInsn(Opcodes.ALOAD, 1); // Loads target (from input)
    mv.visitFieldInsn(Opcodes.PUTFIELD, classNameDesc, "target", "Ljava/lang/Object;");

    // return;
    mv.visitInsn(Opcodes.RETURN);

    // }
    // 2 localvars due to inputs: this, target
    // 2 items on stack after double ALOAD
    mv.visitMaxs(2, 2);
    mv.visitEnd();

    // Callback method

    // public void <inputMethod> (<inputMethodType event) {
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, inputName, inputMethodDescriptor, null, null);
    mv.visitCode();

    // push((casted) this.target)
    mv.visitVarInsn(Opcodes.ALOAD, 0); // Loads this
    mv.visitFieldInsn(Opcodes.GETFIELD, classNameDesc, "target", "Ljava/lang/Object;");
    mv.visitTypeInsn(Opcodes.CHECKCAST, outputTargetTypeIntName);

    // push((casted) event)
    mv.visitVarInsn(Opcodes.ALOAD, 1); // Loads method parameter 0
    mv.visitTypeInsn(Opcodes.CHECKCAST, outputParameterTypeIntName);

    // ((outputTargetType) this.target).outputMethod((outputParameteType) event);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, outputTargetTypeIntName, outputName, outputMethodDescriptor,
            isOutputInterface);

    // return
    mv.visitInsn(Opcodes.RETURN);

    // }
    mv.visitMaxs(2, 2);
    mv.visitEnd();

    cw.visitEnd();

    byte[] bytes = cwBase.toByteArray();

    return (Class<T>) loader.defineClass(className, bytes);
}

From source file:org.springframework.xd.fluent.internal.CustomizedModuleGenerator.java

License:Apache License

/**
 * @param inDescriptor input descriptor of the form Lfoo/Bar;
 * @param outDescriptor output descriptor of the form Lfoo/Boo;
 *///w  w  w .j  a va 2s .  c o m
private static void writeCustomCode(ZipOutputStream zos, String inDescriptor, String outDescriptor) {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    cw.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER, "org/springframework/xd/code/Code", null,
            "org/springframework/xd/code/CodeDrivenProcessor", null);

    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, "org/springframework/xd/code/CodeDrivenProcessor", "<init>", "()V",
            false);
    mv.visitInsn(RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    // An example transform method that picks even number chars from the input payload and makes that into the output
    mv = cw.visitMethod(ACC_PUBLIC, "transform", "(" + inDescriptor + ")" + outDescriptor, null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, "org/springframework/xd/code/Code", "fn",
            "Ljava/util/function/Function;");
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/function/Function", "apply",
            "(Ljava/lang/Object;)Ljava/lang/Object;", true);
    mv.visitTypeInsn(CHECKCAST, outDescriptor.substring(1, outDescriptor.length() - 1));//"java/lang/Integer");
    mv.visitInsn(ARETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
    cw.visitEnd();
    try {
        zos.write(cw.toByteArray());
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

From source file:org.springsource.loaded.test.infra.MethodPrinter.java

License:Apache License

public void visitFieldInsn(int opcode, String owner, String name, String desc) {
    if (opcode == Opcodes.GETSTATIC) {
        to.println("    GETSTATIC " + owner + "." + name + " " + desc);
    } else if (opcode == Opcodes.PUTSTATIC) {
        to.println("    PUTSTATIC " + owner + "." + name + " " + desc);
    } else if (opcode == Opcodes.GETFIELD) {
        to.println("    GETFIELD " + owner + "." + name + " " + desc);
    } else if (opcode == Opcodes.PUTFIELD) {
        to.println("    PUTFIELD " + owner + "." + name + " " + desc);
    } else {// w  w w  . jav a2  s.  co m
        throw new IllegalStateException(":" + opcode);
    }
}

From source file:org.teavm.flavour.regex.bytecode.MatcherClassBuilder.java

License:Apache License

private void buildValidMethod(ClassVisitor cv, String className) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "isValid", "()Z", null, null);
    mv.visitCode();//from  ww w.j  a  va2  s.c  o m

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, className, "state", "I");
    Label trueLabel = new Label();
    mv.visitJumpInsn(Opcodes.IFGE, trueLabel);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitInsn(Opcodes.IRETURN);
    mv.visitLabel(trueLabel);
    mv.visitInsn(Opcodes.ICONST_1);
    mv.visitInsn(Opcodes.IRETURN);

    mv.visitMaxs(2, 1);
    mv.visitEnd();
}