http://asm.ow2.io/: Usefull class adapters based on ASM, a very small and fast Java bytecode manipulation framework (OW2)
  • Eric Bruneton
  • Eugene Kuleshov
  • Remi Forax 
// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. 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.
// 3. Neither the name of the copyright holders nor the names of its
//    contributors may 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 org.objectweb.asm.commons;

import org.objectweb.asm.ConstantDynamic;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;


A MethodVisitor providing a more detailed API to generate and transform instructions. 
Author:Eric Bruneton
/**
 * A {@link MethodVisitor} providing a more detailed API to generate and transform instructions.
 *
 * @author Eric Bruneton
 */
public class InstructionAdapter extends MethodVisitor {

  
The type of the java.lang.Object class. 
/** The type of the java.lang.Object class. */
  public static final Type OBJECT_TYPE = Type.getType("Ljava/lang/Object;");

  
Constructs a new InstructionAdapter. Subclasses must not use this constructor. Instead, they must use the InstructionAdapter(int, MethodVisitor) version. 
Params:
  • methodVisitor – the method visitor to which this adapter delegates calls.
Throws:
/**
   * Constructs a new {@link InstructionAdapter}. <i>Subclasses must not use this constructor</i>.
   * Instead, they must use the {@link #InstructionAdapter(int, MethodVisitor)} version.
   *
   * @param methodVisitor the method visitor to which this adapter delegates calls.
   * @throws IllegalStateException If a subclass calls this constructor.
   */
  public InstructionAdapter(final MethodVisitor methodVisitor) {
    this(/* latest api = */ Opcodes.ASM9, methodVisitor);
    if (getClass() != InstructionAdapter.class) {
      throw new IllegalStateException();
    }
  }

  
Constructs a new InstructionAdapter. 
Params:
/**
   * Constructs a new {@link InstructionAdapter}.
   *
   * @param api the ASM API version implemented by this visitor. Must be one of {@link
   *     Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6}, {@link Opcodes#ASM7}, {@link
   *     Opcodes#ASM8} or {@link Opcodes#ASM9}.
   * @param methodVisitor the method visitor to which this adapter delegates calls.
   */
  protected InstructionAdapter(final int api, final MethodVisitor methodVisitor) {
    super(api, methodVisitor);
  }

  @Override
  public void visitInsn(final int opcode) {
    switch (opcode) {
      case Opcodes.NOP:
        nop();
        break;
      case Opcodes.ACONST_NULL:
        aconst(null);
        break;
      case Opcodes.ICONST_M1:
      case Opcodes.ICONST_0:
      case Opcodes.ICONST_1:
      case Opcodes.ICONST_2:
      case Opcodes.ICONST_3:
      case Opcodes.ICONST_4:
      case Opcodes.ICONST_5:
        iconst(opcode - Opcodes.ICONST_0);
        break;
      case Opcodes.LCONST_0:
      case Opcodes.LCONST_1:
        lconst((long) (opcode - Opcodes.LCONST_0));
        break;
      case Opcodes.FCONST_0:
      case Opcodes.FCONST_1:
      case Opcodes.FCONST_2:
        fconst((float) (opcode - Opcodes.FCONST_0));
        break;
      case Opcodes.DCONST_0:
      case Opcodes.DCONST_1:
        dconst((double) (opcode - Opcodes.DCONST_0));
        break;
      case Opcodes.IALOAD:
        aload(Type.INT_TYPE);
        break;
      case Opcodes.LALOAD:
        aload(Type.LONG_TYPE);
        break;
      case Opcodes.FALOAD:
        aload(Type.FLOAT_TYPE);
        break;
      case Opcodes.DALOAD:
        aload(Type.DOUBLE_TYPE);
        break;
      case Opcodes.AALOAD:
        aload(OBJECT_TYPE);
        break;
      case Opcodes.BALOAD:
        aload(Type.BYTE_TYPE);
        break;
      case Opcodes.CALOAD:
        aload(Type.CHAR_TYPE);
        break;
      case Opcodes.SALOAD:
        aload(Type.SHORT_TYPE);
        break;
      case Opcodes.IASTORE:
        astore(Type.INT_TYPE);
        break;
      case Opcodes.LASTORE:
        astore(Type.LONG_TYPE);
        break;
      case Opcodes.FASTORE:
        astore(Type.FLOAT_TYPE);
        break;
      case Opcodes.DASTORE:
        astore(Type.DOUBLE_TYPE);
        break;
      case Opcodes.AASTORE:
        astore(OBJECT_TYPE);
        break;
      case Opcodes.BASTORE:
        astore(Type.BYTE_TYPE);
        break;
      case Opcodes.CASTORE:
        astore(Type.CHAR_TYPE);
        break;
      case Opcodes.SASTORE:
        astore(Type.SHORT_TYPE);
        break;
      case Opcodes.POP:
        pop();
        break;
      case Opcodes.POP2:
        pop2();
        break;
      case Opcodes.DUP:
        dup();
        break;
      case Opcodes.DUP_X1:
        dupX1();
        break;
      case Opcodes.DUP_X2:
        dupX2();
        break;
      case Opcodes.DUP2:
        dup2();
        break;
      case Opcodes.DUP2_X1:
        dup2X1();
        break;
      case Opcodes.DUP2_X2:
        dup2X2();
        break;
      case Opcodes.SWAP:
        swap();
        break;
      case Opcodes.IADD:
        add(Type.INT_TYPE);
        break;
      case Opcodes.LADD:
        add(Type.LONG_TYPE);
        break;
      case Opcodes.FADD:
        add(Type.FLOAT_TYPE);
        break;
      case Opcodes.DADD:
        add(Type.DOUBLE_TYPE);
        break;
      case Opcodes.ISUB:
        sub(Type.INT_TYPE);
        break;
      case Opcodes.LSUB:
        sub(Type.LONG_TYPE);
        break;
      case Opcodes.FSUB:
        sub(Type.FLOAT_TYPE);
        break;
      case Opcodes.DSUB:
        sub(Type.DOUBLE_TYPE);
        break;
      case Opcodes.IMUL:
        mul(Type.INT_TYPE);
        break;
      case Opcodes.LMUL:
        mul(Type.LONG_TYPE);
        break;
      case Opcodes.FMUL:
        mul(Type.FLOAT_TYPE);
        break;
      case Opcodes.DMUL:
        mul(Type.DOUBLE_TYPE);
        break;
      case Opcodes.IDIV:
        div(Type.INT_TYPE);
        break;
      case Opcodes.LDIV:
        div(Type.LONG_TYPE);
        break;
      case Opcodes.FDIV:
        div(Type.FLOAT_TYPE);
        break;
      case Opcodes.DDIV:
        div(Type.DOUBLE_TYPE);
        break;
      case Opcodes.IREM:
        rem(Type.INT_TYPE);
        break;
      case Opcodes.LREM:
        rem(Type.LONG_TYPE);
        break;
      case Opcodes.FREM:
        rem(Type.FLOAT_TYPE);
        break;
      case Opcodes.DREM:
        rem(Type.DOUBLE_TYPE);
        break;
      case Opcodes.INEG:
        neg(Type.INT_TYPE);
        break;
      case Opcodes.LNEG:
        neg(Type.LONG_TYPE);
        break;
      case Opcodes.FNEG:
        neg(Type.FLOAT_TYPE);
        break;
      case Opcodes.DNEG:
        neg(Type.DOUBLE_TYPE);
        break;
      case Opcodes.ISHL:
        shl(Type.INT_TYPE);
        break;
      case Opcodes.LSHL:
        shl(Type.LONG_TYPE);
        break;
      case Opcodes.ISHR:
        shr(Type.INT_TYPE);
        break;
      case Opcodes.LSHR:
        shr(Type.LONG_TYPE);
        break;
      case Opcodes.IUSHR:
        ushr(Type.INT_TYPE);
        break;
      case Opcodes.LUSHR:
        ushr(Type.LONG_TYPE);
        break;
      case Opcodes.IAND:
        and(Type.INT_TYPE);
        break;
      case Opcodes.LAND:
        and(Type.LONG_TYPE);
        break;
      case Opcodes.IOR:
        or(Type.INT_TYPE);
        break;
      case Opcodes.LOR:
        or(Type.LONG_TYPE);
        break;
      case Opcodes.IXOR:
        xor(Type.INT_TYPE);
        break;
      case Opcodes.LXOR:
        xor(Type.LONG_TYPE);
        break;
      case Opcodes.I2L:
        cast(Type.INT_TYPE, Type.LONG_TYPE);
        break;
      case Opcodes.I2F:
        cast(Type.INT_TYPE, Type.FLOAT_TYPE);
        break;
      case Opcodes.I2D:
        cast(Type.INT_TYPE, Type.DOUBLE_TYPE);
        break;
      case Opcodes.L2I:
        cast(Type.LONG_TYPE, Type.INT_TYPE);
        break;
      case Opcodes.L2F:
        cast(Type.LONG_TYPE, Type.FLOAT_TYPE);
        break;
      case Opcodes.L2D:
        cast(Type.LONG_TYPE, Type.DOUBLE_TYPE);
        break;
      case Opcodes.F2I:
        cast(Type.FLOAT_TYPE, Type.INT_TYPE);
        break;
      case Opcodes.F2L:
        cast(Type.FLOAT_TYPE, Type.LONG_TYPE);
        break;
      case Opcodes.F2D:
        cast(Type.FLOAT_TYPE, Type.DOUBLE_TYPE);
        break;
      case Opcodes.D2I:
        cast(Type.DOUBLE_TYPE, Type.INT_TYPE);
        break;
      case Opcodes.D2L:
        cast(Type.DOUBLE_TYPE, Type.LONG_TYPE);
        break;
      case Opcodes.D2F:
        cast(Type.DOUBLE_TYPE, Type.FLOAT_TYPE);
        break;
      case Opcodes.I2B:
        cast(Type.INT_TYPE, Type.BYTE_TYPE);
        break;
      case Opcodes.I2C:
        cast(Type.INT_TYPE, Type.CHAR_TYPE);
        break;
      case Opcodes.I2S:
        cast(Type.INT_TYPE, Type.SHORT_TYPE);
        break;
      case Opcodes.LCMP:
        lcmp();
        break;
      case Opcodes.FCMPL:
        cmpl(Type.FLOAT_TYPE);
        break;
      case Opcodes.FCMPG:
        cmpg(Type.FLOAT_TYPE);
        break;
      case Opcodes.DCMPL:
        cmpl(Type.DOUBLE_TYPE);
        break;
      case Opcodes.DCMPG:
        cmpg(Type.DOUBLE_TYPE);
        break;
      case Opcodes.IRETURN:
        areturn(Type.INT_TYPE);
        break;
      case Opcodes.LRETURN:
        areturn(Type.LONG_TYPE);
        break;
      case Opcodes.FRETURN:
        areturn(Type.FLOAT_TYPE);
        break;
      case Opcodes.DRETURN:
        areturn(Type.DOUBLE_TYPE);
        break;
      case Opcodes.ARETURN:
        areturn(OBJECT_TYPE);
        break;
      case Opcodes.RETURN:
        areturn(Type.VOID_TYPE);
        break;
      case Opcodes.ARRAYLENGTH:
        arraylength();
        break;
      case Opcodes.ATHROW:
        athrow();
        break;
      case Opcodes.MONITORENTER:
        monitorenter();
        break;
      case Opcodes.MONITOREXIT:
        monitorexit();
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitIntInsn(final int opcode, final int operand) {
    switch (opcode) {
      case Opcodes.BIPUSH:
        iconst(operand);
        break;
      case Opcodes.SIPUSH:
        iconst(operand);
        break;
      case Opcodes.NEWARRAY:
        switch (operand) {
          case Opcodes.T_BOOLEAN:
            newarray(Type.BOOLEAN_TYPE);
            break;
          case Opcodes.T_CHAR:
            newarray(Type.CHAR_TYPE);
            break;
          case Opcodes.T_BYTE:
            newarray(Type.BYTE_TYPE);
            break;
          case Opcodes.T_SHORT:
            newarray(Type.SHORT_TYPE);
            break;
          case Opcodes.T_INT:
            newarray(Type.INT_TYPE);
            break;
          case Opcodes.T_FLOAT:
            newarray(Type.FLOAT_TYPE);
            break;
          case Opcodes.T_LONG:
            newarray(Type.LONG_TYPE);
            break;
          case Opcodes.T_DOUBLE:
            newarray(Type.DOUBLE_TYPE);
            break;
          default:
            throw new IllegalArgumentException();
        }
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitVarInsn(final int opcode, final int var) {
    switch (opcode) {
      case Opcodes.ILOAD:
        load(var, Type.INT_TYPE);
        break;
      case Opcodes.LLOAD:
        load(var, Type.LONG_TYPE);
        break;
      case Opcodes.FLOAD:
        load(var, Type.FLOAT_TYPE);
        break;
      case Opcodes.DLOAD:
        load(var, Type.DOUBLE_TYPE);
        break;
      case Opcodes.ALOAD:
        load(var, OBJECT_TYPE);
        break;
      case Opcodes.ISTORE:
        store(var, Type.INT_TYPE);
        break;
      case Opcodes.LSTORE:
        store(var, Type.LONG_TYPE);
        break;
      case Opcodes.FSTORE:
        store(var, Type.FLOAT_TYPE);
        break;
      case Opcodes.DSTORE:
        store(var, Type.DOUBLE_TYPE);
        break;
      case Opcodes.ASTORE:
        store(var, OBJECT_TYPE);
        break;
      case Opcodes.RET:
        ret(var);
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitTypeInsn(final int opcode, final String type) {
    Type objectType = Type.getObjectType(type);
    switch (opcode) {
      case Opcodes.NEW:
        anew(objectType);
        break;
      case Opcodes.ANEWARRAY:
        newarray(objectType);
        break;
      case Opcodes.CHECKCAST:
        checkcast(objectType);
        break;
      case Opcodes.INSTANCEOF:
        instanceOf(objectType);
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitFieldInsn(
      final int opcode, final String owner, final String name, final String descriptor) {
    switch (opcode) {
      case Opcodes.GETSTATIC:
        getstatic(owner, name, descriptor);
        break;
      case Opcodes.PUTSTATIC:
        putstatic(owner, name, descriptor);
        break;
      case Opcodes.GETFIELD:
        getfield(owner, name, descriptor);
        break;
      case Opcodes.PUTFIELD:
        putfield(owner, name, descriptor);
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitMethodInsn(
      final int opcodeAndSource,
      final String owner,
      final String name,
      final String descriptor,
      final boolean isInterface) {
    if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
      // Redirect the call to the deprecated version of this method.
      super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
      return;
    }
    int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;

    switch (opcode) {
      case Opcodes.INVOKESPECIAL:
        invokespecial(owner, name, descriptor, isInterface);
        break;
      case Opcodes.INVOKEVIRTUAL:
        invokevirtual(owner, name, descriptor, isInterface);
        break;
      case Opcodes.INVOKESTATIC:
        invokestatic(owner, name, descriptor, isInterface);
        break;
      case Opcodes.INVOKEINTERFACE:
        invokeinterface(owner, name, descriptor);
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitInvokeDynamicInsn(
      final String name,
      final String descriptor,
      final Handle bootstrapMethodHandle,
      final Object... bootstrapMethodArguments) {
    invokedynamic(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
  }

  @Override
  public void visitJumpInsn(final int opcode, final Label label) {
    switch (opcode) {
      case Opcodes.IFEQ:
        ifeq(label);
        break;
      case Opcodes.IFNE:
        ifne(label);
        break;
      case Opcodes.IFLT:
        iflt(label);
        break;
      case Opcodes.IFGE:
        ifge(label);
        break;
      case Opcodes.IFGT:
        ifgt(label);
        break;
      case Opcodes.IFLE:
        ifle(label);
        break;
      case Opcodes.IF_ICMPEQ:
        ificmpeq(label);
        break;
      case Opcodes.IF_ICMPNE:
        ificmpne(label);
        break;
      case Opcodes.IF_ICMPLT:
        ificmplt(label);
        break;
      case Opcodes.IF_ICMPGE:
        ificmpge(label);
        break;
      case Opcodes.IF_ICMPGT:
        ificmpgt(label);
        break;
      case Opcodes.IF_ICMPLE:
        ificmple(label);
        break;
      case Opcodes.IF_ACMPEQ:
        ifacmpeq(label);
        break;
      case Opcodes.IF_ACMPNE:
        ifacmpne(label);
        break;
      case Opcodes.GOTO:
        goTo(label);
        break;
      case Opcodes.JSR:
        jsr(label);
        break;
      case Opcodes.IFNULL:
        ifnull(label);
        break;
      case Opcodes.IFNONNULL:
        ifnonnull(label);
        break;
      default:
        throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitLabel(final Label label) {
    mark(label);
  }

  @Override
  public void visitLdcInsn(final Object value) {
    if (api < Opcodes.ASM5
        && (value instanceof Handle
            || (value instanceof Type && ((Type) value).getSort() == Type.METHOD))) {
      throw new UnsupportedOperationException("This feature requires ASM5");
    }
    if (api < Opcodes.ASM7 && value instanceof ConstantDynamic) {
      throw new UnsupportedOperationException("This feature requires ASM7");
    }
    if (value instanceof Integer) {
      iconst((Integer) value);
    } else if (value instanceof Byte) {
      iconst(((Byte) value).intValue());
    } else if (value instanceof Character) {
      iconst(((Character) value).charValue());
    } else if (value instanceof Short) {
      iconst(((Short) value).intValue());
    } else if (value instanceof Boolean) {
      iconst(((Boolean) value).booleanValue() ? 1 : 0);
    } else if (value instanceof Float) {
      fconst((Float) value);
    } else if (value instanceof Long) {
      lconst((Long) value);
    } else if (value instanceof Double) {
      dconst((Double) value);
    } else if (value instanceof String) {
      aconst(value);
    } else if (value instanceof Type) {
      tconst((Type) value);
    } else if (value instanceof Handle) {
      hconst((Handle) value);
    } else if (value instanceof ConstantDynamic) {
      cconst((ConstantDynamic) value);
    } else {
      throw new IllegalArgumentException();
    }
  }

  @Override
  public void visitIincInsn(final int var, final int increment) {
    iinc(var, increment);
  }

  @Override
  public void visitTableSwitchInsn(
      final int min, final int max, final Label dflt, final Label... labels) {
    tableswitch(min, max, dflt, labels);
  }

  @Override
  public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
    lookupswitch(dflt, keys, labels);
  }

  @Override
  public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
    multianewarray(descriptor, numDimensions);
  }

  // -----------------------------------------------------------------------------------------------

  
Generates a nop instruction. 
/** Generates a nop instruction. */
  public void nop() {
    mv.visitInsn(Opcodes.NOP);
  }

  
Generates the instruction to push the given value on the stack.

Params:
  • value – the constant to be pushed on the stack. This parameter must be an Integer, a Float, a Long, a Double, a String, a Type of OBJECT or ARRAY sort for .class constants, for classes whose version is 49, a Type of METHOD sort for MethodType, a Handle for MethodHandle constants, for classes whose version is 51 or a ConstantDynamic for a constant dynamic for classes whose version is 55.
/**
   * Generates the instruction to push the given value on the stack.
   *
   * @param value the constant to be pushed on the stack. This parameter must be an {@link Integer},
   *     a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link Type} of
   *     OBJECT or ARRAY sort for {@code .class} constants, for classes whose version is 49, a
   *     {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle constants,
   *     for classes whose version is 51 or a {@link ConstantDynamic} for a constant dynamic for
   *     classes whose version is 55.
   */
  public void aconst(final Object value) {
    if (value == null) {
      mv.visitInsn(Opcodes.ACONST_NULL);
    } else {
      mv.visitLdcInsn(value);
    }
  }

  
Generates the instruction to push the given value on the stack.

Params:
  • intValue – the constant to be pushed on the stack.
/**
   * Generates the instruction to push the given value on the stack.
   *
   * @param intValue the constant to be pushed on the stack.
   */
  public void iconst(final int intValue) {
    if (intValue >= -1 && intValue <= 5) {
      mv.visitInsn(Opcodes.ICONST_0 + intValue);
    } else if (intValue >= Byte.MIN_VALUE && intValue <= Byte.MAX_VALUE) {
      mv.visitIntInsn(Opcodes.BIPUSH, intValue);
    } else if (intValue >= Short.MIN_VALUE && intValue <= Short.MAX_VALUE) {
      mv.visitIntInsn(Opcodes.SIPUSH, intValue);
    } else {
      mv.visitLdcInsn(intValue);
    }
  }

  
Generates the instruction to push the given value on the stack.

Params:
  • longValue – the constant to be pushed on the stack.
/**
   * Generates the instruction to push the given value on the stack.
   *
   * @param longValue the constant to be pushed on the stack.
   */
  public void lconst(final long longValue) {
    if (longValue == 0L || longValue == 1L) {
      mv.visitInsn(Opcodes.LCONST_0 + (int) longValue);
    } else {
      mv.visitLdcInsn(longValue);
    }
  }

  
Generates the instruction to push the given value on the stack.

Params:
  • floatValue – the constant to be pushed on the stack.
/**
   * Generates the instruction to push the given value on the stack.
   *
   * @param floatValue the constant to be pushed on the stack.
   */
  public void fconst(final float floatValue) {
    int bits = Float.floatToIntBits(floatValue);
    if (bits == 0L || bits == 0x3F800000 || bits == 0x40000000) { // 0..2
      mv.visitInsn(Opcodes.FCONST_0 + (int) floatValue);
    } else {
      mv.visitLdcInsn(floatValue);
    }
  }

  
Generates the instruction to push the given value on the stack.

Params:
  • doubleValue – the constant to be pushed on the stack.
/**
   * Generates the instruction to push the given value on the stack.
   *
   * @param doubleValue the constant to be pushed on the stack.
   */
  public void dconst(final double doubleValue) {
    long bits = Double.doubleToLongBits(doubleValue);
    if (bits == 0L || bits == 0x3FF0000000000000L) { // +0.0d and 1.0d
      mv.visitInsn(Opcodes.DCONST_0 + (int) doubleValue);
    } else {
      mv.visitLdcInsn(doubleValue);
    }
  }

  
Generates the instruction to push the given type on the stack.

Params:
  • type – the type to be pushed on the stack.
/**
   * Generates the instruction to push the given type on the stack.
   *
   * @param type the type to be pushed on the stack.
   */
  public void tconst(final Type type) {
    mv.visitLdcInsn(type);
  }

  
Generates the instruction to push the given handle on the stack.

Params:
  • handle – the handle to be pushed on the stack.
/**
   * Generates the instruction to push the given handle on the stack.
   *
   * @param handle the handle to be pushed on the stack.
   */
  public void hconst(final Handle handle) {
    mv.visitLdcInsn(handle);
  }

  
Generates the instruction to push the given constant dynamic on the stack.

Params:
  • constantDynamic – the constant dynamic to be pushed on the stack.
/**
   * Generates the instruction to push the given constant dynamic on the stack.
   *
   * @param constantDynamic the constant dynamic to be pushed on the stack.
   */
  public void cconst(final ConstantDynamic constantDynamic) {
    mv.visitLdcInsn(constantDynamic);
  }

  public void load(final int var, final Type type) {
    mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), var);
  }

  public void aload(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IALOAD));
  }

  public void store(final int var, final Type type) {
    mv.visitVarInsn(type.getOpcode(Opcodes.ISTORE), var);
  }

  public void astore(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IASTORE));
  }

  public void pop() {
    mv.visitInsn(Opcodes.POP);
  }

  public void pop2() {
    mv.visitInsn(Opcodes.POP2);
  }

  public void dup() {
    mv.visitInsn(Opcodes.DUP);
  }

  public void dup2() {
    mv.visitInsn(Opcodes.DUP2);
  }

  public void dupX1() {
    mv.visitInsn(Opcodes.DUP_X1);
  }

  public void dupX2() {
    mv.visitInsn(Opcodes.DUP_X2);
  }

  public void dup2X1() {
    mv.visitInsn(Opcodes.DUP2_X1);
  }

  public void dup2X2() {
    mv.visitInsn(Opcodes.DUP2_X2);
  }

  public void swap() {
    mv.visitInsn(Opcodes.SWAP);
  }

  public void add(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IADD));
  }

  public void sub(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.ISUB));
  }

  public void mul(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IMUL));
  }

  public void div(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IDIV));
  }

  public void rem(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IREM));
  }

  public void neg(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.INEG));
  }

  public void shl(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.ISHL));
  }

  public void shr(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.ISHR));
  }

  public void ushr(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IUSHR));
  }

  public void and(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IAND));
  }

  public void or(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IOR));
  }

  public void xor(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IXOR));
  }

  public void iinc(final int var, final int increment) {
    mv.visitIincInsn(var, increment);
  }

  
Generates the instruction to cast from the first given type to the other.

Params:
  • from – a Type.
  • to – a Type.
/**
   * Generates the instruction to cast from the first given type to the other.
   *
   * @param from a Type.
   * @param to a Type.
   */
  public void cast(final Type from, final Type to) {
    cast(mv, from, to);
  }

  
Generates the instruction to cast from the first given type to the other.

Params:
  • methodVisitor – the method visitor to use to generate the instruction.
  • from – a Type.
  • to – a Type.
/**
   * Generates the instruction to cast from the first given type to the other.
   *
   * @param methodVisitor the method visitor to use to generate the instruction.
   * @param from a Type.
   * @param to a Type.
   */
  static void cast(final MethodVisitor methodVisitor, final Type from, final Type to) {
    if (from != to) {
      if (from == Type.DOUBLE_TYPE) {
        if (to == Type.FLOAT_TYPE) {
          methodVisitor.visitInsn(Opcodes.D2F);
        } else if (to == Type.LONG_TYPE) {
          methodVisitor.visitInsn(Opcodes.D2L);
        } else {
          methodVisitor.visitInsn(Opcodes.D2I);
          cast(methodVisitor, Type.INT_TYPE, to);
        }
      } else if (from == Type.FLOAT_TYPE) {
        if (to == Type.DOUBLE_TYPE) {
          methodVisitor.visitInsn(Opcodes.F2D);
        } else if (to == Type.LONG_TYPE) {
          methodVisitor.visitInsn(Opcodes.F2L);
        } else {
          methodVisitor.visitInsn(Opcodes.F2I);
          cast(methodVisitor, Type.INT_TYPE, to);
        }
      } else if (from == Type.LONG_TYPE) {
        if (to == Type.DOUBLE_TYPE) {
          methodVisitor.visitInsn(Opcodes.L2D);
        } else if (to == Type.FLOAT_TYPE) {
          methodVisitor.visitInsn(Opcodes.L2F);
        } else {
          methodVisitor.visitInsn(Opcodes.L2I);
          cast(methodVisitor, Type.INT_TYPE, to);
        }
      } else {
        if (to == Type.BYTE_TYPE) {
          methodVisitor.visitInsn(Opcodes.I2B);
        } else if (to == Type.CHAR_TYPE) {
          methodVisitor.visitInsn(Opcodes.I2C);
        } else if (to == Type.DOUBLE_TYPE) {
          methodVisitor.visitInsn(Opcodes.I2D);
        } else if (to == Type.FLOAT_TYPE) {
          methodVisitor.visitInsn(Opcodes.I2F);
        } else if (to == Type.LONG_TYPE) {
          methodVisitor.visitInsn(Opcodes.I2L);
        } else if (to == Type.SHORT_TYPE) {
          methodVisitor.visitInsn(Opcodes.I2S);
        }
      }
    }
  }

  public void lcmp() {
    mv.visitInsn(Opcodes.LCMP);
  }

  public void cmpl(final Type type) {
    mv.visitInsn(type == Type.FLOAT_TYPE ? Opcodes.FCMPL : Opcodes.DCMPL);
  }

  public void cmpg(final Type type) {
    mv.visitInsn(type == Type.FLOAT_TYPE ? Opcodes.FCMPG : Opcodes.DCMPG);
  }

  public void ifeq(final Label label) {
    mv.visitJumpInsn(Opcodes.IFEQ, label);
  }

  public void ifne(final Label label) {
    mv.visitJumpInsn(Opcodes.IFNE, label);
  }

  public void iflt(final Label label) {
    mv.visitJumpInsn(Opcodes.IFLT, label);
  }

  public void ifge(final Label label) {
    mv.visitJumpInsn(Opcodes.IFGE, label);
  }

  public void ifgt(final Label label) {
    mv.visitJumpInsn(Opcodes.IFGT, label);
  }

  public void ifle(final Label label) {
    mv.visitJumpInsn(Opcodes.IFLE, label);
  }

  public void ificmpeq(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ICMPEQ, label);
  }

  public void ificmpne(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ICMPNE, label);
  }

  public void ificmplt(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ICMPLT, label);
  }

  public void ificmpge(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ICMPGE, label);
  }

  public void ificmpgt(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ICMPGT, label);
  }

  public void ificmple(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ICMPLE, label);
  }

  public void ifacmpeq(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ACMPEQ, label);
  }

  public void ifacmpne(final Label label) {
    mv.visitJumpInsn(Opcodes.IF_ACMPNE, label);
  }

  public void goTo(final Label label) {
    mv.visitJumpInsn(Opcodes.GOTO, label);
  }

  public void jsr(final Label label) {
    mv.visitJumpInsn(Opcodes.JSR, label);
  }

  public void ret(final int var) {
    mv.visitVarInsn(Opcodes.RET, var);
  }

  public void tableswitch(final int min, final int max, final Label dflt, final Label... labels) {
    mv.visitTableSwitchInsn(min, max, dflt, labels);
  }

  public void lookupswitch(final Label dflt, final int[] keys, final Label[] labels) {
    mv.visitLookupSwitchInsn(dflt, keys, labels);
  }

  public void areturn(final Type type) {
    mv.visitInsn(type.getOpcode(Opcodes.IRETURN));
  }

  public void getstatic(final String owner, final String name, final String descriptor) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, owner, name, descriptor);
  }

  public void putstatic(final String owner, final String name, final String descriptor) {
    mv.visitFieldInsn(Opcodes.PUTSTATIC, owner, name, descriptor);
  }

  public void getfield(final String owner, final String name, final String descriptor) {
    mv.visitFieldInsn(Opcodes.GETFIELD, owner, name, descriptor);
  }

  public void putfield(final String owner, final String name, final String descriptor) {
    mv.visitFieldInsn(Opcodes.PUTFIELD, owner, name, descriptor);
  }

  
Deprecated.

Params:
  • owner – the internal name of the method's owner class.
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
Deprecated:use invokevirtual(String, String, String, boolean) instead.
/**
   * Deprecated.
   *
   * @param owner the internal name of the method's owner class.
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @deprecated use {@link #invokevirtual(String, String, String, boolean)} instead.
   */
  @Deprecated
  public void invokevirtual(final String owner, final String name, final String descriptor) {
    if (api >= Opcodes.ASM5) {
      invokevirtual(owner, name, descriptor, false);
      return;
    }
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, owner, name, descriptor);
  }

  
Generates the instruction to call the given virtual method.

Params:
  • owner – the internal name of the method's owner class (see Type.getInternalName()).
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • isInterface – if the method's owner class is an interface.
/**
   * Generates the instruction to call the given virtual method.
   *
   * @param owner the internal name of the method's owner class (see {@link
   *     Type#getInternalName()}).
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @param isInterface if the method's owner class is an interface.
   */
  public void invokevirtual(
      final String owner, final String name, final String descriptor, final boolean isInterface) {
    if (api < Opcodes.ASM5) {
      if (isInterface) {
        throw new IllegalArgumentException("INVOKEVIRTUAL on interfaces require ASM 5");
      }
      invokevirtual(owner, name, descriptor);
      return;
    }
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, owner, name, descriptor, isInterface);
  }

  
Deprecated.

Params:
  • owner – the internal name of the method's owner class.
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
Deprecated:use invokespecial(String, String, String, boolean) instead.
/**
   * Deprecated.
   *
   * @param owner the internal name of the method's owner class.
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @deprecated use {@link #invokespecial(String, String, String, boolean)} instead.
   */
  @Deprecated
  public void invokespecial(final String owner, final String name, final String descriptor) {
    if (api >= Opcodes.ASM5) {
      invokespecial(owner, name, descriptor, false);
      return;
    }
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, owner, name, descriptor, false);
  }

  
Generates the instruction to call the given special method.

Params:
  • owner – the internal name of the method's owner class (see Type.getInternalName()).
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • isInterface – if the method's owner class is an interface.
/**
   * Generates the instruction to call the given special method.
   *
   * @param owner the internal name of the method's owner class (see {@link
   *     Type#getInternalName()}).
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @param isInterface if the method's owner class is an interface.
   */
  public void invokespecial(
      final String owner, final String name, final String descriptor, final boolean isInterface) {
    if (api < Opcodes.ASM5) {
      if (isInterface) {
        throw new IllegalArgumentException("INVOKESPECIAL on interfaces require ASM 5");
      }
      invokespecial(owner, name, descriptor);
      return;
    }
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, owner, name, descriptor, isInterface);
  }

  
Deprecated.

Params:
  • owner – the internal name of the method's owner class.
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
Deprecated:use invokestatic(String, String, String, boolean) instead.
/**
   * Deprecated.
   *
   * @param owner the internal name of the method's owner class.
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @deprecated use {@link #invokestatic(String, String, String, boolean)} instead.
   */
  @Deprecated
  public void invokestatic(final String owner, final String name, final String descriptor) {
    if (api >= Opcodes.ASM5) {
      invokestatic(owner, name, descriptor, false);
      return;
    }
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, owner, name, descriptor, false);
  }

  
Generates the instruction to call the given static method.

Params:
  • owner – the internal name of the method's owner class (see Type.getInternalName()).
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • isInterface – if the method's owner class is an interface.
/**
   * Generates the instruction to call the given static method.
   *
   * @param owner the internal name of the method's owner class (see {@link
   *     Type#getInternalName()}).
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @param isInterface if the method's owner class is an interface.
   */
  public void invokestatic(
      final String owner, final String name, final String descriptor, final boolean isInterface) {
    if (api < Opcodes.ASM5) {
      if (isInterface) {
        throw new IllegalArgumentException("INVOKESTATIC on interfaces require ASM 5");
      }
      invokestatic(owner, name, descriptor);
      return;
    }
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, owner, name, descriptor, isInterface);
  }

  
Generates the instruction to call the given interface method.

Params:
  • owner – the internal name of the method's owner class (see Type.getInternalName()).
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
/**
   * Generates the instruction to call the given interface method.
   *
   * @param owner the internal name of the method's owner class (see {@link
   *     Type#getInternalName()}).
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   */
  public void invokeinterface(final String owner, final String name, final String descriptor) {
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, owner, name, descriptor, true);
  }

  
Generates the instruction to call the given dynamic method.

Params:
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • bootstrapMethodHandle – the bootstrap method.
  • bootstrapMethodArguments – the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type, Handle or ConstantDynamic value. This method is allowed to modify the content of the array so a caller should expect that this array may change.
/**
   * Generates the instruction to call the given dynamic method.
   *
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link Type}).
   * @param bootstrapMethodHandle the bootstrap method.
   * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
   *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
   *     Type}, {@link Handle} or {@link ConstantDynamic} value. This method is allowed to modify
   *     the content of the array so a caller should expect that this array may change.
   */
  public void invokedynamic(
      final String name,
      final String descriptor,
      final Handle bootstrapMethodHandle,
      final Object[] bootstrapMethodArguments) {
    mv.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
  }

  public void anew(final Type type) {
    mv.visitTypeInsn(Opcodes.NEW, type.getInternalName());
  }

  
Generates the instruction to create and push on the stack an array of the given type.

Params:
  • type – an array Type.
/**
   * Generates the instruction to create and push on the stack an array of the given type.
   *
   * @param type an array Type.
   */
  public void newarray(final Type type) {
    newarray(mv, type);
  }

  
Generates the instruction to create and push on the stack an array of the given type.

Params:
  • methodVisitor – the method visitor to use to generate the instruction.
  • type – an array Type.
/**
   * Generates the instruction to create and push on the stack an array of the given type.
   *
   * @param methodVisitor the method visitor to use to generate the instruction.
   * @param type an array Type.
   */
  static void newarray(final MethodVisitor methodVisitor, final Type type) {
    int arrayType;
    switch (type.getSort()) {
      case Type.BOOLEAN:
        arrayType = Opcodes.T_BOOLEAN;
        break;
      case Type.CHAR:
        arrayType = Opcodes.T_CHAR;
        break;
      case Type.BYTE:
        arrayType = Opcodes.T_BYTE;
        break;
      case Type.SHORT:
        arrayType = Opcodes.T_SHORT;
        break;
      case Type.INT:
        arrayType = Opcodes.T_INT;
        break;
      case Type.FLOAT:
        arrayType = Opcodes.T_FLOAT;
        break;
      case Type.LONG:
        arrayType = Opcodes.T_LONG;
        break;
      case Type.DOUBLE:
        arrayType = Opcodes.T_DOUBLE;
        break;
      default:
        methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, type.getInternalName());
        return;
    }
    methodVisitor.visitIntInsn(Opcodes.NEWARRAY, arrayType);
  }

  public void arraylength() {
    mv.visitInsn(Opcodes.ARRAYLENGTH);
  }

  public void athrow() {
    mv.visitInsn(Opcodes.ATHROW);
  }

  public void checkcast(final Type type) {
    mv.visitTypeInsn(Opcodes.CHECKCAST, type.getInternalName());
  }

  public void instanceOf(final Type type) {
    mv.visitTypeInsn(Opcodes.INSTANCEOF, type.getInternalName());
  }

  public void monitorenter() {
    mv.visitInsn(Opcodes.MONITORENTER);
  }

  public void monitorexit() {
    mv.visitInsn(Opcodes.MONITOREXIT);
  }

  public void multianewarray(final String descriptor, final int numDimensions) {
    mv.visitMultiANewArrayInsn(descriptor, numDimensions);
  }

  public void ifnull(final Label label) {
    mv.visitJumpInsn(Opcodes.IFNULL, label);
  }

  public void ifnonnull(final Label label) {
    mv.visitJumpInsn(Opcodes.IFNONNULL, label);
  }

  public void mark(final Label label) {
    mv.visitLabel(label);
  }
}