Type (Apache Commons BCEL 6.6.1 API)

org.apache.bcel.generic

## Class Type

- java.lang.Object
- - org.apache.bcel.generic.Type

- Direct Known Subclasses:
    BasicType, DOUBLE_Upper, LONG_Upper, ReferenceType, ReturnaddressType

      public abstract class Type
      extends Object

  Abstract super class for all possible java types, namely basic types such as int, object types like String and array types, e.g. int[]

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static BasicType` | `BOOLEAN`
    `static BasicType` | `BYTE`
    `static BasicType` | `CHAR`
    `static ObjectType` | `CLASS`
    `static BasicType` | `DOUBLE`
    `static BasicType` | `FLOAT`
    `static BasicType` | `INT`
    `static BasicType` | `LONG`
    `static Type[]` | `NO_ARGS` Empty array.
    `static ReferenceType` | `NULL`
    `static ObjectType` | `OBJECT`
    `static BasicType` | `SHORT`
    `protected String` | `signature` Deprecated. (since 6.0) will be made private; do not access directly, use getter/setter
    `static ObjectType` | `STRING`
    `static ObjectType` | `STRINGBUFFER`
    `static ObjectType` | `THROWABLE`
    `protected byte` | `type` Deprecated. (since 6.0) will be made private; do not access directly, use getter/setter
    `static Type` | `UNKNOWN`
    `static BasicType` | `VOID` Predefined constants

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `Type(byte t, String s)`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object o)`
    `static Type[]` | `getArgumentTypes(String signature)` Convert arguments of a method (signature) to an array of Type objects.
    `static String` | `getMethodSignature(Type returnType, Type[] argTypes)` Convert type to Java method signature, e.g.
    `static Type` | `getReturnType(String signature)` Convert return value of a method (signature) to a Type object.
    `String` | `getSignature()`
    `static String` | `getSignature(Method meth)`
    `int` | `getSize()`
    `byte` | `getType()`
    `static Type` | `getType(Class<?> cls)` Convert runtime java.lang.Class to BCEL Type object.
    `static Type` | `getType(String signature)` Convert signature to a Type object.
    `static Type[]` | `getTypes(Class<?>[] classes)` Convert runtime java.lang.Class[] to BCEL Type objects.
    `int` | `hashCode()`
    `Type` | `normalizeForStackOrLocal()` boolean, short and char variable are considered as int in the stack or local variable area.
    `String` | `toString()`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### VOID

          public static final BasicType VOID

      Predefined constants

    - #### BOOLEAN

          public static final BasicType BOOLEAN

    - #### INT

          public static final BasicType INT

    - #### SHORT

          public static final BasicType SHORT

    - #### BYTE

          public static final BasicType BYTE

    - #### LONG

          public static final BasicType LONG

    - #### DOUBLE

          public static final BasicType DOUBLE

    - #### FLOAT

          public static final BasicType FLOAT

    - #### CHAR

          public static final BasicType CHAR

    - #### OBJECT

          public static final ObjectType OBJECT

    - #### CLASS

          public static final ObjectType CLASS

    - #### STRING

          public static final ObjectType STRING

    - #### STRINGBUFFER

          public static final ObjectType STRINGBUFFER

    - #### THROWABLE

          public static final ObjectType THROWABLE

    - #### NO_ARGS

          public static final Type[] NO_ARGS

      Empty array.

    - #### NULL

          public static final ReferenceType NULL

    - #### UNKNOWN

          public static final Type UNKNOWN

    - #### type

          @Deprecated
          protected byte type

      Deprecated. (since 6.0) will be made private; do not access directly, use getter/setter

    - #### signature

          @Deprecated
          protected String signature

      Deprecated. (since 6.0) will be made private; do not access directly, use getter/setter

  - ### Constructor Detail

    - #### Type

          protected Type(byte t,
                         String s)

  - ### Method Detail

    - #### getArgumentTypes

          public static Type[] getArgumentTypes(String signature)

      Convert arguments of a method (signature) to an array of Type objects.
      Parameters:
        `signature` - signature string such as (Ljava/lang/String;)V
      Returns:
        array of argument types

    - #### getMethodSignature

          public static String getMethodSignature(Type returnType,
                                                  Type[] argTypes)

      Convert type to Java method signature, e.g. int[] f(java.lang.String x) becomes (Ljava/lang/String;)[I
      Parameters:
        `returnType` - what the method returns
        `argTypes` - what are the argument types
      Returns:
        method signature for given type(s).

    - #### getReturnType

          public static Type getReturnType(String signature)

      Convert return value of a method (signature) to a Type object.
      Parameters:
        `signature` - signature string such as (Ljava/lang/String;)V
      Returns:
        return type

    - #### getSignature

          public static String getSignature(Method meth)

    - #### getType

          public static Type getType(Class<?> cls)

      Convert runtime java.lang.Class to BCEL Type object.
      Parameters:
        `cls` - Java class
      Returns:
        corresponding Type object

    - #### getType

          public static Type getType(String signature)
                              throws StringIndexOutOfBoundsException

      Convert signature to a Type object.
      Parameters:
        `signature` - signature string such as Ljava/lang/String;
      Returns:
        type object
      Throws:
        `StringIndexOutOfBoundsException`

    - #### getTypes

          public static Type[] getTypes(Class<?>[] classes)

      Convert runtime java.lang.Class[] to BCEL Type objects.
      Parameters:
        `classes` - an array of runtime class objects
      Returns:
        array of corresponding Type objects

    - #### equals

          public boolean equals(Object o)

      Overrides:
        `equals` in class `Object`
      Returns:
        whether the Types are equal

    - #### getSignature

          public String getSignature()

      Returns:
        signature for given type.

    - #### getSize

          public int getSize()

      Returns:
        stack size of this type (2 for long and double, 0 for void, 1 otherwise)

    - #### getType

          public byte getType()

      Returns:
        type as defined in Constants

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`
      Returns:
        hashcode of Type

    - #### normalizeForStackOrLocal

          public Type normalizeForStackOrLocal()

      boolean, short and char variable are considered as int in the stack or local variable area. Returns `INT` for `BOOLEAN`, `SHORT` or `CHAR`, otherwise returns the given type.
      Since:
        6.0

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`
      Returns:
        Type string, e.g. `int[]'

Copyright © 2004–2022 The Apache Software Foundation. All rights reserved.