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 superclass for all possible Java types, namely basic types such as int, object types like String and array types, for example int[]

  • Field Details

    • VOID

      public static final BasicType VOID
      Predefined constants

    • BOOLEAN

      public static final BasicType BOOLEAN
      Predefined constant for boolean type.

    • INT

      public static final BasicType INT
      Predefined constant for int type.

    • SHORT

      public static final BasicType SHORT
      Predefined constant for short type.

    • BYTE

      public static final BasicType BYTE
      Predefined constant for byte type.

    • LONG

      public static final BasicType LONG
      Predefined constant for long type.

    • DOUBLE

      public static final BasicType DOUBLE
      Predefined constant for double type.

    • FLOAT

      public static final BasicType FLOAT
      Predefined constant for float type.

    • CHAR

      public static final BasicType CHAR
      Predefined constant for char type.

    • OBJECT

      public static final ObjectType OBJECT
      Predefined constant for Object type.

    • CLASS

      public static final ObjectType CLASS
      Predefined constant for Class type.

    • STRING

      public static final ObjectType STRING
      Predefined constant for String type.

    • STRINGBUFFER

      public static final ObjectType STRINGBUFFER
      Predefined constant for StringBuffer type.

    • THROWABLE

      public static final ObjectType THROWABLE
      Predefined constant for Throwable type.

    • NO_ARGS

      public static final Type[] NO_ARGS
      Empty array.

    • NULL

      public static final ReferenceType NULL
      Predefined constant for null type.

    • UNKNOWN

      public static final Type UNKNOWN
      Predefined constant for unknown type.

    • 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 Details

    • Type

      protected Type(byte type, String signature)
      Constructs a Type.
      Parameters:
      type - The type constant.
      signature - The type signature.

  • Method Details

    • getArgumentTypes

      public static Type[] getArgumentTypes(String signature)
      Gets the argument types of a method from its signature as 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)
      Gets the Java method signature for the given types, for example, 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)
      Gets the return type of a method from its signature as a Type object.
      Parameters:
      signature - signature string such as (Ljava/lang/String;)V.
      Returns:
      return type.

    • getSignature

      public static String getSignature(Method meth)
      Gets the signature for a method.
      Parameters:
      meth - The method.
      Returns:
      The method signature.

    • getType

      public static Type getType(Class<?> cls)
      Gets the BCEL Type object corresponding to a runtime Class.
      Parameters:
      cls - Java class.
      Returns:
      corresponding Type object.

    • getType

      public static Type getType(String signature) throws StringIndexOutOfBoundsException
      Gets the Type object corresponding to a signature.
      Parameters:
      signature - signature string such as Ljava/lang/String;.
      Returns:
      type object.
      Throws:
      StringIndexOutOfBoundsException

    • getTypes

      public static Type[] getTypes(Class<?>[] classes)
      Gets the BCEL Type objects corresponding to an array of runtime classes.
      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.

    • getClassName

      public String getClassName()
      Gets the class name.
      Returns:
      The class name.

    • getSignature

      public String getSignature()
      Gets the signature for this type.
      Returns:
      signature for given type.

    • getSize

      public int getSize()
      Gets the stack size of this type.
      Returns:
      stack size of this type (2 for long and double, 0 for void, 1 otherwise).

    • getType

      public byte getType()
      Gets the type as defined in Constants.
      Returns:
      type as defined in Constants.

    • hashCode

      public int hashCode()
      Gets the hash code of this Type.
      Overrides:
      hashCode in class Object
      Returns:
      hash code 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.
      Returns:
      The normalized type.
      Since:
      6.0

    • toString

      public String toString()
      Overrides:
      toString in class Object
      Returns:
      Type string, for example 'int[]'.