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org.apache.bcel.generic
Class Type  

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

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

BasicType, ReferenceType, ReturnaddressType

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public abstract class Type

extends java.lang.Object

implements java.io.Serializable

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

Version:

$Id: Type.java 393344 2006-04-12 00:38:34Z tcurdt $

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Field Summary
static BasicType	BOOLEAN
static BasicType	BYTE
static BasicType	CHAR
static ObjectType	CLASS
private static java.lang.ThreadLocal	consumed_chars
static BasicType	DOUBLE
static BasicType	FLOAT
static BasicType	INT
static BasicType	LONG
static Type[]	NO_ARGS
static ReferenceType	NULL
static ObjectType	OBJECT
static BasicType	SHORT
protected  java.lang.String	signature
static ObjectType	STRING
static ObjectType	STRINGBUFFER
static ObjectType	THROWABLE
protected  byte	type
static Type	UNKNOWN
static BasicType	VOID           Predefined constants

 

Constructor Summary
protected	Type(byte t, java.lang.String s)

 

Method Summary
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
static Type[]	getArgumentTypes(java.lang.String signature)           Convert arguments of a method (signature) to an array of Type objects.
static java.lang.String	getMethodSignature(Type return_type, Type[] arg_types)           Convert type to Java method signature, e.g.
static Type	getReturnType(java.lang.String signature)           Convert return value of a method (signature) to a Type object.
java.lang.String	getSignature()
static java.lang.String	getSignature(java.lang.reflect.Method meth)
int	getSize()
byte	getType()
static Type	getType(java.lang.Class cl)           Convert runtime java.lang.Class to BCEL Type object.
static Type	getType(java.lang.String signature)           Convert signature to a Type object.
static Type[]	getTypes(java.lang.Class[] classes)           Convert runtime java.lang.Class[] to BCEL Type objects.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
java.lang.String	toString()           Convert this Object to a human-readable String.
private static int	unwrap(java.lang.ThreadLocal tl)
private static void	wrap(java.lang.ThreadLocal tl, int value)

 

Methods inherited from class java.lang.Object

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

 

Field Detail

type

protected byte type

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signature

protected java.lang.String signature

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VOID

public static final BasicType VOID

Predefined constants

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BOOLEAN

public static final BasicType BOOLEAN

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INT

public static final BasicType INT

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SHORT

public static final BasicType SHORT

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BYTE

public static final BasicType BYTE

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LONG

public static final BasicType LONG

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DOUBLE

public static final BasicType DOUBLE

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FLOAT

public static final BasicType FLOAT

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CHAR

public static final BasicType CHAR

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OBJECT

public static final ObjectType OBJECT

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CLASS

public static final ObjectType CLASS

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STRING

public static final ObjectType STRING

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STRINGBUFFER

public static final ObjectType STRINGBUFFER

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THROWABLE

public static final ObjectType THROWABLE

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NO_ARGS

public static final Type[] NO_ARGS

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NULL

public static final ReferenceType NULL

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UNKNOWN

public static final Type UNKNOWN

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consumed_chars

private static java.lang.ThreadLocal consumed_chars

Constructor Detail

Type

protected Type(byte t,
               java.lang.String s)

Method Detail

hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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equals

public boolean equals(java.lang.Object o)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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getSignature

public java.lang.String getSignature()

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getType

public byte getType()

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getSize

public int getSize()

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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getMethodSignature

public static java.lang.String getMethodSignature(Type return_type,
                                                  Type[] arg_types)

Convert type to Java method signature, e.g. int[] f(java.lang.String x) becomes (Ljava/lang/String;)[I

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unwrap

private static int unwrap(java.lang.ThreadLocal tl)

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wrap

private static void wrap(java.lang.ThreadLocal tl,
                         int value)

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getType

public static final Type getType(java.lang.String signature)
                          throws java.lang.StringIndexOutOfBoundsException

Convert signature to a Type object.

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getReturnType

public static Type getReturnType(java.lang.String signature)

Convert return value of a method (signature) to a Type object.

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getArgumentTypes

public static Type[] getArgumentTypes(java.lang.String signature)

Convert arguments of a method (signature) to an array of Type objects.

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getType

public static Type getType(java.lang.Class cl)

Convert runtime java.lang.Class to BCEL Type object.

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getTypes

public static Type[] getTypes(java.lang.Class[] classes)

Convert runtime java.lang.Class[] to BCEL Type objects.

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getSignature

public static java.lang.String getSignature(java.lang.reflect.Method meth)

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> bcel >> [ generic overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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