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org.apache.bcel.generic
Class BasicType  

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

All Implemented Interfaces:

java.io.Serializable

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public final class BasicType

extends Type

Denotes basic type such as int.

Version:

$Id: BasicType.java 386056 2006-03-15 11:31:56Z tcurdt $

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Field Summary

 

Fields inherited from class org.apache.bcel.generic.Type

BOOLEAN, BYTE, CHAR, CLASS, DOUBLE, FLOAT, INT, LONG, NO_ARGS, NULL, OBJECT, SHORT, signature, STRING, STRINGBUFFER, THROWABLE, type, UNKNOWN, VOID

 

Constructor Summary
(package private)	BasicType(byte type)           Constructor for basic types such as int, long, `void'

 

Method Summary
boolean	equals(java.lang.Object _type)           Determine whether this Object is semantically equal to another Object.
static BasicType	getType(byte type)
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.

 

Methods inherited from class org.apache.bcel.generic.Type

getArgumentTypes, getMethodSignature, getReturnType, getSignature, getSignature, getSize, getType, getType, getType, getTypes, toString

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

BasicType

BasicType(byte type)

Constructor for basic types such as int, long, `void'

Method Detail

getType

public static final BasicType getType(byte type)

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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)

Overrides:

hashCode in class Type

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equals

public boolean equals(java.lang.Object _type)

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.

Overrides:

equals in class Type

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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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