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Clazz
Class jq_LineNumberBC  

java.lang.Object
  Clazz.jq_LineNumberBC

All Implemented Interfaces:

java.lang.Comparable

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public class jq_LineNumberBC

extends java.lang.Object

implements java.lang.Comparable

This class matches bytecode indices to line numbers. It implements the Comparable interface; objects are compared based on their starting bytecode indices.

Version:

$Id: jq_LineNumberBC.java,v 1.4 2003/05/12 10:05:12 joewhaley Exp $

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Field Summary
private  char	lineNum           Corresponding line number.
private  char	startPC           Starting bytecode index, inclusive.

 

Constructor Summary

jq_LineNumberBC(char startPC, char lineNum)           Constructs a new jq_LineNumberBC object with the given starting bytecode index and line number.

 

Method Summary
int	compareTo(jq_LineNumberBC that)           Compares this jq_LineNumberBC object to the given jq_LineNumberBC object.
int	compareTo(java.lang.Object that)           Compares this object with another, and returns a numerical result based on the comparison.
boolean	equals(jq_LineNumberBC that)           Compares this jq_LineNumberBC object to the given jq_LineNumberBC object.
boolean	equals(java.lang.Object that)           Determine whether this Object is semantically equal to another Object.
char	getLineNum()           Returns the line number.
char	getStartPC()           Returns the start bytecode index.
java.lang.String	toString()           Returns a string representation of this jq_LineNumberBC object.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

startPC

private char startPC

Starting bytecode index, inclusive.

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lineNum

private char lineNum

Corresponding line number.

Constructor Detail

jq_LineNumberBC

public jq_LineNumberBC(char startPC,
                       char lineNum)

Constructs a new jq_LineNumberBC object with the given starting bytecode index and line number. The starting bytecode index is inclusive.

Method Detail

getStartPC

public char getStartPC()

Returns the start bytecode index.

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getLineNum

public char getLineNum()

Returns the line number.

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compareTo

public int compareTo(jq_LineNumberBC that)

Compares this jq_LineNumberBC object to the given jq_LineNumberBC object. Comparisons are based on the start bytecode index value.

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compareTo

public int compareTo(java.lang.Object that)

Description copied from interface: java.lang.Comparable

Compares this object with another, and returns a numerical result based on the comparison. If the result is negative, this object sorts less than the other; if 0, the two are equal, and if positive, this object sorts greater than the other. To translate this into boolean, simply perform o1.compareTo(o2) <op> 0, where op is one of <, <=, =, !=, >, or >=.

You must make sure that the comparison is mutual, ie. sgn(x.compareTo(y)) == -sgn(y.compareTo(x)) (where sgn() is defined as -1, 0, or 1 based on the sign). This includes throwing an exception in either direction if the two are not comparable; hence, compareTo(null) should always throw an Exception.

You should also ensure transitivity, in two forms: x.compareTo(y) > 0 && y.compareTo(z) > 0 implies x.compareTo(z) > 0; and x.compareTo(y) == 0 implies x.compareTo(z) == y.compareTo(z).

Specified by:

compareTo in interface java.lang.Comparable

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equals

public boolean equals(jq_LineNumberBC that)

Compares this jq_LineNumberBC object to the given jq_LineNumberBC object. Comparisons are based on the start bytecode index value.

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equals

public boolean equals(java.lang.Object that)

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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toString

public java.lang.String toString()

Returns a string representation of this jq_LineNumberBC object.

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