Class Location

public Location(VMMethod method,
                long index)

Create a location with the given parameters.

Parameters:

method - the method

index - location in the method

public Location(ByteBuffer bb)
            throws IOException,
                   JdwpException

Read a location from the given bytebuffer, consists of a TAG (byte), followed by a ReferenceTypeId, a MethodId and an index (long).

Parameters:

bb - this holds the location

Throws:

IOException - when an error occurs reading from the buffer

JdwpException - for invalid class or method IDs

public boolean equals(Object obj)

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 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 NullPointerException.

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

The default implementation returns this == o.

Overrides:

equals in interface Object

Parameters:

obj - the Object to compare to

Returns:

whether this Object is semantically equal to another

See Also:

Object.hashCode()

public static Location getEmptyLocation()

Sets up an empty location

Returns:

new Location (setup as empty)

public long getIndex()

Gets the code index of this location

Returns:

the code index

public VMMethod getMethod()

Gets the method of this location

Returns:

the method

public String toString()

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() and such.

It is typical, but not required, to ensure that this method never completes abruptly with a 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()).

Overrides:

toString in interface Object

Returns:

the String representing this Object, which may be null

See Also:

getClass(), Object.hashCode(), Class.getName(), Integer.toHexString(int)

public void write(DataOutputStream os)
            throws IOException

Write the given location to an output stream.

Parameters:

os - stream to write to

Throws:

IOException - when an error occurs writing to the stream