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javax.ide.extension
Class ExtensionDependency  

java.lang.Object
  javax.ide.extension.ExtensionDependency

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public final class ExtensionDependency

extends java.lang.Object

Represents an extension's dependency on some other extension.

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Field Summary
private  java.lang.String	_id
private  javax.ide.util.Version	_maxVersion
private  javax.ide.util.Version	_minVersion

 

Constructor Summary

ExtensionDependency(java.lang.String id)           Constructs a dependency for any version of the specified extension id.

ExtensionDependency(java.lang.String id, javax.ide.util.Version min, javax.ide.util.Version max)           Constructs a dependency between two versions of the specified extension id.

 

Method Summary
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
java.lang.String	getID()           Get the id of the extension this dependency is for.
javax.ide.util.Version	getMaximumVersion()           Get the maximum version of the extension this dependency is for.
javax.ide.util.Version	getMinimumVersion()           Get the minimum version of the extension this dependency is for.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
java.lang.String	toString()           Get a string representation of this dependency.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

_id

private final java.lang.String _id

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_minVersion

private final javax.ide.util.Version _minVersion

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_maxVersion

private final javax.ide.util.Version _maxVersion

Constructor Detail

ExtensionDependency

public ExtensionDependency(java.lang.String id)

Constructs a dependency for any version of the specified extension id.

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ExtensionDependency

public ExtensionDependency(java.lang.String id,
                           javax.ide.util.Version min,
                           javax.ide.util.Version max)

Constructs a dependency between two versions of the specified extension id.

Method Detail

getID

public java.lang.String getID()

Get the id of the extension this dependency is for.

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getMinimumVersion

public javax.ide.util.Version getMinimumVersion()

Get the minimum version of the extension this dependency is for.

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getMaximumVersion

public javax.ide.util.Version getMaximumVersion()

Get the maximum version of the extension this dependency is for.

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toString

public java.lang.String toString()

Get a string representation of this dependency.

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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)

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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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