org.apache.torque.generator.qname
Class QualifiedName

java.lang.Object
  org.apache.torque.generator.qname.QualifiedName

public final class QualifiedName
extends Object

This class contains a name which has a namespace. The namespace defines the scope where the name is valid, and is made up of hierarchical bits separated by a dot (SEPARATOR). A qualified name is in the scope of its own namespace and all children namespaces of its own namespace (i.e. the namespaces "deeper down" the hierarchy). For example, the namespace org.apache.torque is in the scope of org.apache but not in the scope of org.apache.torque.generator. As a special case, if the namespace is the empty String, the name is valid in all namespaces. The namespace and the name are also separated by a dot (SEPARATOR). Instances of this class are immutable. To prevent mutable subclasses, this class is final.

Field Summary

static char

SEPARATOR The separator between namespace parts and between namespacee and local name in the string representation of a QualifiedName.

Constructor Summary

QualifiedName(String qualifiedName)
Creates a QualifiedName from its string representation, which is namespace:name.

QualifiedName(String nameOrQualifiedName, Namespace defaultNamespace)
Creates a QualifiedName from a fully qualified name or the name and the namespace parts of a QualifiedName.

QualifiedName(String nameOrQualifiedName, String defaultNamespace)
Creates a QualifiedName from a fully qualified name or the name and the namespace parts of a QualifiedName.

Method Summary

boolean	equals(Object o) Returns if this object equals another object.
String	getName() Returns the name part of the QualifiedName.
Namespace	getNamespace() Returns the namespace of the QualifiedName.
Namespace	getParentNamespace() Returns the parent of the Qualified name's namespace.
int	hashCode() Returns a hashcode for the QualifiedName.
boolean	isInRootNamespace() Returns if the namespace of this qualified name is the root namespace.
boolean	isVisibleFrom(Namespace otherNamespace) Returns if this qualified name is visible from another namespace.
String	toString() Returns the String representation of the QualifiedName, which is namespace.name if namespace is not empty, or name if namespace is empty.

Methods inherited from class java.lang.Object

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

Field Detail

SEPARATOR

public static final char SEPARATOR

The separator between namespace parts and between namespacee and local name in the string representation of a QualifiedName.

See Also:

Constant Field Values

Constructor Detail

QualifiedName

public QualifiedName(String qualifiedName)

Creates a QualifiedName from its string representation, which is namespace:name. The namespace part may be empty (in which case the default namespace is used), but not the name part.

Parameters:

qualifiedName - the string representation of the QualifiedName, must contain a non-empty name part.

Throws:

NullPointerException - if qualifiedName is null

QualifiedName

public QualifiedName(String nameOrQualifiedName,
                     String defaultNamespace)

Creates a QualifiedName from a fully qualified name or the name and the namespace parts of a QualifiedName.

Parameters:

nameOrQualifiedName - either the name part of the QualifiedName, or a fully qualified name. May not be null and must contain an non-empty name part.

defaultNamespace - the namespace of the QualifiedName, may be null if nameOrQualifiedName has a namespace part.

Throws:

IllegalArgumentException - if name has an empty name part, or if no namespace is found (nameOrQualifiedName has no namespace part and defaultNamespace is null)

QualifiedName

public QualifiedName(String nameOrQualifiedName,
                     Namespace defaultNamespace)

Creates a QualifiedName from a fully qualified name or the name and the namespace parts of a QualifiedName.

Parameters:

nameOrQualifiedName - either the name part of the QualifiedName, or a fully qualified name. May not be null and must contain an non-empty name part.

defaultNamespace - the namespace of the QualifiedName, may be null if nameOrQualifiedName has a namespace part.

Throws:

IllegalArgumentException - if name has an empty name part, or if no namespace is found (nameOrQualifiedName has no namespace part and defaultNamespace is null)

Method Detail

getName

public String getName()

Returns the name part of the QualifiedName.

Returns:

the name part of the QualifiedName, never null.

getNamespace

public Namespace getNamespace()

Returns the namespace of the QualifiedName.

Returns:

the namespace of the QualifiedName, may be null.

isVisibleFrom

public boolean isVisibleFrom(Namespace otherNamespace)

Returns if this qualified name is visible from another namespace. This is true if the namespace is a "child" of this qualified name's namespace. Note that for being a child, all the parts of the namespace separated by a dot must be equal. For example, "org.apache.torque:name" is visible from the namespaces quot;org.apache.torque.generator" and quot;org.apache.torque", but not from "org.apache".

Parameters:

otherNamespace - the namespace against this QualifiedName should be checked, not null.

Returns:

true if this QualifiedName is visible from the given namespace, false otherwise.

Throws:

NullPointerException - if otherNamespace is null.

getParentNamespace

public Namespace getParentNamespace()

Returns the parent of the Qualified name's namespace. If this qualified name is in the root namespace, the root namespace is returned.

Returns:

the parent namespace of the qualified name's namespace, never null.

See Also:

Namespace.getParent()

isInRootNamespace

public boolean isInRootNamespace()

Returns if the namespace of this qualified name is the root namespace.

Returns:

true if the namespace is the root namespace, false otherwise.

toString

public String toString()

Returns the String representation of the QualifiedName, which is namespace.name if namespace is not empty, or name if namespace is empty.

Overrides:

toString in class Object

Returns:

a String representation of the QualifiedName.

equals

public boolean equals(Object o)

Returns if this object equals another object. This is the case if the other object is also a QualifiedName and its name and namespace are the same as this object's name and namespace.

Overrides:

equals in class Object

Parameters:

o - the other object to compare this object to.

Returns:

true if this object equals the other object, false otherwise.

See Also:

Object.equals(Object)

hashCode

public int hashCode()

Returns a hashcode for the QualifiedName. The hashcode is consistent with equals.

Overrides:

hashCode in class Object

Returns:

a hashcode for the qualified name.

See Also:

Object.hashCode()