com.goldencode.p2j.persist

Class BufferManager.StaticDefinitionKey

java.lang.Object

com.goldencode.p2j.persist.BufferManager.StaticDefinitionKey

Enclosing class:

BufferManager

private class BufferManager.StaticDefinitionKey
extends java.lang.Object

A temp-table key contains the lowercase legacy name of the dataset/table and the procedure where it was created. This way we can be sure there are no collisions between datasets/temp tables having the same name but created by different procedures.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Class<?>	def The Java class defining this table.
private int	hash The hash value is computed when the key is created.
private java.lang.String	legacyName The lowercased temp-table legacy name.
private java.lang.Object	parentProcedure The parent procedure where the temp-table was created.

Constructor Summary

Constructors

Constructor and Description
StaticDefinitionKey(java.lang.String legacyName, java.lang.Object parentProcedure, java.lang.Class<?> def) The contructors copies the parameters to internal data and computed the hash value.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Checks whether the alien object is equals to this one.
int	hashCode() Obtain the hash code as it was computed in the constructor.

Methods inherited from class java.lang.Object

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

Field Detail

legacyName

private final java.lang.String legacyName

The lowercased temp-table legacy name.

parentProcedure

private final java.lang.Object parentProcedure

The parent procedure where the temp-table was created.

def

private final java.lang.Class<?> def

The Java class defining this table.

hash

private final int hash

The hash value is computed when the key is created. These keys are immutable so the hash is computed only once and cached.

Constructor Detail

StaticDefinitionKey

public StaticDefinitionKey(java.lang.String legacyName,
                           java.lang.Object parentProcedure,
                           java.lang.Class<?> def)

The contructors copies the parameters to internal data and computed the hash value.

Parameters:

legacyName - The lowercased temp-table legacy name.

parentProcedure - The parent procedure where the temp-table was created.

def - The Java class defining this buffer.

Method Detail

equals

public boolean equals(java.lang.Object o)

Checks whether the alien object is equals to this one.

Overrides:

equals in class java.lang.Object

Parameters:

o - The alien object.

Returns:

true only if the two objects are the same (same temp-table created within the same procedure).

hashCode

public int hashCode()

Obtain the hash code as it was computed in the constructor.

Overrides:

hashCode in class java.lang.Object

Returns:

the hash value for this key.