org.apache.torque.generator.variable

## Class VariableStore

- java.lang.Object
- - org.apache.torque.generator.variable.VariableStore

-     public class VariableStore
      extends Object

  Stores all variables which are currently accessible.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `VariableStore()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `clear()` Removes all variables from this store.
    `void` | `endFile()` Signals this store that the processing of one file has ended.
    `void` | `endGeneration()` Signals this store that generation has ended.
    `void` | `endOutlet()` Signals this store that the processing of a outlet has ended.
    `QualifiedNameMap<Variable>` | `getContent()` Returns a map with the variables contained in this store.
    `Variable` | `getInHierarchy(QualifiedName key)` Returns the most specific variable which is visible from the key's namespace and has the same name as the key's name.
    `void` | `remove(Variable variable)` removes a variable from the store.
    `void` | `set(Variable variable)` Sets a variable.
    `void` | `startOutlet()` Signals this store that the processing of a outlet has started.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### VariableStore

          public VariableStore()

  - ### Method Detail

    - #### set

          public void set(Variable variable)

      Sets a variable.
      Parameters:
        `variable` - the variable to set.
      Throws:
        `NullPointerException` - if variable is null.

    - #### remove

          public void remove(Variable variable)

      removes a variable from the store.
      Parameters:
        `variable` - the variable to remove, not null.
      Throws:
        `NullPointerException` - if variable is null.

    - #### startOutlet

          public void startOutlet()

      Signals this store that the processing of a outlet has started.

    - #### endOutlet

          public void endOutlet()

      Signals this store that the processing of a outlet has ended. Removes all variables with the scope `Variable.Scope.OUTLET`, and all variables with the scope `Variable.Scope.CHILDREN` which were set by the outlet which processing ended.

    - #### endFile

          public void endFile()

      Signals this store that the processing of one file has ended. Removes all variables with the scope `FILE`.

    - #### endGeneration

          public void endGeneration()

      Signals this store that generation has ended. Removes the variables from all scopes.

    - #### clear

          public void clear()

      Removes all variables from this store.

    - #### getContent

          public QualifiedNameMap<Variable> getContent()

      Returns a map with the variables contained in this store. Note that if one variable is hidden by another with a more specific scope, only the variable with the more specific scope is returned.

      The Map is not backed by this stores, i.e. adding and removing variables to the returned nmap has no effect on this store. However, the variables in the returned map are the variables in this store, i.e. setting the value of the variable will change the variable in this store.

      Note: The current store content is rebuilt each time this method is called. For this reason, `store.getInHierarchy(qualifiedName)` is much faster than `store.getContent().get(qualifiedName)`.

      Returns:
        a map with the variables contained ins this store, never null.

    - #### getInHierarchy

          public Variable getInHierarchy(QualifiedName key)

      Returns the most specific variable which is visible from the key's namespace and has the same name as the key's name. if several most specific variables are found in the different scopes, the one with the most specific scope is returned.
      Parameters:
        `key` - The key for the variable.
      Returns:
        the most specific matching variable, or null if no variable matches.

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