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## org.apache.tapestry5.internal.plastic
Class Lockable

    java.lang.Object
      org.apache.tapestry5.internal.plastic.Lockable

Direct Known Subclasses:
  InstructionBuilderImpl, PlasticClassImpl, PlasticManager.PlasticManagerBuilder, SwitchBlockImpl, TryCatchBlockImpl

    public class Lockable

extends java.lang.Object

An object that can be locked, at which point most of its functionality is disabled. This conforms to general builder approach used throughout Plastic where objects have an active construction phase, but are then locked (to encourage user code to discard them after they are no longer of any use).

Constructor Summary
`Lockable()`

Method Summary
`protected void` | `check()` Checks to see if the object has been locked.
`protected void` | `lock()` Invokes `check()`, then sets the locked flag.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Lockable

    public Lockable()

Method Detail

### check

    protected void check()

  Checks to see if the object has been locked.

  Throws:
    `java.lang.IllegalStateException` - if `lock()` has been invoked.

### lock

    protected void lock()

  Invokes `check()`, then sets the locked flag. Subsequent calls to `check()` will fail.

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