File Doc Category Size Date Package
MutabilityControl.java API Doc Android 1.5 API 2517 Wed May 06 22:41:02 BST 2009 com.android.dx.util

MutabilityControl

java.lang.Object

public class MutabilityControl extends Object

Very simple base class that implements a flag to control the mutability of instances. This class just provides the flag and a utility to check and throw the right exception, but it is up to subclasses to place calls to the checker in all the right places.

Fields Summary
private boolean
mutable
whether this instance is mutable
Constructors Summary
public MutabilityControl()
Constructs an instance. It is initially mutable.
mutable = true;
public MutabilityControl(boolean mutable)
Constructs an instance, explicitly indicating the mutability.
param
mutable true iff this instance is mutable
this.mutable = mutable;
Methods Summary
public final boolean isImmutable()
Checks to see whether or not this instance is immutable. This is the same as calling !isMutable().
return
true iff this instance is immutable
return !mutable;
public final boolean isMutable()
Checks to see whether or not this instance is mutable.
return
true iff this instance is mutable
return mutable;
public void setImmutable()
Makes this instance immutable.
mutable = false;
public final void throwIfImmutable()
Throws {@link MutabilityException} if this instance is immutable.
if (!mutable) { throw new MutabilityException("immutable instance"); }
public final void throwIfMutable()
Throws {@link MutabilityException} if this instance is mutable.
if (mutable) { throw new MutabilityException("mutable instance"); }