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 * version 2 for more details (a copy is included in the LICENSE file that
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package org.graalvm.compiler.options;

An option that always returns the same value.
/** * An option that always returns the same {@linkplain #getValue() value}. */
public class StableOptionValue<T> extends OptionValue<T> {
Creates a stable option value.
/** * Creates a stable option value. */
public StableOptionValue(T value) { super(value); }
Used to assert the invariant for stability. Without using locks, this check is not safe against races and so it's only an assertion.
/** * Used to assert the invariant for stability. Without using locks, this check is not safe * against races and so it's only an assertion. */
private boolean getValueCalled;
Creates an uninitialized stable option value for a subclass that initializes itself lazily.
/** * Creates an uninitialized stable option value for a subclass that initializes itself * {@link #defaultValue() lazily}. */
public StableOptionValue() { }
Gets the value of this option.
/** * Gets the value of this option. */
@Override public final T getValue() { T result = super.getValue(); assert initGetValueCalled(); return result; } private boolean initGetValueCalled() { getValueCalled = true; return true; }
{@inheritDoc}

This must only be called if getValue() has never been called.

/** * {@inheritDoc} * <p> * This must only be called if {@link #getValue()} has never been called. */
@Override public final void setValue(Object v) { assert !getValueCalled; super.setValue(v); } }