Class DelegatingMetaClass

src/main/java/groovy/lang/DelegatingMetaClass.java:30–374

MetaClass implementation that forwards all operations to another meta class.

 * {@link MetaClass} implementation that forwards all operations to another meta class.
 */
public class DelegatingMetaClass implements MetaClass, MutableMetaClass, GroovyObject {
    /**
     * Wrapped meta class that receives delegated operations.
     */
    protected MetaClass delegate;

    /**
     * Creates a delegating meta class for the supplied adaptee.
     *
     * @param delegate the meta class to delegate to
     */
    public DelegatingMetaClass(final MetaClass delegate) {
        this.delegate = delegate;
    }

    /**
     * Creates a delegating meta class for the current meta class of the supplied type.
     *
     * @param theClass the Groovy type whose meta class should be wrapped
     */
    public DelegatingMetaClass(final Class theClass) {
        this(GroovySystem.getMetaClassRegistry().getMetaClass(theClass));
    }

    /** {@inheritDoc} */
    @Override
    public boolean isModified() {
        return this.delegate instanceof MutableMetaClass && ((MutableMetaClass) this.delegate).isModified();
    }

    /** {@inheritDoc} */
    @Override
    public void addNewInstanceMethod(Method method) {
        if (delegate instanceof MutableMetaClass)
            ((MutableMetaClass) delegate).addNewInstanceMethod(method);
    }

    /** {@inheritDoc} */
    @Override
    public void addNewStaticMethod(Method method) {
        if (delegate instanceof MutableMetaClass)
            ((MutableMetaClass) delegate).addNewStaticMethod(method);
    }

    /** {@inheritDoc} */
    @Override
    public void addMetaMethod(MetaMethod metaMethod) {
        if (delegate instanceof MutableMetaClass)
            ((MutableMetaClass) delegate).addMetaMethod(metaMethod);
    }

    /** {@inheritDoc} */
    @Override
    public void addMetaBeanProperty(MetaBeanProperty metaBeanProperty) {
        if (delegate instanceof MutableMetaClass)
            ((MutableMetaClass) delegate).addMetaBeanProperty(metaBeanProperty);
    }