TypeFilteringNotationConverter.java

/*
 * Copyright 2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gradle.internal.typeconversion;

import org.gradle.internal.exceptions.DiagnosticsVisitor;

class TypeFilteringNotationConverter<N, S, T> implements NotationConverter<N, T> {
    private final Class<S> type;
    private final NotationConverter<? super S, ? extends T> delegate;

    public TypeFilteringNotationConverter(Class<S> type, NotationConverter<? super S, ? extends T> delegate) {
        this.type = type;
        this.delegate = delegate;
    }

    public void convert(N notation, NotationConvertResult<? super T> result) throws TypeConversionException {
        if (type.isInstance(notation)) {
            delegate.convert(type.cast(notation), result);
        }
    }

    @Override
    public void describe(DiagnosticsVisitor visitor) {
        delegate.describe(visitor);
    }
}