src/main/java/org/apache/sling/scripting/sightly/impl/compiler/optimization/SequenceStreamTransformer.java

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 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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 * Unless required by applicable law or agreed to in writing,
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package org.apache.sling.scripting.sightly.impl.compiler.optimization;

import java.util.ArrayList;
import java.util.List;

import org.apache.sling.scripting.sightly.compiler.commands.CommandStream;

/**
 * Applies a list of transformations in sequence.
 */
public class SequenceStreamTransformer implements StreamTransformer {

    private List<StreamTransformer> transformers;

    public SequenceStreamTransformer(List<StreamTransformer> transformers) {
        this.transformers = new ArrayList<>(transformers);
    }

    @Override
    public CommandStream transform(CommandStream inStream) {
        CommandStream stream = inStream;
        for (StreamTransformer transformer : transformers) {
            stream = transformer.transform(stream);
        }
        return stream;
    }
}