sk.antons.sb.rest.doclet.finder.ElementFinder Maven / Gradle / Ivy

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/*
 * Copyright 2020 Anton Straka
 *
 * 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 sk.antons.sb.rest.doclet.finder;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.lang.model.element.Element;

/**
 *
 * @author antons
 */
public abstract class ElementFinder {
    private List elements;
    
    public List findIn(Collection collection) {
        elements = new ArrayList<>();
        traverseElements(collection);
        return elements;
    }

    private void traverseElements(Collection collection) {
        if(collection == null) return;
        for(Element element : collection) {
            traverseElement(element);
        }
    }

    private void traverseElement(Element e) {
        if(e == null) return;
        if(filter(e)) elements.add(e);
        traverseElements(e.getEnclosedElements());
    }

    protected abstract boolean filter(Element element);
}