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/*
 * Copyright (c) 2022 SAP SE or an SAP affiliate company and Eclipse Dirigible contributors
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * SPDX-FileCopyrightText: 2022 SAP SE or an SAP affiliate company and Eclipse Dirigible contributors
 * SPDX-License-Identifier: EPL-2.0
 */
package org.eclipse.dirigible.commons.api.content;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.dirigible.commons.config.Configuration;
import org.slf4j.Logger;

/**
 * The AbstractClasspathContentHandler is the parent of the classes used to locate and enumerate specific resources in
 * the class path.
 */
public abstract class AbstractClasspathContentHandler implements IClasspathContentHandler {

	/** The Constant DIRIGIBLE_SYNCHRONIZER_EXCLUDE_PATHS. */
	private static final String DIRIGIBLE_SYNCHRONIZER_EXCLUDE_PATHS = "DIRIGIBLE_SYNCHRONIZER_EXCLUDE_PATHS";

	/** The Constant EXCLUDE_SEPARATOR. */
	private static final String EXCLUDE_SEPARATOR = ",";

	/** The resources. */
	private final Set resources = Collections.synchronizedSet(new HashSet());
	
	/** The excludes. */
	private static Set EXCLUDES = Collections.synchronizedSet(new HashSet());
	static {
		String pathsToExclude = Configuration.get(DIRIGIBLE_SYNCHRONIZER_EXCLUDE_PATHS);
		if (pathsToExclude != null
				&& !"".equals(pathsToExclude.trim())) {
			String[] paths = pathsToExclude.split(EXCLUDE_SEPARATOR);
			for (String path : paths) {
				EXCLUDES.add(path);
			}
		}
	}

	/**
	 * Accept.
	 *
	 * @param path the path
	 */
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.dirigible.commons.api.content.IClasspathContentHandler#accept(java.lang.String)
	 */
	@Override
	public void accept(String path) {
		if (EXCLUDES.size() > 0) {
			for (String exclude : EXCLUDES) {
				if (path.startsWith(exclude)) {
					getLogger().info("Excluded: " + path);
					return;
				}
			}
		}
		if (isValid(path)) {
			resources.add(path);
			getLogger().info("Added: " + path);
		}
	}

	/**
	 * Gets the paths.
	 *
	 * @return the paths
	 */
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.dirigible.commons.api.content.IClasspathContentHandler#getPaths()
	 */
	@Override
	public Set getPaths() {
		return resources;
	}

	/**
	 * Checks if is valid.
	 *
	 * @param path
	 *            the path
	 * @return true, if is valid
	 */
	protected abstract boolean isValid(String path);

	/**
	 * Gets the logger.
	 *
	 * @return the logger
	 */
	protected abstract Logger getLogger();

}