io.fabric8.forge.camel.maven.EndpointHelper Maven / Gradle / Ivy

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/**
 *  Copyright 2005-2015 Red Hat, Inc.
 *
 *  Red Hat 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
 *
 *  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 io.fabric8.forge.camel.maven;

import java.util.regex.PatternSyntaxException;

public final class EndpointHelper {

    /**
     * Matches the name with the given pattern.
     * 
     * The match rules are applied in this order:
     * 

     * exact match, returns true
     * wildcard match (pattern ends with a * and the name starts with the pattern), returns true
     * regular expression match, returns true
     * otherwise returns false
     * 
     *
     * @param name    the name
     * @param pattern a pattern to match
     * @return true if match, false otherwise.
     */
    public static boolean matchPattern(String name, String pattern) {
        if (name == null || pattern == null) {
            return false;
        }

        if (name.equals(pattern)) {
            // exact match
            return true;
        }

        if (matchWildcard(name, pattern)) {
            return true;
        }

        if (matchRegex(name, pattern)) {
            return true;
        }

        // no match
        return false;
    }

    /**
     * Matches the name with the given pattern.
     * 
     * The match rules are applied in this order:
     * 

     * wildcard match (pattern ends with a * and the name starts with the pattern), returns true
     * otherwise returns false
     * 
     *
     * @param name    the name
     * @param pattern a pattern to match
     * @return true if match, false otherwise.
     */
    private static boolean matchWildcard(String name, String pattern) {
        // we have wildcard support in that hence you can match with: file* to match any file endpoints
        if (pattern.endsWith("*") && name.startsWith(pattern.substring(0, pattern.length() - 1))) {
            return true;
        }
        return false;
    }

    /**
     * Matches the name with the given pattern.
     * 
     * The match rules are applied in this order:
     * 

     * regular expression match, returns true
     * otherwise returns false
     * 
     *
     * @param name    the name
     * @param pattern a pattern to match
     * @return true if match, false otherwise.
     */
    private static boolean matchRegex(String name, String pattern) {
        // match by regular expression
        try {
            if (name.matches(pattern)) {
                return true;
            }
        } catch (PatternSyntaxException e) {
            // ignore
        }
        return false;
    }
}