com.betfair.tornjak.monitor.overlay.RegExpMatcher.java Source code

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Here is the source code for com.betfair.tornjak.monitor.overlay.RegExpMatcher.java

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/*
 * Copyright 2013, The Sporting Exchange Limited
 *
 * 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 com.betfair.tornjak.monitor.overlay;

import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

/**
 * Uses regular expressions to match an mbean name and attribute.
 * 
 * @author vanbrakelb, kiersztynw
 * 
 */
public class RegExpMatcher implements MBeanAttributeMatcher {

    private final Pattern domainPattern;
    private final Pattern keyPropertyListPattern;
    private final Pattern attributePattern;

    public RegExpMatcher(String domainRexEx, String keyPropertyListRexEx, String attributeRegEx) {
        domainPattern = createPattern(domainRexEx);
        keyPropertyListPattern = createPattern(keyPropertyListRexEx);
        attributePattern = createPattern(attributeRegEx);
    }

    private Pattern createPattern(String regEx) {
        if (StringUtils.isNotBlank(regEx)) {
            return Pattern.compile(regEx, Pattern.CASE_INSENSITIVE);
        }

        return null;
    }

    @Override
    public boolean match(String domain, String keyProperty, String attribute) {
        return match(domainPattern, domain) && match(keyPropertyListPattern, keyProperty)
                && match(attributePattern, attribute);
    }

    private boolean match(Pattern pattern, String str) {
        if (pattern == null) {
            return true;
        }
        return pattern.matcher(str).matches();
    }
}