de.flapdoodle.logparser.matcher.stacktrace.AbstractStackElement.java Source code

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Here is the source code for de.flapdoodle.logparser.matcher.stacktrace.AbstractStackElement.java

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/**
 * Copyright (C) 2013
 *   Michael Mosmann <michael@mosmann.de>
 *
 * with contributions from
 *    ${lic.developers}
 *
 * 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 de.flapdoodle.logparser.matcher.stacktrace;

import java.util.Map;
import java.util.regex.Pattern;

import com.google.common.base.Optional;
import com.google.common.collect.ImmutableMap;

import de.flapdoodle.logparser.regex.Patterns;

public abstract class AbstractStackElement {

    private final String _line;
    private final ImmutableMap<String, String> _attributes;

    protected AbstractStackElement(String line, Map<String, String> attributes) {
        _line = line;
        _attributes = ImmutableMap.copyOf(attributes);
    }

    protected String attribute(String key) {
        return _attributes.get(key);
    }

    public ImmutableMap<String, String> attributes() {
        return _attributes;
    }

    public String line() {
        return _line;
    }

    static interface IStackElementFactory<T> {

        T newInstance(String line, Map<String, String> attributes);
    }

    protected static <T> Optional<T> match(CharSequence input, Pattern pattern, IStackElementFactory<T> factory) {
        Optional<Map<String, String>> m = Patterns.match(pattern.matcher(input));
        if (m.isPresent()) {
            return Optional.of(factory.newInstance(input.toString(), m.get()));
        }
        return Optional.absent();
    }

}