org.infinitest.config.InfinitestConfigurationParser.java Source code

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Here is the source code for org.infinitest.config.InfinitestConfigurationParser.java

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/*
 * Infinitest, a Continuous Test Runner.
 *
 * Copyright (C) 2010-2013
 * "Ben Rady" <benrady@gmail.com>,
 * "Rod Coffin" <rfciii@gmail.com>,
 * "Ryan Breidenbach" <ryan.breidenbach@gmail.com>
 * "David Gageot" <david@gageot.net>, et al.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.infinitest.config;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableList;
import com.google.common.io.CharSource;

/**
 * Parses the content of the infinitest.filters file
 * @author sarod
 *
 */
public class InfinitestConfigurationParser {

    private static final String LEGACY_SUFFIX = "\\s?=\\s?(.+)";
    private static final String LEGACY_PREFIX = "^\\s*#+\\s?";

    private static final Splitter ON_COMMA_SPLITTER = Splitter.on(",").omitEmptyStrings().trimResults();

    private interface LineParser {

        /**
         * Process the line if relevant
         * 
         * @param line
         * @return true if the line was successfully parsed and processed by this
         *         parser
         */
        boolean processLineIfRelevant(String line);
    }

    private static class PatternLineParser implements LineParser {

        private final Pattern linePattern;
        private final List<String> listToFillWithMatches;

        private PatternLineParser(Pattern linePattern, List<String> listToFillWithMatches) {
            this.listToFillWithMatches = listToFillWithMatches;
            this.linePattern = linePattern;
        }

        @Override
        public boolean processLineIfRelevant(String line) {
            Matcher excludeMatcher = linePattern.matcher(line);
            if (excludeMatcher.matches()) {
                String lineContent = excludeMatcher.group(1);
                listToFillWithMatches.addAll(ON_COMMA_SPLITTER.splitToList(lineContent));
                return true;
            } else {
                return false;
            }
        }

        @Override
        public String toString() {
            return linePattern.pattern();
        }
    }

    private static class CommentLineParser implements LineParser {

        @Override
        public boolean processLineIfRelevant(String line) {
            return line.startsWith("!") || line.startsWith("#");
        }

    }

    public InfinitestConfiguration parseFileContent(CharSource textConfiguration) throws IOException {

        List<String> excludedPatterns = new ArrayList<String>();
        List<String> includedPatterns = new ArrayList<String>();
        List<String> includedGroups = new ArrayList<String>();
        List<String> excludedGroups = new ArrayList<String>();
        List<String> testngListeners = new ArrayList<String>();

        // Be careful the order of the parsers below is important as the lousy
        // parsers are put at the end
        ImmutableList<LineParser> orderedLineParsers = ImmutableList.<LineParser>builder()
                .add(new PatternLineParser(linePattern("include"), includedPatterns))
                .add(new PatternLineParser(linePattern("exclude"), excludedPatterns))
                .add(new PatternLineParser(linePattern("includeGroups"), includedGroups))
                .add(new PatternLineParser(linePattern("excludeGroups"), excludedGroups))
                .add(new PatternLineParser(linePattern("testngListeners"), testngListeners))

                .add(new PatternLineParser(legacySyntaxLinePattern("groups"), includedGroups))
                .add(new PatternLineParser(legacySyntaxLinePattern("excluded-groups"), excludedGroups))
                .add(new PatternLineParser(legacySyntaxLinePattern("listeners"), testngListeners))

                .add(new CommentLineParser())
                // Catch all remaining lines as legacy excluded patterns
                .add(new PatternLineParser(Pattern.compile("(.*)"), excludedPatterns)).build();

        for (String line : textConfiguration.readLines()) {
            for (LineParser lineParser : orderedLineParsers) {
                if (lineParser.processLineIfRelevant(line)) {
                    break;
                }
            }
        }
        return InfinitestConfiguration.builder().excludedPatterns(excludedPatterns)
                .includedPatterns(includedPatterns).excludedGroups(excludedGroups).includedGroups(includedGroups)
                .testngListeners(testngListeners).build();
    }

    private static Pattern legacySyntaxLinePattern(String key) {
        return Pattern.compile(LEGACY_PREFIX + Pattern.quote(key) + LEGACY_SUFFIX);
    }

    private static final Pattern linePattern(String key) {
        return Pattern.compile(Pattern.quote(key) + "\\s+(.+)");
    }

}