src/main/java/org/apache/maven/plugins/jdeprscan/consumers/JDeprScanConsumer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.maven.plugins.jdeprscan.consumers;

import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.StreamConsumer;

/**
 * Consumes output of jdeprscan tool
 *
 * @author Robert Scholte
 * @since 3.0.0
 */
public class JDeprScanConsumer extends CommandLineUtils.StringStreamConsumer implements StreamConsumer {

    private final Map<String, Set<String>> deprecatedClasses = new HashMap<>();

    private final Map<String, Set<String>> deprecatedMethods = new HashMap<>();

    public static final Pattern DEPRECATED_CLASS = Pattern.compile("^class (\\S+) uses deprecated class (\\S+)");

    public static final Pattern DEPRECATED_METHOD = Pattern.compile("^class (\\S+) uses deprecated method (\\S+)");

    public Map<String, Set<String>> getDeprecatedClasses() {
        return Collections.unmodifiableMap(deprecatedClasses);
    }

    public Map<String, Set<String>> getDeprecatedMethods() {
        return Collections.unmodifiableMap(deprecatedMethods);
    }

    @Override
    public void consumeLine(String line) {
        super.consumeLine(line);

        Matcher deprecatedClassMatcher = DEPRECATED_CLASS.matcher(line);
        matcherCollector(deprecatedClassMatcher, deprecatedClasses);

        Matcher deprecatedMethodMatcher = DEPRECATED_METHOD.matcher(line);
        matcherCollector(deprecatedMethodMatcher, deprecatedMethods);
    }

    private void matcherCollector(Matcher matcher, Map<String, Set<String>> deprecatedMethods) {
        if (!matcher.find()) {
            return;
        }

        Set<String> dm = deprecatedMethods.computeIfAbsent(matcher.group(1), k -> new HashSet<>());
        dm.add(matcher.group(2));
    }
}