de.jcup.egradle.core.text.JavaImportFinder.java Source code

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Here is the source code for de.jcup.egradle.core.text.JavaImportFinder.java

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/*
 * Copyright 2016 Albert Tregnaghi
 *
 * 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.jcup.egradle.core.text;

import java.util.Set;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;

public class JavaImportFinder {

    private static final Pattern PATTERN = Pattern.compile("\\s*import ([a-zA-Z_]*[a-zA-Z0-9\\\\._]*[\\*]?);");

    public Set<String> findImportedPackages(String text) {
        Set<String> set = new TreeSet<>();
        if (text == null) {
            return set;
        }
        Matcher m = PATTERN.matcher(text);
        while (m.find()) {
            String fullImportName = m.group(1);
            String packageName = StringUtils.substringBeforeLast(fullImportName, ".");
            set.add(packageName);
        }
        return set;
    }
}