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package org.glassfish.jersey.test.maven.rule;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;
import org.apache.maven.enforcer.rule.api.EnforcerRuleException;
import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper;
import org.apache.maven.plugins.enforcer.AbstractNonCacheableEnforcerRule;
import com.google.common.io.Files;
import com.google.common.io.LineProcessor;
/**
* Maven enforcer rule to enforce that given file does not contain line matching given pattern. When matched, exception is
* raised.
* <p/>
* This is equivalent to shell pseudo-script: {code grep PATTERN FILE && 'raise error'}
*
* @author Stepan Vavra (stepan.vavra at oracle.com)
*/
public class PatternNotMatchedInFileRule extends AbstractNonCacheableEnforcerRule {
/**
* The pattern to look for in the given file.
*/
String pattern;
/**
* The file where to look for lines matching given pattern.
*/
File file;
/**
* Maximum number of lines to be matched (exception is raised regardless of the number of found lines as long as the number is
* greater than 0)
*/
int maxMatchedLines = 0;
public void execute(EnforcerRuleHelper helper)
throws EnforcerRuleException {
if (file == null || !file.exists()) {
return;
}
final Pattern patternCompiled = Pattern.compile(pattern);
try {
final List<String> lines = Files.readLines(file, Charset.defaultCharset(), new LineProcessor<List<String>>() {
private List<String> matchedLines = new LinkedList<>();
@Override
public boolean processLine(final String line) throws IOException {
if (patternCompiled.matcher(line).matches()) {
matchedLines.add(line);
if (maxMatchedLines != 0 && maxMatchedLines <= matchedLines.size()) {
return false;
}
}
return true;
}
@Override
public List<String> getResult() {
return matchedLines;
}
});
if (lines.size() > 0) {
throw new EnforcerRuleException(
"Found lines matching pattern: '" + pattern + "'! Lines matched: " + Arrays.toString(lines.toArray())
+ " in file: " + file.getAbsolutePath());
}
} catch (IOException e) {
throw new EnforcerRuleException("I/O Error occurred during processing of file: " + file.getAbsolutePath(), e);
}
}
}