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/*
* Fabric3
* Copyright (c) 2009-2011 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see .
*/
package org.fabric3.spi.introspection.validation;
import java.io.ByteArrayOutputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import org.fabric3.host.contribution.ArtifactValidationFailure;
import org.fabric3.host.contribution.ValidationFailure;
/**
* Utility methods for outputting validation errors.
*
* @version $Rev: 9763 $ $Date: 2011-01-03 00:48:06 +0000 (Mon, 03 Jan 2011) $
*/
public final class ValidationUtils {
private static ValidationExceptionComparator COMPARATOR = new ValidationExceptionComparator();
private static enum TYPE {
WARNING,
ERROR
}
private ValidationUtils() {
}
/**
* Sorts and writes the list of error messages to a string.
*
* @param failures the collection of failures to write
* @return the string containing the validation messages
*/
public static String outputErrors(List failures) {
return output(failures, TYPE.ERROR);
}
/**
* Sorts and writes the list of warning messages to a string.
*
* @param failures the collection of failures to write
* @return the string containing the validation messages
*/
public static String outputWarnings(List failures) {
return output(failures, TYPE.WARNING);
}
/**
* Sorts and writes the list of errors to the given writer.
*
* @param writer the writer
* @param failures the collection of failures to write
*/
public static void writeErrors(PrintWriter writer, List failures) {
write(writer, failures, TYPE.ERROR);
}
/**
* Sorts and writes the list of warnings to the given writer.
*
* @param writer the writer
* @param failures the collection of failures to write
*/
public static void writeWarnings(PrintWriter writer, List failures) {
write(writer, failures, TYPE.WARNING);
}
private static String output(List failures, TYPE type) {
ByteArrayOutputStream bas = new ByteArrayOutputStream();
PrintWriter writer = new PrintWriter(bas);
write(writer, failures, type);
return bas.toString();
}
private static void write(PrintWriter writer, List failures, TYPE type) {
int count = 0;
List sorted = new ArrayList(failures);
// sort the errors so that ArtifactValidationFailures are evaluated last. This is done so that nested failures are printed after all
// failures in the parent artifact.
Collections.sort(sorted, COMPARATOR);
// if a composite is used multiple times, only report errors contained in it once
HashSet reported = new HashSet();
for (ValidationFailure failure : sorted) {
count = writerError(failure, writer, count, type, reported);
}
if (count == 1) {
if (type == TYPE.ERROR) {
writer.write("1 error was found \n\n");
} else {
writer.write("1 warning was found \n\n");
}
} else {
if (type == TYPE.ERROR) {
writer.write(count + " errors were found \n\n");
} else {
if (count != 0) {
writer.write(count + " warnings were found \n\n");
}
}
}
writer.flush();
}
private static int writerError(ValidationFailure failure, PrintWriter writer, int count, TYPE type, HashSet reported) {
if (failure instanceof ArtifactValidationFailure) {
ArtifactValidationFailure artifactFailure = (ArtifactValidationFailure) failure;
if (reported.contains(artifactFailure.getArtifactName())) {
// if the error has already been reported because the artifact is used multiple times, don't print it again
return count;
}
if (!errorsOnlyInContainedArtifacts(artifactFailure)) {
if (type == TYPE.ERROR) {
writer.write("Errors in " + artifactFailure.getArtifactName() + " (" + artifactFailure.getContributionUri() + ")\n\n");
} else {
writer.write("Warnings in " + artifactFailure.getArtifactName() + " (" + artifactFailure.getContributionUri() + ")\n\n");
}
}
for (ValidationFailure childFailure : artifactFailure.getFailures()) {
count = writerError(childFailure, writer, count, type, reported);
}
reported.add(artifactFailure.getArtifactName());
} else {
if (type == TYPE.ERROR) {
writer.write(" ERROR: " + failure.getMessage() + "\n\n");
} else {
writer.write(" WARNING: " + failure.getMessage() + "\n\n");
}
++count;
}
return count;
}
private static boolean errorsOnlyInContainedArtifacts(ArtifactValidationFailure artifactFailure) {
for (ValidationFailure failure : artifactFailure.getFailures()) {
if (!(failure instanceof ArtifactValidationFailure)) {
return false;
}
}
return true;
}
}
