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/*
* 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.ivy.plugins.conflict;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.ivy.core.resolve.IvyNode;
import org.apache.ivy.util.Message;
/**
* A ConflictManager that can be used to resolve conflicts based on regular expressions of the
* revision of the module. The conflict manager is added like this:
*
* <pre>
* <!-- Match all revisions, but ignore the last dot(.) and the character after it.
* Used to match api changes in out milestones. -->
* <conflict-managers>
* <regexp-cm name="regexp"
* regexp="(.*)\..$" ignoreNonMatching="true"/>
* </conflict-managers>
* </pre>
*
* The regular expression must contain a capturing group. The group will be used to resolve the
* conflicts by an String.equals() test. If ignoreNonMatching is false non matching modules will
* result in an exception. If it is true they will be compaired by their full revision.
*/
public class RegexpConflictManager extends AbstractConflictManager {
private Pattern pattern = Pattern.compile("(.*)");
private boolean mIgnoreNonMatching;
public RegexpConflictManager() {
}
public void setRegexp(String regexp) {
pattern = Pattern.compile(regexp);
Matcher matcher = pattern.matcher("abcdef");
if (matcher.groupCount() != 1) {
String message = "Pattern does not contain ONE (capturing group): '" + pattern + "'";
Message.error(message);
throw new IllegalArgumentException(message);
}
}
public void setIgnoreNonMatching(boolean ignoreNonMatching) {
mIgnoreNonMatching = ignoreNonMatching;
}
public Collection resolveConflicts(IvyNode parent, Collection conflicts) {
IvyNode lastNode = null;
for (Iterator iter = conflicts.iterator(); iter.hasNext();) {
IvyNode node = (IvyNode) iter.next();
if (lastNode != null && !matchEquals(node, lastNode)) {
String msg = lastNode + ":" + getMatch(lastNode) + " (needed by "
+ Arrays.asList(lastNode.getAllRealCallers()) + ") conflicts with " + node
+ ":" + getMatch(node) + " (needed by "
+ Arrays.asList(node.getAllRealCallers()) + ")";
throw new StrictConflictException(msg);
}
if (lastNode == null || nodeIsGreater(node, lastNode)) {
lastNode = node;
}
}
return Collections.singleton(lastNode);
}
private boolean nodeIsGreater(IvyNode node, IvyNode lastNode) {
return getMatch(node).compareTo(getMatch(lastNode)) > 0;
}
private boolean matchEquals(IvyNode lastNode, IvyNode node) {
return getMatch(lastNode).equals(getMatch(node));
}
private String getMatch(IvyNode node) {
String revision = node.getId().getRevision();
Matcher matcher = pattern.matcher(revision);
if (matcher.matches()) {
String match = matcher.group(1);
if (match != null) {
return match;
}
warnOrThrow("First group of pattern: '" + pattern + "' does not match: " + revision
+ " " + node);
} else {
warnOrThrow("Pattern: '" + pattern + "' does not match: " + revision + " " + node);
}
return revision;
}
private void warnOrThrow(String message) {
if (mIgnoreNonMatching) {
Message.warn(message);
} else {
throw new StrictConflictException(message);
}
}
}
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