in src/main/java/org/apache/maven/resolver/internal/ant/types/Pom.java [171:187]
public void setCoords(String coords) {
checkAttributesAllowed();
if (file != null) {
throw ambiguousSource();
}
if (groupId != null || artifactId != null || version != null) {
throw ambiguousCoords();
}
Pattern p = Pattern.compile("([^: ]+):([^: ]+):([^: ]+)");
Matcher m = p.matcher(coords);
if (!m.matches()) {
throw new BuildException("Bad POM coordinates, expected format is <groupId>:<artifactId>:<version>");
}
groupId = m.group(1);
artifactId = m.group(2);
version = m.group(3);
}