Adds liked-license/whitelist approach. Fixes #5.

src/main/java/org/linuxstuff/mojo/licensing/AbstractLicensingMojo.java

@@ -252,7 +252,8 @@ private LicensingRequirements mergeLicenseRequirements(List<LicensingRequirement
 	 */
 	protected boolean isDisliked(MavenProject mavenProject) {
 
-		if (!licensingRequirements.containsDislikedLicenses()) {
+		if (!licensingRequirements.containsDislikedLicenses()
+				&& !licensingRequirements.containsLikedLicenses()) {
 			return false;
 		}
 
@@ -262,6 +263,14 @@ protected boolean isDisliked(MavenProject mavenProject) {
 
 		Set<String> licenses = collectLicensesForMavenProject(mavenProject);
 
+		if (licensingRequirements.containsLikedLicenses()) {
+			for (String license : licenses) {
+
+				if (licensingRequirements.isLikedLicense(license))
+					return false;
+			}
+			return true;
+		}
 		for (String license : licenses) {
 
 			if (!licensingRequirements.isDislikedLicense(license))

src/main/java/org/linuxstuff/mojo/licensing/CheckMojo.java

@@ -41,6 +41,14 @@ public class CheckMojo extends AbstractLicensingMojo {
 	 */
 	protected boolean failIfDisliked;
 
+	/**
+	 * If using liked licenses, only use those in the report.
+	 * 
+	 * @parameter expression="${includeOnlyLikedInReport}" default-value="true"
+	 * @since 1.0
+	 */
+	protected boolean includeOnlyLikedInReport;
+
 	/**
 	 * Fail the build if any dependencies are either under disliked licenses or
 	 * are missing licensing information.
@@ -84,7 +92,14 @@ protected LicensingReport generateReport(MavenProject project) {
 				aReport.addMissingLicense(entry);
 			} else {
 				for (String license : licenses) {
-					entry.addLicense(license);
+					if (includeOnlyLikedInReport && licensingRequirements.containsLikedLicenses()) {
+						if (licensingRequirements.isLikedLicense( license )) {
+							entry.addLicense(license);
+						}
+					}
+					else {
+						entry.addLicense(license);
+					}
 				}
 
 				if (isDisliked(mavenProject)) {

src/main/java/org/linuxstuff/mojo/licensing/model/LicensingRequirements.java

@@ -19,6 +19,10 @@ public class LicensingRequirements {
 	@XStreamImplicit(itemFieldName = "disliked-license")
 	private Set<String> dislikedLicenses = new HashSet<String>();
 
+	@XStreamAlias("liked-licenses")
+	@XStreamImplicit(itemFieldName = "liked-license")
+	private Set<String> likedLicenses = new HashSet<String>();
+
 	@XStreamAlias("dislike-exemptions")
 	@XStreamImplicit(itemFieldName = "dislike-exemption")
 	private Set<String> dislikeExemptions = new HashSet<String>();
@@ -35,6 +39,10 @@ public void addDislikedLicense(String licenseName) {
 		dislikedLicenses.add(licenseName);
 	}
 
+	public void addLikedLicense(String licenseName) {
+		likedLicenses.add(licenseName);
+	}
+
 	public void addDislikeExemption(String artifactId) {
 		dislikeExemptions.add(artifactId);
 	}
@@ -43,6 +51,10 @@ public boolean isDislikedLicense(String license) {
 		return dislikedLicenses.contains(license);
 	}
 
+	public boolean isLikedLicense(String license) {
+		return likedLicenses.contains(license);
+	}
+
 	public String getCorrectLicenseName(String name) {
 		for (CoalescedLicense coalesced : coalescedLicenses) {
 			if (coalesced.getFinalName().equalsIgnoreCase(name.trim()))
@@ -79,6 +91,10 @@ public boolean containsDislikedLicenses() {
 		return !dislikedLicenses.isEmpty();
 	}
 
+	public boolean containsLikedLicenses() {
+		return !likedLicenses.isEmpty();
+	}
+
 	public Set<ArtifactWithLicenses> getMissingLicenses() {
 		return missingLicenses;
 	}
@@ -91,6 +107,10 @@ public Set<String> getDislikedLicenses() {
 		return dislikedLicenses;
 	}
 
+	public Set<String> getLikedLicenses() {
+		return likedLicenses;
+	}
+
 	public Set<String> getDislikeExemptions() {
 		return dislikeExemptions;
 	}
@@ -103,6 +123,12 @@ public void combineWith(LicensingRequirements req) {
 			}
 		}
 
+		if (req.getLikedLicenses() != null) {
+			for (String source : req.getLikedLicenses()) {
+				addLikedLicense(source);
+			}
+		}
+
 		if (req.getDislikeExemptions() != null) {
 			for (String source : req.getDislikeExemptions()) {
 				addDislikeExemption(source);