[SHRINKRES-321] Replacing size() == 0/length() == 0 with isEmpty()

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/PackagingType.java

@@ -139,7 +139,7 @@ public static PackagingType of(String typeName) throws IllegalArgumentException
      */
     public static PackagingType fromCache(String typeName) throws IllegalArgumentException {
 
-        if (typeName == null || typeName.length() == 0) {
+        if (typeName == null || typeName.isEmpty()) {
             throw new IllegalArgumentException("Packaging type must not be null nor empty.");
         }
         // return from cache if available

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/ScopeType.java

@@ -60,7 +60,7 @@ public String toString() {
      */
     public static ScopeType fromScopeType(String scopeName) throws IllegalArgumentException {
 
-        if (scopeName == null || scopeName.length() == 0) {
+        if (scopeName == null || scopeName.isEmpty()) {
             if (log.isLoggable(Level.FINEST)) {
                 log.log(Level.FINEST, "Empty scope was replaced with default {0}", COMPILE.value);
             }

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenCoordinateImpl.java

@@ -105,14 +105,14 @@ public final String getVersion() {
     public final String toCanonicalForm() {
 
         final StringBuilder sb = new StringBuilder(super.toCanonicalForm());
-        if (version == null || version.length() == 0) {
+        if (version == null || version.isEmpty()) {
             return sb.toString();
         }
-        if (classifier != null && classifier.length() > 0 && packaging != null) {
+        if (classifier != null && !classifier.isEmpty() && packaging != null) {
             sb.append(SEPARATOR_COORDINATE).append(packaging.getId()).append(SEPARATOR_COORDINATE)
                     .append(classifier).append(SEPARATOR_COORDINATE).append(version);
         }
-        if ((classifier == null || classifier.length() == 0) && packaging != null) {
+        if ((classifier == null || classifier.isEmpty()) && packaging != null) {
             sb.append(SEPARATOR_COORDINATE).append(packaging.getId()).append(SEPARATOR_COORDINATE).append(version);
         }
 

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenCoordinates.java

@@ -49,7 +49,7 @@ private MavenCoordinates() {
      */
     public static MavenCoordinate createCoordinate(final String canonicalForm) throws IllegalArgumentException,
         CoordinateParseException {
-        if (canonicalForm == null || canonicalForm.length() == 0) {
+        if (canonicalForm == null || canonicalForm.isEmpty()) {
             throw new IllegalArgumentException("canonical form is required");
         }
         final MavenCoordinateParser parser = MavenCoordinateParser.parse(canonicalForm);
@@ -71,10 +71,10 @@ public static MavenCoordinate createCoordinate(final String canonicalForm) throw
      */
     public static MavenCoordinate createCoordinate(final String groupId, final String artifactId, final String version,
         final PackagingType packaging, final String classifier) throws IllegalArgumentException {
-        if (groupId == null || groupId.length() == 0) {
+        if (groupId == null || groupId.isEmpty()) {
             throw new IllegalArgumentException("groupId is required");
         }
-        if (artifactId == null || artifactId.length() == 0) {
+        if (artifactId == null || artifactId.isEmpty()) {
             throw new IllegalArgumentException("artifactId is required");
         }
         final MavenCoordinateImpl coordinate = new MavenCoordinateImpl(groupId, artifactId, version, packaging,
@@ -143,12 +143,12 @@ static MavenCoordinateParser parse(final String coordinates) throws CoordinatePa
                     parser.version = position3;
                     break;
                 case 3:
-                    parser.type = (position3 == null || position3.length() == 0) ? PackagingType.JAR
+                    parser.type = (position3 == null || position3.isEmpty()) ? PackagingType.JAR
                         : toPackagingType(position3);
                     parser.version = position4;
                     break;
                 default:
-                    parser.type = (position3 == null || position3.length() == 0) ? PackagingType.JAR
+                    parser.type = (position3 == null || position3.isEmpty()) ? PackagingType.JAR
                         : toPackagingType(position3);
                     parser.classifier = position4;
                     parser.version = position5;

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependencies.java

@@ -70,7 +70,7 @@ private MavenDependencies() {
     public static MavenDependency createDependency(final String canonicalForm, final ScopeType scope,
         final boolean optional, final MavenDependencyExclusion... exclusions) throws IllegalArgumentException,
         CoordinateParseException {
-        if (canonicalForm == null || canonicalForm.length() == 0) {
+        if (canonicalForm == null || canonicalForm.isEmpty()) {
             throw new IllegalArgumentException("canonical form is required");
         }
         final MavenCoordinate delegate = MavenCoordinates.createCoordinate(canonicalForm);
@@ -134,7 +134,7 @@ private static MavenDependency newInstance(final MavenCoordinate coordinate, fin
      */
     public static MavenDependencyExclusion createExclusion(final String canonicalForm) throws IllegalArgumentException,
         CoordinateParseException {
-        if (canonicalForm == null || canonicalForm.length() == 0) {
+        if (canonicalForm == null || canonicalForm.isEmpty()) {
             throw new IllegalArgumentException("canonical form is required");
         }
         final StringTokenizer tokenizer = new StringTokenizer(canonicalForm,
@@ -167,10 +167,10 @@ public static MavenDependencyExclusion createExclusion(final String canonicalFor
      */
     public static MavenDependencyExclusion createExclusion(final String groupId, final String artifactId)
         throws IllegalArgumentException {
-        if (groupId == null || groupId.length() == 0) {
+        if (groupId == null || groupId.isEmpty()) {
             throw new IllegalArgumentException("groupId must be specified");
         }
-        if (artifactId == null || artifactId.length() == 0) {
+        if (artifactId == null || artifactId.isEmpty()) {
             throw new IllegalArgumentException("groupId must be specified");
         }
         final MavenDependencyExclusion exclusion = new MavenDependencyExclusionImpl(groupId, artifactId);

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenGABaseImpl.java

@@ -40,8 +40,8 @@ class MavenGABaseImpl implements MavenGABase {
     MavenGABaseImpl(final String groupId, final String artifactId) {
 
         // Precondition checks
-        assert groupId != null && groupId.length() > 0 : "groupId is required";
-        assert artifactId != null && artifactId.length() > 0 : "artifactId is required";
+        assert groupId != null && !groupId.isEmpty() : "groupId is required";
+        assert artifactId != null && !artifactId.isEmpty() : "artifactId is required";
 
         // Set properties
         this.groupId = groupId;

maven/api-maven/src/main/java/org/jboss/shrinkwrap/resolver/api/maven/filter/RejectDependenciesFilter.java

@@ -76,7 +76,7 @@ public boolean accepts(final MavenDependency dependency, final List<MavenDepende
         }
 
         if (rejectTransitives) {
-            if (dependencyAncestors != null && dependencyAncestors.size() != 0) {
+            if (dependencyAncestors != null && !dependencyAncestors.isEmpty()) {
                 return dependencyAncestors.get(0).equals(dependency);
             }
         }

maven/impl-maven-archive/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/archive/plugins/CompilerPluginConfiguration.java

@@ -97,13 +97,13 @@ public Map<String, String> getAdditionalCompilerArgs() {
         Map<String, String> compilerArgumentsAsMap = new HashMap<String, String>(additionalCompilerArguments.size()
             + additionalCompilerArgs.size() + 1);
 
-        if (additionalCompilerArgument.length() > 0) {
+        if (!additionalCompilerArgument.isEmpty()) {
             compilerArgumentsAsMap.put(additionalCompilerArgument, null);
         }
-        if (additionalCompilerArguments.size() > 0) {
+        if (!additionalCompilerArguments.isEmpty()) {
             compilerArgumentsAsMap.putAll(additionalCompilerArguments);
         }
-        if (additionalCompilerArgs.size() > 0) {
+        if (!additionalCompilerArgs.isEmpty()) {
             for (String value : additionalCompilerArgs) {
                 compilerArgumentsAsMap.put(value, null);
             }

maven/impl-maven-archive/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/archive/plugins/ConfigurationUtils.java

@@ -45,7 +45,7 @@ class ConfigurationUtils {
     static String valueAsString(Map<String, Object> map, Key key, String defaultValue) {
         Validate.notNullOrEmpty(key.key, "Key for plugin configuration must be set");
         if (map.containsKey(key.key)) {
-            return map.get(key.key).toString().length() == 0 ? defaultValue : map.get(key.key).toString();
+            return map.get(key.key).toString().isEmpty() ? defaultValue : map.get(key.key).toString();
         }
         return defaultValue;
     }

maven/impl-maven-archive/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/archive/plugins/MavenArchiveConfiguration.java

@@ -219,7 +219,7 @@ ManifestBuilder loadFile() throws MavenImporterException {
         }
 
         ManifestBuilder addManifestEntries() {
-            if (getManifestEntries().size() > 0) {
+            if (!getManifestEntries().isEmpty()) {
                 for (Map.Entry<String, String> entry : getManifestEntries().entrySet()) {
                     addMainAttribute(entry.getKey(), entry.getValue());
                 }
@@ -228,7 +228,7 @@ ManifestBuilder addManifestEntries() {
         }
 
         ManifestBuilder addManifestSections() {
-            if (getManifestSections().size() > 0) {
+            if (!getManifestSections().isEmpty()) {
                 for (Map.Entry<String, Map<String, String>> entry : getManifestSections().entrySet()) {
                     for (Map.Entry<String, String> attrs : entry.getValue().entrySet()) {
                         addSectionAttribute(entry.getKey(), attrs.getKey(), attrs.getValue());

maven/impl-maven-archive/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/archive/plugins/Validate.java

@@ -65,7 +65,7 @@ public static void stateNotNull(final Object obj, final String message) throws I
      * @throws IllegalArgumentException Thrown if {@code collection} is {@code null} or empty
      */
     public static void notEmpty(final Collection<?> collection, final String message) throws IllegalArgumentException {
-        if (collection == null || collection.size() == 0) {
+        if (collection == null || collection.isEmpty()) {
             throw new IllegalArgumentException(message);
         }
     }
@@ -78,7 +78,7 @@ public static void notEmpty(final Collection<?> collection, final String message
      * @return {@code true} if specified String is null or empty, {@code false} otherwise
      */
     public static boolean isNullOrEmpty(final String string) {
-        return (string == null || string.length() == 0);
+        return (string == null || string.isEmpty());
     }
 
     /**
@@ -89,7 +89,7 @@ public static boolean isNullOrEmpty(final String string) {
      * @return {@code true} if specified String is null or empty, {@code false} otherwise
      */
     public static boolean isNullOrEmptyOrQuestionMark(final String string) {
-        return (string == null || string.length() == 0 || "?".equals(string));
+        return (string == null || string.isEmpty() || "?".equals(string));
     }
 
     /**
@@ -100,7 +100,7 @@ public static boolean isNullOrEmptyOrQuestionMark(final String string) {
      * @throws IllegalArgumentException Thrown if string is null
      */
     public static void notNullOrEmpty(final String string, final String message) throws IllegalArgumentException {
-        if (string == null || string.length() == 0) {
+        if (string == null || string.isEmpty()) {
             throw new IllegalArgumentException(message);
         }
     }

maven/impl-maven/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/MavenArtifactInfoImpl.java

@@ -47,7 +47,7 @@ protected MavenArtifactInfoImpl(final Artifact artifact, final ScopeType scopeTy
                                     final List<DependencyNode> children, boolean optional) {
 
         final PackagingType packaging = PackagingType.of(artifact.getProperty(ArtifactProperties.TYPE, artifact.getExtension()));
-        final String classifier = artifact.getClassifier().length() == 0 ? packaging.getClassifier() : artifact.getClassifier();
+        final String classifier = artifact.getClassifier().isEmpty() ? packaging.getClassifier() : artifact.getClassifier();
 
         this.mavenCoordinate = MavenCoordinates.createCoordinate(artifact.getGroupId(), artifact.getArtifactId(),
             artifact.getBaseVersion(), packaging, classifier);

maven/impl-maven/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/ResolveStageBaseImpl.java

@@ -168,7 +168,7 @@ private RESOLVESTAGETYPE addDependencies(final String... coordinates) throws Coo
             throw new IllegalArgumentException("At least one coordinate must be specified");
         }
         for (final String coordinate : coordinates) {
-            if (coordinate == null || coordinate.length() == 0) {
+            if (coordinate == null || coordinate.isEmpty()) {
                 throw new IllegalArgumentException("null dependency not permitted");
             }
             final MavenDependency dependency = this.resolveDependency(coordinate);
@@ -178,7 +178,7 @@ private RESOLVESTAGETYPE addDependencies(final String... coordinates) throws Coo
     }
 
     private MavenDependency resolveDependency(final String coordinate) {
-        assert coordinate != null && coordinate.length() > 0 : "Coordinate is required";
+        assert coordinate != null && !coordinate.isEmpty() : "Coordinate is required";
         final MavenCoordinate newCoordinate = MavenCoordinates.createCoordinate(coordinate);
         final MavenDependency declared = MavenDependencies.createDependency(newCoordinate, null, false);
         final MavenDependency resolved = this.resolveDependency(declared);

maven/impl-maven/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/bootstrap/MavenSettingsBuilder.java

@@ -204,11 +204,11 @@ private SettingsBuildingRequest getDefaultSettingsBuildingRequest() {
         request.setGlobalSettingsFile(new File(DEFAULT_GLOBAL_SETTINGS_PATH));
         request.setUserSettingsFile(new File(DEFAULT_USER_SETTINGS_PATH));
         // set alternate files
-        if (altUserSettings != null && altUserSettings.length() > 0) {
+        if (altUserSettings != null && !altUserSettings.isEmpty()) {
             request.setUserSettingsFile(new File(altUserSettings));
         }
 
-        if (altGlobalSettings != null && altGlobalSettings.length() > 0) {
+        if (altGlobalSettings != null && !altGlobalSettings.isEmpty()) {
             request.setGlobalSettingsFile(new File(altGlobalSettings));
         }
 
@@ -221,15 +221,15 @@ private Settings decryptPasswords(Settings settings) {
         String altSecuritySettings = SecurityActions.getProperty(ALT_SECURITY_SETTINGS_XML_LOCATION);
 
         // set alternate file
-        if (altSecuritySettings != null && altSecuritySettings.length() > 0) {
+        if (altSecuritySettings != null && !altSecuritySettings.isEmpty()) {
             securitySettings = new File(altSecuritySettings);
         }
 
         SettingsDecrypter decrypter = new MavenSettingsDecrypter(securitySettings);
         SettingsDecryptionRequest request = new DefaultSettingsDecryptionRequest(settings);
         SettingsDecryptionResult result = decrypter.decrypt(request);
 
-        if (result.getProblems().size() > 0) {
+        if (!result.getProblems().isEmpty()) {
             StringBuilder sb = new StringBuilder("Found ").append(result.getProblems().size())
                     .append(" problems while trying to decrypt settings configuration.");
 
@@ -251,13 +251,13 @@ private Settings decryptPasswords(Settings settings) {
     private Settings enrichWithLocalRepository(Settings settings) {
 
         // set default value if not set at all
-        if (settings.getLocalRepository() == null || settings.getLocalRepository().length() == 0) {
+        if (settings.getLocalRepository() == null || settings.getLocalRepository().isEmpty()) {
             settings.setLocalRepository(DEFAULT_REPOSITORY_PATH);
         }
 
         // override any value with system property based location
         String altLocalRepository = SecurityActions.getProperty(ALT_LOCAL_REPOSITORY_LOCATION);
-        if (altLocalRepository != null && altLocalRepository.length() > 0) {
+        if (altLocalRepository != null && !altLocalRepository.isEmpty()) {
             settings.setLocalRepository(altLocalRepository);
         }
         return settings;
@@ -267,7 +267,7 @@ private Settings enrichWithLocalRepository(Settings settings) {
     private Settings enrichWithOfflineMode(Settings settings) {
 
         String goOffline = SecurityActions.getProperty(ALT_MAVEN_OFFLINE);
-        if (goOffline != null && goOffline.length() > 0) {
+        if (goOffline != null && !goOffline.isEmpty()) {
             settings.setOffline(Boolean.valueOf(goOffline));
         }
 

maven/impl-maven/src/main/java/org/jboss/shrinkwrap/resolver/impl/maven/convert/MavenConverter.java

@@ -104,10 +104,10 @@ public static String toCanonicalForm(final Artifact artifact) {
 
         final PackagingType packaging = PackagingType
                 .of(artifact.getProperty(ArtifactProperties.TYPE, artifact.getExtension()));
-        final String classifier = artifact.getClassifier().length() == 0 ? packaging.getClassifier() : artifact.getClassifier();
+        final String classifier = artifact.getClassifier().isEmpty() ? packaging.getClassifier() : artifact.getClassifier();
 
         sb.append(packaging.getId()).append(":");
-        if (classifier.length() != 0) {
+        if (!classifier.isEmpty()) {
             sb.append(classifier).append(":");
         }
         sb.append(artifact.getVersion());
@@ -120,7 +120,7 @@ public static MavenDependency fromDependency(final Dependency dependency) {
 
         final PackagingType packaging = PackagingType
                 .of(artifact.getProperty(ArtifactProperties.TYPE, artifact.getExtension()));
-        final String classifier = artifact.getClassifier().length() == 0 ? packaging.getClassifier() : artifact.getClassifier();
+        final String classifier = artifact.getClassifier().isEmpty() ? packaging.getClassifier() : artifact.getClassifier();
 
         final MavenCoordinate coordinate = MavenCoordinates.createCoordinate(artifact.getGroupId(),
                 artifact.getArtifactId(), artifact.getVersion(), packaging, classifier);
@@ -166,7 +166,7 @@ public static MavenDependency fromDependency(org.apache.maven.model.Dependency d
             stereotype = new DefaultArtifactType(dependency.getType());
         }
 
-        boolean system = dependency.getSystemPath() != null && dependency.getSystemPath().length() > 0;
+        boolean system = dependency.getSystemPath() != null && !dependency.getSystemPath().isEmpty();
 
         Map<String, String> props = null;
         if (system) {
@@ -183,7 +183,7 @@ public static MavenDependency fromDependency(org.apache.maven.model.Dependency d
 
         final PackagingType packaging = PackagingType
                 .of(artifact.getProperty(ArtifactProperties.TYPE, artifact.getExtension()));
-        final String classifier = artifact.getClassifier().length() == 0 ? packaging.getClassifier() : artifact.getClassifier();
+        final String classifier = artifact.getClassifier().isEmpty() ? packaging.getClassifier() : artifact.getClassifier();
 
         final MavenCoordinate coordinate = MavenCoordinates.createCoordinate(artifact.getGroupId(),
                 artifact.getArtifactId(), artifact.getVersion(), packaging, classifier);
@@ -264,8 +264,8 @@ public static Exclusion asExclusion(MavenDependencyExclusion coordinates) {
         String group = coordinates.getGroupId();
         String artifact = coordinates.getArtifactId();
 
-        group = (group == null || group.length() == 0) ? "*" : group;
-        artifact = (artifact == null || artifact.length() == 0) ? "*" : artifact;
+        group = (group == null || group.isEmpty()) ? "*" : group;
+        artifact = (artifact == null || artifact.isEmpty()) ? "*" : artifact;
 
         return new Exclusion(group, artifact, "*", "*");
     }