o Added support for java7 isSymlink

Author: krosenvold

pom.xml

@@ -16,7 +16,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
@@ -29,7 +30,9 @@ limitations under the License.
   <version>3.0.8-SNAPSHOT</version>
 
   <name>Plexus Common Utilities</name>
-  <description>A collection of various utility classes to ease working with strings, files, command lines, XML and more.</description>
+  <description>A collection of various utility classes to ease working with strings, files, command lines, XML and
+    more.
+  </description>
   <url>http://plexus.codehaus.org/plexus-utils</url>
 
   <scm>
@@ -66,6 +69,26 @@ limitations under the License.
           </systemProperties>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-enforcer-plugin</artifactId>
+        <version>1.1.1</version>
+        <executions>
+          <execution>
+            <id>enforce-java</id>
+            <goals>
+              <goal>enforce</goal>
+            </goals>
+            <configuration>
+              <rules>
+                <requireJavaVersion>
+                  <version>1.7.0</version>
+                </requireJavaVersion>
+              </rules>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>
 </project>

src/main/java/org/codehaus/plexus/util/DirectoryScanner.java

@@ -722,6 +722,10 @@ public String[] getDeselectedDirectories()
     public boolean isSymbolicLink( File parent, String name )
         throws IOException
     {
+        if ( Java7Detector.isJava7() )
+        {
+            return Java7FileUtil.isSymLink( new File( parent, name ) );
+        }
         File resolvedParent = new File( parent.getCanonicalPath() );
         File toTest = new File( resolvedParent, name );
         return !toTest.getAbsolutePath().equals( toTest.getCanonicalPath() );

src/main/java/org/codehaus/plexus/util/Java7Detector.java

@@ -0,0 +1,48 @@
+package org.codehaus.plexus.util;
+
+/*
+ * Copyright 2011 The Codehaus Foundation.
+ *
+ * Licensed 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.
+ */
+
+/**
+ * Java7 feature detection
+ *
+ * @author Kristian Rosenvold
+ */
+class Java7Detector
+{
+
+    private static final boolean isJava7;
+
+    static
+    {
+        boolean isJava7x = true;
+        try
+        {
+            Class.forName( "java.nio.file.Files" );
+        }
+        catch ( Exception e )
+        {
+            isJava7x = false;
+        }
+        isJava7 = isJava7x;
+    }
+
+
+    public static boolean isJava7()
+    {
+        return isJava7;
+    }
+}

src/main/java/org/codehaus/plexus/util/Java7FileUtil.java

@@ -0,0 +1,32 @@
+package org.codehaus.plexus.util;
+
+/*
+ * Copyright 2007 The Codehaus Foundation.
+ *
+ * Licensed 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.
+ */
+
+import java.io.File;
+import java.nio.file.Files;
+
+/**
+ * Encapsulates use of java7 features
+ */
+public class Java7FileUtil
+{
+    public static boolean isSymLink( File file )
+    {
+        return Files.isSymbolicLink( file.toPath() );
+    }
+
+}