minor refactorings & performance tweaks

git-svn-id: https://pmd.svn.sourceforge.net/svnroot/pmd/trunk@6345 51baf565-9d33-0410-a72c-fc3788e3496d

pmd/src/net/sourceforge/pmd/dcd/ClassLoaderUtil.java

@@ -107,7 +107,7 @@ public class ClassLoaderUtil {
 		    // Okay
 		}
 	    }
-	    throw new NoSuchMethodException(type.getName() + "." + getMethodSignature(name, parameterTypes));
+	    throw new NoSuchMethodException(type.getName() + '.' + getMethodSignature(name, parameterTypes));
 	}
     }
 
@@ -120,19 +120,16 @@ public class ClassLoaderUtil {
     }
 
     public static String getMethodSignature(String name, Class<?>... parameterTypes) {
-	StringBuilder builder = new StringBuilder();
-	builder.append(name);
+	StringBuilder builder = new StringBuilder(name);
 	if (!(name.equals(CLINIT) || name.equals(INIT))) {
-	    builder.append("(");
-	    if (parameterTypes != null) {
-		for (int i = 0; i < parameterTypes.length; i++) {
-		    if (i > 0) {
-			builder.append(", ");
-		    }
-		    builder.append(parameterTypes[i].getName());
-		}
+	    builder.append('(');
+	    if (parameterTypes != null && parameterTypes.length > 0) {
+	    	builder.append(parameterTypes[0].getName());
+	    	for (int i = 1; i < parameterTypes.length; i++) {
+	    		builder.append(", ").append(parameterTypes[i].getName());
+	    	}
 	    }
-	    builder.append(")");
+	    builder.append(')');
 	}
 	return builder.toString();
     }

pmd/src/net/sourceforge/pmd/dcd/UsageNodeVisitor.java

@@ -3,6 +3,7 @@
  */
 package net.sourceforge.pmd.dcd;
 
+import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 
 import net.sourceforge.pmd.dcd.graph.ClassNode;
@@ -21,7 +22,7 @@ import net.sourceforge.pmd.dcd.graph.UsageGraph;
 public class UsageNodeVisitor extends NodeVisitorAdapter {
 
 	/**
-	 * Configuration options for usage analysus.
+	 * Configuration options for usage analysis.
 	 */
 	public static final class Options {
 		private boolean ignoreClassAnonymous = true;
@@ -178,6 +179,20 @@ public class UsageNodeVisitor extends NodeVisitorAdapter {
 		return super.visit(constructorNode, data);
 	}
 
+	private static boolean isMainMethod(MethodNode node) {
+		
+		final Method method = node.getMember();
+		
+		return method.getName().equals("main")
+			&& Modifier.isPublic(method.getModifiers())
+			&& Modifier.isStatic(method.getModifiers())
+			&& method.getReturnType() == Void.TYPE
+			&& method.getParameterTypes().length == 1
+			&& method.getParameterTypes()[0].isArray()
+			&& method.getParameterTypes()[0].getComponentType().equals(java.lang.String.class);
+	}
+	
+	
 	public Object visit(MethodNode methodNode, Object data) {
 		if (methodNode.getUsers().isEmpty()) {
 			boolean log = true;
@@ -194,14 +209,7 @@ public class UsageNodeVisitor extends NodeVisitorAdapter {
 				}
 			}
 			if (options.isIgnoreMethodMain()) {
-				if (methodNode.getMember().getName().equals("main")
-						&& Modifier.isPublic(methodNode.getMember().getModifiers())
-						&& Modifier.isStatic(methodNode.getMember().getModifiers())
-						&& methodNode.getMember().getReturnType() == Void.TYPE
-						&& methodNode.getMember().getParameterTypes().length == 1
-						&& methodNode.getMember().getParameterTypes()[0].isArray()
-						&& methodNode.getMember().getParameterTypes()[0].getComponentType().equals(
-								java.lang.String.class)) {
+				if (isMainMethod(methodNode)) {
 					ignore("method public static void main(String[])", methodNode);
 					log = false;
 				}