misc cleanup

git-svn-id: https://pmd.svn.sourceforge.net/svnroot/pmd/trunk@7343 51baf565-9d33-0410-a72c-fc3788e3496d

pmd/src/net/sourceforge/pmd/renderers/SummaryHTMLRenderer.java

@@ -48,22 +48,22 @@ public class SummaryHTMLRenderer extends AbstractAccumulatingRenderer {
      * @throws IOException
      */
     public void renderSummary() throws IOException {
-	StringBuffer buf = new StringBuffer(500);
-	buf.append("<h2><center>Summary</h2></center>");
-	buf.append("<table align=\"center\" cellspacing=\"0\" cellpadding=\"3\">");
-	buf.append("<th>Rule name</th>");
-	buf.append("<th>Number of violations</th>");
-	writer.write(buf.toString());
-	Map<String, Integer> summary = report.getSummary();
-	for (Map.Entry<String, Integer> entry : summary.entrySet()) {
-	    String ruleName = entry.getKey();
-	    buf.setLength(0);
-	    buf.append("<tr>");
-	    buf.append("<td>" + ruleName + "</td>");
-	    buf.append("<td align=center>" + entry.getValue().intValue() + "</td>");
-	    buf.append("</tr>");
-	    writer.write(buf.toString());
-	}
-	writer.write("</table>");
+    	StringBuilder buf = new StringBuilder(500);
+		buf.append("<h2><center>Summary</h2></center>");
+		buf.append("<table align=\"center\" cellspacing=\"0\" cellpadding=\"3\">");
+		buf.append("<th>Rule name</th>");
+		buf.append("<th>Number of violations</th>");
+		writer.write(buf.toString());
+		Map<String, Integer> summary = report.getSummary();
+		for (Map.Entry<String, Integer> entry : summary.entrySet()) {
+		    String ruleName = entry.getKey();
+		    buf.setLength(0);
+		    buf.append("<tr>");
+		    buf.append("<td>" + ruleName + "</td>");
+		    buf.append("<td align=center>" + entry.getValue().intValue() + "</td>");
+		    buf.append("</tr>");
+		    writer.write(buf.toString());
+		}
+		writer.write("</table>");
     }
 }

pmd/src/net/sourceforge/pmd/util/Benchmark.java

@@ -147,12 +147,13 @@ public class Benchmark {
             p.getConfiguration().setDefaultLanguageVersion(languageVersion);
             RuleContext ctx = new RuleContext();
             long start = System.currentTimeMillis();
+            Reader reader = null;
             for (DataSource dataSource: dataSources) {
-                Reader reader = new InputStreamReader(dataSource.getInputStream());
-                ctx.setSourceCodeFilename(dataSource.getNiceFileName(false, null));
-                p.processFile(reader, ruleSets, ctx);
-                reader.close();
-            }
+            	reader = new InputStreamReader(dataSource.getInputStream());
+            	ctx.setSourceCodeFilename(dataSource.getNiceFileName(false, null));
+            	p.processFile(reader, ruleSets, ctx);
+            	IOUtil.closeQuietly(reader);
+            	}
             long end = System.currentTimeMillis();
             long elapsed = end - start;
             results.add(new Result(elapsed, rule));

pmd/src/net/sourceforge/pmd/util/ClasspathClassLoader.java

@@ -65,15 +65,8 @@ public class ClasspathClassLoader extends URLClassLoader {
                     urls.add(createURLFromPath(line));
                 }
             }
-            in.close();
         } finally {
-            if (in != null) {
-                try {
-                    in.close();
-                } catch (IOException e) {
-                    LOG.log(Level.SEVERE, "IOException while closing InputStream", e);
-                }
-            }
+        	IOUtil.closeQuietly(in);
         }
     }
 
@@ -87,17 +80,9 @@ public class ClasspathClassLoader extends URLClassLoader {
      */
     @Override
     public String toString() {
-        StringBuilder sb = new StringBuilder();
-        sb.append(getClass().getSimpleName());
+        StringBuilder sb = new StringBuilder(getClass().getSimpleName());
         sb.append("[[");
-        boolean first = true;
-        for (URL url : getURLs()) {
-            if (!first) {
-                sb.append(':');
-            }
-            first = false;
-            sb.append(url);
-        }
+        StringUtil.asStringOn(sb, getURLs(), ":");       
         sb.append("] parent: ");
         sb.append(getParent());
         sb.append(']');

pmd/src/net/sourceforge/pmd/util/StringUtil.java

@@ -304,6 +304,27 @@ public final class StringUtil {
 	        sb.append(iter.next());
 	    }
 	}
+	
+	/**
+	 * Copies the array items onto the string builder each delimited by the separator.
+	 * Does nothing if the array is null or empty.
+	 *
+	 * @param sb StringBuilder
+	 * @param items Object[]
+	 * @param separator String
+	 */
+	public static void asStringOn(StringBuilder sb, Object[] items, String separator) {
+
+	    if (items == null | items.length == 0) { return;  }
+
+	    sb.append(items[0]);
+
+	    for (int i=1; i<items.length; i++) {
+	    	sb.append(separator);
+	        sb.append(items[i]);
+	    }
+	}
+	
 	/**
 	 * Return the length of the shortest string in the array.
 	 * If the collection is empty or any one of them is