'while' loop replaceable with enhanced 'for' loop

Reports while loops which iterate over collections, and can be replaced with an enhanced for loop (i.e. foreach iteration syntax).

Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>

ajde.core/src/main/java/org/aspectj/ajde/core/internal/AjdeCoreBuildManager.java

@@ -177,9 +177,8 @@ public class AjdeCoreBuildManager {
 		}
 
 		StringBuffer formattedOptions = new StringBuffer();
-		Iterator<?> it = options.iterator();
-		while (it.hasNext()) {
-			String o = it.next().toString();
+		for (Object option : options) {
+			String o = option.toString();
 			if (formattedOptions.length() > 0) {
 				formattedOptions.append(", ");
 			}

ajde/src/main/java/org/aspectj/ajde/internal/LstBuildConfigFileUpdater.java

@@ -81,9 +81,8 @@ class LstBuildConfigFileUpdater {
 	}
 
 	public boolean exists(String entry, String configFile, String rootPath) {
-		Iterator it = readConfigFile(configFile).iterator();
-		while (it.hasNext()) {
-			if ((entry).equals(rootPath + "/" + (String) it.next())) {
+		for (String s : readConfigFile(configFile)) {
+			if ((entry).equals(rootPath + "/" + s)) {
 				return true;
 			}
 		}
@@ -188,9 +187,8 @@ class LstBuildConfigFileUpdater {
 	public void writeConfigFile(String filePath, List<String> fileContents) {
 		Set<String> contentsSet = new TreeSet<>(fileContents);
 		StringBuffer fileContentsSB = new StringBuffer();
-		Iterator<String> it = contentsSet.iterator();
-		while (it.hasNext()) {
-			fileContentsSB.append(it.next().toString());
+		for (String s : contentsSet) {
+			fileContentsSB.append(s.toString());
 			fileContentsSB.append("\n");
 		}
 		writeFile(fileContentsSB.toString(), filePath);

bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionList.java

@@ -703,9 +703,7 @@ public class InstructionList implements Serializable {
 
 			Set<InstructionTargeter> targeters = ih.getTargeters();
 			boolean isOK = false;
-			Iterator<InstructionTargeter> tIter = targeters.iterator();
-			while (tIter.hasNext()) {
-				InstructionTargeter instructionTargeter = tIter.next();
+			for (InstructionTargeter instructionTargeter : targeters) {
 				if (instructionTargeter.getClass().getName().endsWith("ShadowRange")
 						|| instructionTargeter.getClass().getName().endsWith("ExceptionRange")
 						|| instructionTargeter.getClass().getName().endsWith("LineNumberTag")) {

org.aspectj.ajdt.core/src/main/java/org/aspectj/org/eclipse/jdt/core/dom/AjASTConverter.java

@@ -1993,9 +1993,8 @@ public class AjASTConverter extends ASTConverter {
 					if (this.resolveBindings) {
 						recordNodes(docComment, javadoc);
 						// resolve member and method references binding
-						Iterator tags = docComment.tags().listIterator();
-						while (tags.hasNext()) {
-							recordNodes(javadoc, (TagElement) tags.next());
+						for (Object o : docComment.tags()) {
+							recordNodes(javadoc, (TagElement) o);
 						}
 					}
 					bodyDeclaration.setJavadoc(docComment);
@@ -2016,9 +2015,8 @@ public class AjASTConverter extends ASTConverter {
 					if (this.resolveBindings) {
 						recordNodes(docComment, javadoc);
 						// resolve member and method references binding
-						Iterator tags = docComment.tags().listIterator();
-						while (tags.hasNext()) {
-							recordNodes(javadoc, (TagElement) tags.next());
+						for (Object o : docComment.tags()) {
+							recordNodes(javadoc, (TagElement) o);
 						}
 					}
 					packageDeclaration.setJavadoc(docComment);
@@ -3389,9 +3387,8 @@ public class AjASTConverter extends ASTConverter {
 	}
 
 	protected void recordNodes(org.aspectj.org.eclipse.jdt.internal.compiler.ast.Javadoc javadoc, TagElement tagElement) {
-		Iterator fragments = tagElement.fragments().listIterator();
-		while (fragments.hasNext()) {
-			ASTNode node = (ASTNode) fragments.next();
+		for (Object value : tagElement.fragments()) {
+			ASTNode node = (ASTNode) value;
 			if (node.getNodeType() == ASTNode.MEMBER_REF) {
 				MemberRef memberRef = (MemberRef) node;
 				Name name = memberRef.getName();
@@ -3404,16 +3401,16 @@ public class AjASTConverter extends ASTConverter {
 				}
 				// Replace qualifier to have all nodes recorded
 				if (memberRef.getQualifier() != null) {
-					org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference typeRef = null;
+					TypeReference typeRef = null;
 					if (compilerNode instanceof JavadocFieldReference) {
 						org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression expression = ((JavadocFieldReference) compilerNode).receiver;
-						if (expression instanceof org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference) {
-							typeRef = (org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference) expression;
+						if (expression instanceof TypeReference) {
+							typeRef = (TypeReference) expression;
 						}
 					} else if (compilerNode instanceof JavadocMessageSend) {
 						org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression expression = ((JavadocMessageSend) compilerNode).receiver;
-						if (expression instanceof org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference) {
-							typeRef = (org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference) expression;
+						if (expression instanceof TypeReference) {
+							typeRef = (TypeReference) expression;
 						}
 					}
 					if (typeRef != null) {
@@ -3431,16 +3428,16 @@ public class AjASTConverter extends ASTConverter {
 				if (compilerNode != null) {
 					recordNodes(methodRef, compilerNode);
 					// get type ref
-					org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference typeRef = null;
+					TypeReference typeRef = null;
 					if (compilerNode instanceof org.aspectj.org.eclipse.jdt.internal.compiler.ast.JavadocAllocationExpression) {
 						typeRef = ((org.aspectj.org.eclipse.jdt.internal.compiler.ast.JavadocAllocationExpression) compilerNode).type;
 						if (typeRef != null) {
 							recordNodes(name, compilerNode);
 						}
-					} else if (compilerNode instanceof org.aspectj.org.eclipse.jdt.internal.compiler.ast.JavadocMessageSend) {
-						org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression expression = ((org.aspectj.org.eclipse.jdt.internal.compiler.ast.JavadocMessageSend) compilerNode).receiver;
-						if (expression instanceof org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference) {
-							typeRef = (org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference) expression;
+					} else if (compilerNode instanceof JavadocMessageSend) {
+						org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression expression = ((JavadocMessageSend) compilerNode).receiver;
+						if (expression instanceof TypeReference) {
+							typeRef = (TypeReference) expression;
 						}
 						// TODO (frederic) remove following line to fix bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=62650
 						recordNodes(name, compilerNode);
@@ -3451,16 +3448,15 @@ public class AjASTConverter extends ASTConverter {
 					}
 				}
 				// Resolve parameters
-				Iterator parameters = methodRef.parameters().listIterator();
-				while (parameters.hasNext()) {
-					MethodRefParameter param = (MethodRefParameter) parameters.next();
+				for (Object o : methodRef.parameters()) {
+					MethodRefParameter param = (MethodRefParameter) o;
 					org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression expression = (org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression) javadoc
 							.getNodeStartingAt(param.getStartPosition());
 					if (expression != null) {
 						recordNodes(param, expression);
 						if (expression instanceof JavadocArgumentExpression) {
 							JavadocArgumentExpression argExpr = (JavadocArgumentExpression) expression;
-							org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference typeRef = argExpr.argument.type;
+							TypeReference typeRef = argExpr.argument.type;
 							if (this.ast.apiLevel >= AST.JLS3) {
 								param.setVarargs(argExpr.argument.isVarArgs());
 							}

org.aspectj.matcher/src/main/java/org/aspectj/weaver/Dump.java

@@ -424,9 +424,8 @@ public class Dump {
 	}
 
 	private void println(Properties props) {
-		Iterator iter = props.keySet().iterator();
-		while (iter.hasNext()) {
-			String key = (String) iter.next();
+		for (Object o : props.keySet()) {
+			String key = (String) o;
 			String value = props.getProperty(key);
 			print.println(key + "=" + value);
 		}

taskdefs/src/main/java/org/aspectj/tools/ant/taskdefs/Ajc2.java

@@ -416,11 +416,10 @@ public class Ajc2 extends Javac {
         List newIncludes = new ArrayList();
         List newArguments = new ArrayList();
         if (argfiles != null) {
-            Iterator iter = argfiles.iterator();
-            while (iter.hasNext()) {
-                File argfile = ((Argfile)iter.next()).getFile();
-                expandArgfile(argfile, newIncludes, newArguments);
-            }
+			for (Object o : argfiles) {
+				File argfile = ((Argfile) o).getFile();
+				expandArgfile(argfile, newIncludes, newArguments);
+			}
         }
 
         // If there aren't any includes, but we've used an argfile then we should
@@ -445,10 +444,9 @@ public class Ajc2 extends Javac {
         }
 
         // Add the new included files
-        Iterator iter = newIncludes.iterator();
-        while (iter.hasNext()) {
-            newFiles.add((File)iter.next());
-        }
+		for (Object newInclude : newIncludes) {
+			newFiles.add((File) newInclude);
+		}
 
         // This is the same behavior found in Javac
         int newFileSize = newFiles.size();

weaver/src/main/java/org/aspectj/weaver/bcel/BcelClassWeaver.java

@@ -2324,9 +2324,7 @@ class BcelClassWeaver implements IClassWeaver {
 
 			// copy over tags and range attributes
 
-			Iterator<InstructionTargeter> tIter = src.getTargeters().iterator();
-			while (tIter.hasNext()) {
-				InstructionTargeter old = tIter.next();
+			for (InstructionTargeter old : src.getTargeters()) {
 				if (old instanceof Tag) {
 					Tag oldTag = (Tag) old;
 					Tag fresh = tagMap.get(oldTag);

weaver/src/main/java/org/aspectj/weaver/bcel/BcelShadow.java

@@ -555,9 +555,7 @@ public class BcelShadow extends Shadow {
 		if (startOfHandler.getInstruction().isStoreInstruction() && startOfHandler.getNext() != null) {
 			int slot = startOfHandler.getInstruction().getIndex();
 			// System.out.println("got store: " + startOfHandler.getInstruction() + ", " + index);
-			Iterator<InstructionTargeter> tIter = startOfHandler.getNext().getTargeters().iterator();
-			while (tIter.hasNext()) {
-				InstructionTargeter targeter = tIter.next();
+			for (InstructionTargeter targeter : startOfHandler.getNext().getTargeters()) {
 				if (targeter instanceof LocalVariableTag) {
 					LocalVariableTag t = (LocalVariableTag) targeter;
 					if (t.getSlot() == slot) {

weaver/src/main/java/org/aspectj/weaver/bcel/LazyMethodGen.java

@@ -658,9 +658,8 @@ public final class LazyMethodGen implements Traceable {
 			// boolean hasPendingTargeters = false;
 			int lcounter = 0;
 			for (InstructionHandle ih = body.getStart(); ih != null; ih = ih.getNext()) {
-				Iterator<InstructionTargeter> tIter = ih.getTargeters().iterator();
-				while (tIter.hasNext()) {
-					InstructionTargeter t = tIter.next();// targeters
+				// targeters
+				for (InstructionTargeter t : ih.getTargeters()) {
 					// [
 					// i
 					// ]
@@ -1708,9 +1707,8 @@ public final class LazyMethodGen implements Traceable {
 //	}
 
 	private static void assertTargetedBy(InstructionHandle target, InstructionTargeter targeter, String from) {
-		Iterator tIter = target.getTargeters().iterator();
-		while (tIter.hasNext()) {
-			if (((InstructionTargeter) tIter.next()) == targeter) {
+		for (InstructionTargeter instructionTargeter : target.getTargeters()) {
+			if (instructionTargeter == targeter) {
 				return;
 			}
 		}

weaver/src/main/java/org/aspectj/weaver/bcel/Range.java

@@ -194,9 +194,7 @@ abstract class Range implements InstructionTargeter {
 	protected static final Range getRange(InstructionHandle ih) {
 		// assert isRangeHandle(ih)
 		Range ret = null;
-		Iterator<InstructionTargeter> tIter = ih.getTargeters().iterator();
-		while (tIter.hasNext()) {
-			InstructionTargeter targeter = tIter.next();
+		for (InstructionTargeter targeter : ih.getTargeters()) {
 			if (targeter instanceof Range) {
 				Range r = (Range) targeter;
 				if (r.getStart() != ih && r.getEnd() != ih) {

weaver/src/main/java/org/aspectj/weaver/bcel/ShadowRange.java

@@ -190,9 +190,7 @@ final class ShadowRange extends Range {
 		// now go through again and update variable slots that have been altered as a result
 		// of remapping...
 		for (InstructionHandle newIh = freshBody.getStart(); newIh != freshBody.getEnd(); newIh = newIh.getNext()) {
-			Iterator<InstructionTargeter> tIter = newIh.getTargeters().iterator();
-			while (tIter.hasNext()) {
-				InstructionTargeter source = tIter.next();
+			for (InstructionTargeter source : newIh.getTargeters()) {
 				if (source instanceof LocalVariableTag) {
 					LocalVariableTag lvt = (LocalVariableTag) source;
 					if (!lvt.isRemapped() && remap.hasKey(lvt.getSlot())) {

weaver/src/main/java/org/aspectj/weaver/bcel/Utility.java

@@ -580,9 +580,7 @@ public class Utility {
 			if (ih == null) {
 				return -1;
 			}
-			Iterator<InstructionTargeter> tIter = ih.getTargeters().iterator();
-			while (tIter.hasNext()) {
-				InstructionTargeter t = tIter.next();
+			for (InstructionTargeter t : ih.getTargeters()) {
 				if (t instanceof LineNumberTag) {
 					return ((LineNumberTag) t).getLineNumber();
 				}