diff --git a/src/main/java/spoon/refactoring/CtParameterRemoveRefactoring.java b/src/main/java/spoon/refactoring/CtParameterRemoveRefactoring.java
new file mode 100644
index 00000000000..6e7a89aad74
--- /dev/null
+++ b/src/main/java/spoon/refactoring/CtParameterRemoveRefactoring.java
@@ -0,0 +1,341 @@
+/**
+ * Copyright (C) 2006-2017 INRIA and contributors
+ * Spoon - http://spoon.gforge.inria.fr/
+ *
+ * This software is governed by the CeCILL-C License under French law and
+ * abiding by the rules of distribution of free software. You can use, modify
+ * and/or redistribute the software under the terms of the CeCILL-C license as
+ * circulated by CEA, CNRS and INRIA at http://www.cecill.info.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the CeCILL-C License for more details.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL-C license and that you accept its terms.
+ */
+package spoon.refactoring;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import spoon.SpoonException;
+import spoon.reflect.code.CtAnnotationFieldAccess;
+import spoon.reflect.code.CtArrayRead;
+import spoon.reflect.code.CtExpression;
+import spoon.reflect.code.CtFieldRead;
+import spoon.reflect.code.CtInvocation;
+import spoon.reflect.code.CtLiteral;
+import spoon.reflect.code.CtNewArray;
+import spoon.reflect.code.CtThisAccess;
+import spoon.reflect.code.CtVariableRead;
+import spoon.reflect.declaration.CtElement;
+import spoon.reflect.declaration.CtExecutable;
+import spoon.reflect.declaration.CtParameter;
+import spoon.reflect.reference.CtExecutableReference;
+import spoon.reflect.reference.CtParameterReference;
+import spoon.reflect.visitor.CtAbstractVisitor;
+import spoon.reflect.visitor.chain.CtConsumer;
+import spoon.reflect.visitor.filter.AllMethodsSameSignatureFunction;
+import spoon.reflect.visitor.filter.ExecutableReferenceFilter;
+import spoon.reflect.visitor.filter.ParameterReferenceFunction;
+
+/**
+ * Removes target {@link CtParameter} from the parent target {@link CtExecutable}
+ * and from all overriding/overridden methods of related type hierarchies
+ * and from all lambda expressions (if any) implementing the modified interface.
+ * It removes arguments from all invocations of refactored executables too.
+ *
+ * Before the refactoring is started it checks that:
+ *
+ * - to be removed parameter is NOT used in any refactored implementation
+ *
- to be removed argument contains read only expression, which can be safely removed
+ *
+ * If one of the validation constraints fails, then {@link RefactoringException} is thrown and nothing is changed.
+ * You can override `#create*Issue(...)` methods to handle such exceptions individually.
+ *
+ */
+public class CtParameterRemoveRefactoring implements CtRefactoring {
+
+ private CtParameter> target;
+ private int parameterIndex;
+ /**
+ * List of all {@link CtExecutable}s whose parameter has to be removed
+ */
+ private List> targetExecutables;
+ /**
+ * List of all {@link CtInvocation}s whose argument has to be removed
+ */
+ private List> targetInvocations;
+
+ public CtParameterRemoveRefactoring() {
+ }
+
+ /**
+ * @return the {@link CtParameter} which has to be removed by this refactoring function
+ */
+ public CtParameter> getTarget() {
+ return target;
+ }
+
+ /**
+ * @param target the {@link CtParameter} which has to be removed by this refactoring function
+ * @return this to support fluent API
+ */
+ public CtParameterRemoveRefactoring setTarget(CtParameter> target) {
+ if (this.target == target) {
+ return this;
+ }
+ this.target = target;
+ this.parameterIndex = target.getParent().getParameters().indexOf(target);
+ targetExecutables = null;
+ targetInvocations = null;
+ return this;
+ }
+
+ /**
+ * @return computes and returns all executables, which will be modified by this refactoring
+ */
+ public List> getTargetExecutables() {
+ if (targetExecutables == null) {
+ computeAllExecutables();
+ }
+ return targetExecutables;
+ }
+
+ /**
+ * @return computes and returns all invocations, which will be modified by this refactoring
+ */
+ public List> getTargetInvocations() {
+ if (targetInvocations == null) {
+ computeAllInvocations();
+ }
+ return targetInvocations;
+ }
+
+ @Override
+ public void refactor() {
+ if (getTarget() == null) {
+ throw new SpoonException("The target of refactoring is not defined");
+ }
+ detectIssues();
+ refactorNoCheck();
+ }
+
+ /**
+ * validates whether this refactoring can be done without changing behavior of the refactored code.
+ */
+ protected void detectIssues() {
+ checkAllExecutables();
+ checkAllInvocations();
+ }
+
+ /**
+ * search for all methods and lambdas which has to be refactored together with target method
+ */
+ private void computeAllExecutables() {
+ if (getTarget() == null) {
+ throw new SpoonException("The target of refactoring is not defined");
+ }
+ final List> executables = new ArrayList<>();
+ CtExecutable> targetExecutable = target.getParent();
+ //all the executables, which belongs to same inheritance tree
+ executables.add(targetExecutable);
+ targetExecutable.map(new AllMethodsSameSignatureFunction()).forEach(new CtConsumer>() {
+ @Override
+ public void accept(CtExecutable> executable) {
+ executables.add(executable);
+ }
+ });
+ targetExecutables = Collections.unmodifiableList(executables);
+ }
+
+ /**
+ * search for all methods and lambdas which has to be refactored together with target method
+ */
+ private void computeAllInvocations() {
+ ExecutableReferenceFilter execRefFilter = new ExecutableReferenceFilter();
+ for (CtExecutable> exec : getTargetExecutables()) {
+ execRefFilter.addExecutable(exec);
+ }
+ //all the invocations, which belongs to same inheritance tree
+ final List> invocations = new ArrayList<>();
+ target.getFactory().getModel().getRootPackage().filterChildren(execRefFilter).forEach(new CtConsumer>() {
+ @Override
+ public void accept(CtExecutableReference> t) {
+ CtElement parent = t.getParent();
+ if (parent instanceof CtInvocation>) {
+ invocations.add((CtInvocation>) parent);
+ } //else ignore other hits, which are not in context of invocation
+ }
+ });
+ targetInvocations = Collections.unmodifiableList(invocations);
+ }
+
+ private void checkAllExecutables() {
+ for (CtExecutable> executable : getTargetExecutables()) {
+ checkExecutable(executable);
+ }
+ }
+
+ private void checkExecutable(CtExecutable> executable) {
+ final CtParameter> toBeRemovedParam = executable.getParameters().get(this.parameterIndex);
+ toBeRemovedParam.map(new ParameterReferenceFunction()).forEach(new CtConsumer>() {
+ @Override
+ public void accept(CtParameterReference> paramRef) {
+ //some parameter uses are acceptable
+ //e.g. parameter in invocation of super of method, which is going to be removed too.
+ if (isAllowedParameterUsage(paramRef)) {
+ return;
+ }
+ createParameterUsedIssue(toBeRemovedParam, paramRef);
+ }
+ });
+ }
+
+ private void checkAllInvocations() {
+ for (CtInvocation> invocation : getTargetInvocations()) {
+ checkInvocation(invocation);
+ }
+ }
+
+ private void checkInvocation(CtInvocation> invocation) {
+ final CtExpression> toBeRemovedExpression = invocation.getArguments().get(this.parameterIndex);
+ if (canRemoveExpression(toBeRemovedExpression) == false) {
+ createExpressionCannotBeRemovedIssue(invocation, toBeRemovedExpression);
+ }
+ }
+
+ /**
+ * Detects whether found usage of removed parameter is acceptable
+ * @param paramRef the found reference to
+ * @return true if it is allowed parameter use
+ */
+ protected boolean isAllowedParameterUsage(CtParameterReference> paramRef) {
+ if (isRemovedParamOfRefactoredInvocation(paramRef)) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Detects whether `toBeRemovedExpression` can be safely removed during the refactoring
+ *
+ * @param toBeRemovedExpression the {@link CtExpression}, which will be removed by this refactoring
+ * @return true if the expression used to deliver argument of removed parameter can be removed
+ * false if cannot be removed and this refactoring has to be avoided.
+ */
+ protected boolean canRemoveExpression(CtExpression> toBeRemovedExpression) {
+ class Context {
+ boolean canBeRemoved = false;
+ }
+ final Context context = new Context();
+ toBeRemovedExpression.accept(new CtAbstractVisitor() {
+ @Override
+ public void visitCtVariableRead(CtVariableRead variableRead) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtArrayRead(CtArrayRead arrayRead) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtFieldRead(CtFieldRead fieldRead) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtParameterReference(CtParameterReference reference) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtLiteral(CtLiteral literal) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtNewArray(CtNewArray newArray) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtAnnotationFieldAccess(CtAnnotationFieldAccess annotationFieldAccess) {
+ context.canBeRemoved = true;
+ }
+ @Override
+ public void visitCtThisAccess(CtThisAccess thisAccess) {
+ context.canBeRemoved = true;
+ }
+ //There are more expression which is save to remove. Including tree of unary/binary operators, conditional, etc.
+ //It would be good to have a Filter, which matches read only expressions
+ });
+ return context.canBeRemoved;
+ }
+
+ protected boolean isRemovedParamOfRefactoredInvocation(CtParameterReference> paramRef) {
+ CtInvocation> invocation = paramRef.getParent(CtInvocation.class);
+ if (invocation == null) {
+ return false;
+ }
+ return getTargetInvocations().contains(invocation);
+/* CtExecutableReference> execRef = invocation.getExecutable();
+ if (execRef == null) {
+ return false;
+ }
+ CtExecutable> exec = execRef.getDeclaration();
+ if (getTargetExecutables().indexOf(exec) == -1) {
+ return false;
+ }
+ //TODO detect acceptable parameter
+ //some.toBeModifiedMethod(anotherMethod(toBeRemovedParam))
+ //make it possible to decide what code can be removed
+ //invocation.getArguments()...
+ return true;*/
+ }
+
+ /**
+ * Override this method to get access to details about this refactoring issue
+ * @param usedParameter to be removed parameter, which is used by `parameterUsage`
+ * @param parameterUsage the usage of parameter, which avoids it's remove
+ */
+ protected void createParameterUsedIssue(CtParameter> usedParameter, CtParameterReference> parameterUsage) {
+ throw new RefactoringException("The parameter " + usedParameter.getSimpleName()
+ + " of method: " + parameterUsage.getDeclaringExecutable() + " cannot be removed because it is used (" + parameterUsage.getPosition() + ")");
+ }
+
+ /**
+ * Override this method to get access to details about this refactoring issue.
+ * @param toBeRemovedExpression is the expression which delivers value for the argument of the removed parameter,
+ * where {@link #canRemoveExpression(CtExpression)} returned false.
+ */
+ protected void createExpressionCannotBeRemovedIssue(CtInvocation> invocation, CtExpression> toBeRemovedExpression) {
+ throw new RefactoringException("The expression " + toBeRemovedExpression
+ + ", which creates argument of the to be removed parameter in invocation " + invocation + " cannot be removed."
+ + " Override method `canRemoveExpression` to customize this behavior.");
+ }
+
+ protected void refactorNoCheck() {
+ removeInvocationArguments();
+ removeMethodParameters();
+ }
+
+ protected void removeInvocationArguments() {
+ List> invocations = getTargetInvocations();
+ for (CtInvocation> invocation : invocations) {
+ removeInvocationArgument(invocation);
+ }
+ }
+
+ protected void removeInvocationArgument(CtInvocation> invocation) {
+ invocation.removeArgument(invocation.getArguments().get(this.parameterIndex));
+ }
+
+ protected void removeMethodParameters() {
+ List> executables = getTargetExecutables();
+ for (CtExecutable> executable : executables) {
+ removeParameter(executable);
+ }
+ }
+
+ protected void removeParameter(CtExecutable> executable) {
+ executable.removeParameter(executable.getParameters().get(this.parameterIndex));
+ }
+}