gr.uom.java.xmi.decomposition.AbstractCodeFragment Maven / Gradle / Ivy
package gr.uom.java.xmi.decomposition;
import static gr.uom.java.xmi.Constants.JAVA;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import gr.uom.java.xmi.LocationInfo;
import gr.uom.java.xmi.LocationInfo.CodeElementType;
import gr.uom.java.xmi.LocationInfoProvider;
import gr.uom.java.xmi.decomposition.AbstractCall.StatementCoverageType;
import gr.uom.java.xmi.diff.UMLAbstractClassDiff;
public abstract class AbstractCodeFragment implements LocationInfoProvider {
private int depth;
private int index;
private String codeFragmentAfterReplacingParametersWithArguments;
public String getArgumentizedString() {
return codeFragmentAfterReplacingParametersWithArguments != null ? codeFragmentAfterReplacingParametersWithArguments : getString();
}
public int getDepth() {
return depth;
}
public void setDepth(int depth) {
this.depth = depth;
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
this.index = index;
}
public abstract CompositeStatementObject getParent();
public abstract String getString();
public abstract List getVariables();
public abstract List getTypes();
public abstract List getVariableDeclarations();
public abstract List getMethodInvocations();
public abstract List getAnonymousClassDeclarations();
public abstract List getStringLiterals();
public abstract List getCharLiterals();
public abstract List getNumberLiterals();
public abstract List getNullLiterals();
public abstract List getBooleanLiterals();
public abstract List getTypeLiterals();
public abstract List getCreations();
public abstract List getInfixExpressions();
public abstract List getInfixOperators();
public abstract List getArrayAccesses();
public abstract List getPrefixExpressions();
public abstract List getPostfixExpressions();
public abstract List getThisExpressions();
public abstract List getArguments();
public abstract List getParenthesizedExpressions();
public abstract List getCastExpressions();
public abstract List getTernaryOperatorExpressions();
public abstract List getLambdas();
public abstract VariableDeclaration searchVariableDeclaration(String variableName);
public abstract VariableDeclaration getVariableDeclaration(String variableName);
public List findExpression(String s) {
Set locations = new HashSet<>();
List matchingExpressions = new ArrayList<>();
for(LeafExpression expression : getVariables()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(AbstractCall expression : getMethodInvocations()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression.asLeafExpression());
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getStringLiterals()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getNumberLiterals()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getNullLiterals()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getBooleanLiterals()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getTypeLiterals()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(AbstractCall expression : getCreations()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression.asLeafExpression());
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getInfixExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getArrayAccesses()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getPrefixExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getPostfixExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getThisExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getCastExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getParenthesizedExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
locations.add(expression.getLocationInfo());
}
}
for(TernaryOperatorExpression expression : getTernaryOperatorExpressions()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression.asLeafExpression());
locations.add(expression.getLocationInfo());
}
}
for(LeafExpression expression : getArguments()) {
if(expression.getString().equals(s)) {
if(!locations.contains(expression.getLocationInfo()))
matchingExpressions.add(expression);
}
}
return matchingExpressions;
}
public boolean isKeyword() {
String statement = getString();
return statement.equals(JAVA.RETURN_STATEMENT) ||
statement.equals(JAVA.BREAK_STATEMENT) ||
statement.equals(JAVA.CONTINUE_STATEMENT);
}
public boolean isLogCall() {
AbstractCall call = invocationCoveringEntireFragment();
if(call != null && call.isLog()) {
return true;
}
return false;
}
public boolean isAssertCall() {
AbstractCall call = invocationCoveringEntireFragment();
if(call != null && call.getName().startsWith("assert")) {
return true;
}
return false;
}
public void replaceParametersWithArguments(Map parameterToArgumentMap) {
String afterReplacements = getString();
Set anonymousClassMethodDeclarationLines = new LinkedHashSet<>();
if(StringBasedHeuristics.containsMethodSignatureOfAnonymousClass(afterReplacements)) {
String[] lines = afterReplacements.split("\\n");
for(String line : lines) {
line = VariableReplacementAnalysis.prepareLine(line);
if(Visitor.METHOD_SIGNATURE_PATTERN.matcher(line).matches()) {
anonymousClassMethodDeclarationLines.add(line);
}
}
}
for(String parameter : parameterToArgumentMap.keySet()) {
String argument = parameterToArgumentMap.get(parameter);
if(!parameter.equals(argument)) {
StringBuffer sb = new StringBuffer();
Pattern p = Pattern.compile(Pattern.quote(parameter));
Matcher m = p.matcher(afterReplacements);
while(m.find()) {
//check if the matched string is an argument
//previous character should be "(" or "," or " " or there is no previous character
int start = m.start();
boolean isArgument = false;
boolean isInsideStringLiteral = false;
if(start >= 1) {
String previousChar = afterReplacements.substring(start-1, start);
if(previousChar.equals("(") || previousChar.equals(",") || previousChar.equals(" ") || previousChar.equals(JAVA.ASSIGNMENT)) {
int indexOfNextChar = start + parameter.length();
if(afterReplacements.length() > indexOfNextChar) {
char nextChar = afterReplacements.charAt(indexOfNextChar);
if(!Character.isLetterOrDigit(nextChar)) {
isArgument = true;
}
}
if(parameter.endsWith(".")) {
isArgument = true;
}
}
String beforeMatch = afterReplacements.substring(0, start);
String afterMatch = afterReplacements.substring(start+parameter.length(), afterReplacements.length());
if(quoteBefore(beforeMatch) && quoteAfter(afterMatch)) {
isInsideStringLiteral = true;
}
}
else if(start == 0 && !afterReplacements.startsWith(JAVA.RETURN_SPACE)) {
int indexOfNextChar = start + parameter.length();
if(afterReplacements.length() > indexOfNextChar) {
char nextChar = afterReplacements.charAt(indexOfNextChar);
if(!Character.isLetterOrDigit(nextChar)) {
isArgument = true;
}
}
if(parameter.endsWith(".")) {
isArgument = true;
}
}
boolean isWithinMethodSignature = false;
for(String methodSignatureLine : anonymousClassMethodDeclarationLines) {
int methodSignatureStart = getString().indexOf(methodSignatureLine);
if(methodSignatureStart != -1 && methodSignatureStart < start && methodSignatureStart + methodSignatureLine.length() > start) {
isWithinMethodSignature = true;
break;
}
}
if(isArgument && !isInsideStringLiteral && !isWithinMethodSignature) {
m.appendReplacement(sb, Matcher.quoteReplacement(argument));
}
}
m.appendTail(sb);
afterReplacements = sb.toString();
}
}
this.codeFragmentAfterReplacingParametersWithArguments = afterReplacements;
}
private static boolean quoteBefore(String beforeMatch) {
if(beforeMatch.contains("\"")) {
if(beforeMatch.contains("+")) {
int indexOfQuote = beforeMatch.lastIndexOf("\"");
int indexOfPlus = beforeMatch.lastIndexOf("+");
if(indexOfPlus > indexOfQuote) {
return false;
}
else {
return true;
}
}
else {
return true;
}
}
return false;
}
private static boolean quoteAfter(String afterMatch) {
if(afterMatch.contains("\"")) {
if(afterMatch.contains("+")) {
int indexOfQuote = afterMatch.indexOf("\"");
int indexOfPlus = afterMatch.indexOf("+");
if(indexOfPlus < indexOfQuote) {
return false;
}
else {
return true;
}
}
else {
return true;
}
}
return false;
}
public boolean equalFragment(AbstractCodeFragment other) {
if(this.getString().equals(other.getString())) {
return true;
}
else if(this.getString().contains(other.getString())) {
return true;
}
else if(other.getString().contains(this.getString())) {
return true;
}
else if(this.codeFragmentAfterReplacingParametersWithArguments != null) {
return this.codeFragmentAfterReplacingParametersWithArguments.equals(other.getString());
}
else if(other.codeFragmentAfterReplacingParametersWithArguments != null) {
return other.codeFragmentAfterReplacingParametersWithArguments.equals(this.getString());
}
return false;
}
public void resetArgumentization() {
this.codeFragmentAfterReplacingParametersWithArguments = getString();
}
public String infixExpressionCoveringTheEntireFragment() {
String statement = getString();
for(LeafExpression infixExpression : getInfixExpressions()) {
String infix = infixExpression.getString();
if((infix + JAVA.STATEMENT_TERMINATION).equals(statement) || infix.equals(statement)) {
return infix;
}
else if((JAVA.RETURN_SPACE + infix + JAVA.STATEMENT_TERMINATION).equals(statement)) {
return infix;
}
else if(expressionIsTheInitializerOfVariableDeclaration(infix)) {
return infix;
}
else if(("if(" + infix + ")").equals(statement)) {
return infix;
}
else if(("while(" + infix + ")").equals(statement)) {
return infix;
}
}
return null;
}
public ObjectCreation creationCoveringEntireFragment() {
String statement = getString();
for(AbstractCall creation : getCreations()) {
String objectCreation = creation.getString();
if((objectCreation + JAVA.STATEMENT_TERMINATION).equals(statement) || objectCreation.equals(statement)) {
creation.coverage = StatementCoverageType.ONLY_CALL;
return (ObjectCreation) creation;
}
else if((JAVA.RETURN_SPACE + objectCreation + JAVA.STATEMENT_TERMINATION).equals(statement)) {
creation.coverage = StatementCoverageType.RETURN_CALL;
return (ObjectCreation) creation;
}
else if((JAVA.THROW_SPACE + objectCreation + JAVA.STATEMENT_TERMINATION).equals(statement)) {
creation.coverage = StatementCoverageType.THROW_CALL;
return (ObjectCreation) creation;
}
else if(expressionIsTheInitializerOfVariableDeclaration(objectCreation)) {
creation.coverage = StatementCoverageType.VARIABLE_DECLARATION_INITIALIZER_CALL;
return (ObjectCreation) creation;
}
}
return null;
}
public AbstractCall invocationCoveringEntireFragment() {
String statement = getString();
for(AbstractCall invocation : getMethodInvocations()) {
String methodInvocation = invocation.getString();
if((methodInvocation + JAVA.STATEMENT_TERMINATION).equals(statement) || methodInvocation.equals(statement) || ("!" + methodInvocation).equals(statement)) {
invocation.coverage = StatementCoverageType.ONLY_CALL;
return invocation;
}
else if((JAVA.RETURN_SPACE + methodInvocation + JAVA.STATEMENT_TERMINATION).equals(statement)) {
invocation.coverage = StatementCoverageType.RETURN_CALL;
return invocation;
}
else if(isCastExpressionCoveringEntireFragment(methodInvocation)) {
invocation.coverage = StatementCoverageType.CAST_CALL;
return invocation;
}
else if(expressionIsTheInitializerOfVariableDeclaration(methodInvocation)) {
invocation.coverage = StatementCoverageType.VARIABLE_DECLARATION_INITIALIZER_CALL;
return invocation;
}
else if(invocation.getLocationInfo().getCodeElementType().equals(CodeElementType.SUPER_CONSTRUCTOR_INVOCATION) ||
invocation.getLocationInfo().getCodeElementType().equals(CodeElementType.CONSTRUCTOR_INVOCATION)) {
invocation.coverage = StatementCoverageType.ONLY_CALL;
return invocation;
}
}
return null;
}
public ObjectCreation assignmentCreationCoveringEntireStatement() {
for(AbstractCall creation : getCreations()) {
if(expressionIsTheRightHandSideOfAssignment(creation.getString())) {
return (ObjectCreation) creation;
}
}
return null;
}
public AbstractCall assignmentInvocationCoveringEntireStatement() {
for(AbstractCall invocation : getMethodInvocations()) {
if(expressionIsTheRightHandSideOfAssignment(invocation.getString())) {
return invocation;
}
}
return null;
}
public AbstractCall fieldAssignmentInvocationCoveringEntireStatement(UMLAbstractClassDiff classDiff) {
for(AbstractCall invocation : getMethodInvocations()) {
if(expressionIsTheRightHandSideOfAssignmentAndLeftHandSideIsField(invocation.getString(), classDiff)) {
return invocation;
}
for(AbstractCall creation : getCreations()) {
if(creation.arguments().contains(invocation.actualString())) {
if(expressionIsTheRightHandSideOfAssignmentAndLeftHandSideIsField(creation.getString(), classDiff)) {
return invocation;
}
}
}
}
return null;
}
private boolean isCastExpressionCoveringEntireFragment(String expression) {
String statement = getString();
int index = -1;
if(statement.endsWith(JAVA.STATEMENT_TERMINATION)) {
index = statement.indexOf(expression + JAVA.STATEMENT_TERMINATION);
}
else {
index = statement.indexOf(expression);
}
if(index != -1) {
String prefix = statement.substring(0, index);
if(prefix.contains("(") && prefix.contains(")")) {
int indexOfOpeningParenthesis = prefix.indexOf("(");
int indexOfClosingParenthesis = prefix.indexOf(")");
boolean openingParenthesisInsideSingleQuotes = ReplacementUtil.isInsideSingleQuotes(prefix, indexOfOpeningParenthesis);
boolean closingParenthesisInsideSingleQuotes = ReplacementUtil.isInsideSingleQuotes(prefix, indexOfClosingParenthesis);
boolean openingParenthesisInsideDoubleQuotes = ReplacementUtil.isInsideDoubleQuotes(prefix, indexOfOpeningParenthesis);
boolean closingParenthesisIndideDoubleQuotes = ReplacementUtil.isInsideDoubleQuotes(prefix, indexOfClosingParenthesis);
if(indexOfOpeningParenthesis < indexOfClosingParenthesis &&
!openingParenthesisInsideSingleQuotes && !closingParenthesisInsideSingleQuotes &&
!openingParenthesisInsideDoubleQuotes && !closingParenthesisIndideDoubleQuotes) {
String casting = prefix.substring(indexOfOpeningParenthesis, indexOfClosingParenthesis+1);
if(statement.endsWith(JAVA.STATEMENT_TERMINATION) && (JAVA.RETURN_SPACE + casting + expression + JAVA.STATEMENT_TERMINATION).equals(statement)) {
return true;
}
if(!statement.endsWith(JAVA.STATEMENT_TERMINATION) && (casting + expression).equals(statement)) {
return true;
}
}
}
}
return false;
}
protected boolean containsInitializerOfVariableDeclaration(Set expressions) {
List variableDeclarations = getVariableDeclarations();
if(variableDeclarations.size() == 1 && variableDeclarations.get(0).getInitializer() != null) {
String initializer = variableDeclarations.get(0).getInitializer().toString();
if(expressions.contains(initializer) && !getLocationInfo().getCodeElementType().equals(CodeElementType.FOR_STATEMENT)) {
return true;
}
}
return false;
}
private boolean expressionIsTheInitializerOfVariableDeclaration(String expression) {
List variableDeclarations = getVariableDeclarations();
if(variableDeclarations.size() > 0 && variableDeclarations.get(0).getInitializer() != null) {
String initializer = variableDeclarations.get(0).getInitializer().toString();
if(initializer.equals(expression))
return true;
if(initializer.startsWith("(")) {
//ignore casting
String initializerWithoutCasting = initializer.substring(initializer.indexOf(")")+1,initializer.length());
if(initializerWithoutCasting.equals(expression))
return true;
}
}
return false;
}
private boolean expressionIsTheRightHandSideOfAssignment(String expression) {
String statement = getString();
if(statement.contains(JAVA.ASSIGNMENT)) {
List variables = getVariables();
if(variables.size() > 0) {
String s = variables.get(0).getString() + JAVA.ASSIGNMENT + expression + JAVA.STATEMENT_TERMINATION;
if(statement.equals(s)) {
return true;
}
if(statement.startsWith(variables.get(0).getString() + JAVA.ASSIGNMENT)) {
String suffix = statement.substring(statement.indexOf(JAVA.ASSIGNMENT) + 1);
if(suffix.endsWith(expression + JAVA.STATEMENT_TERMINATION)) {
int index = suffix.indexOf(expression + JAVA.STATEMENT_TERMINATION);
String prefix = suffix.substring(0, index);
if(prefix.startsWith("(") && prefix.endsWith(")")) {
return true;
}
}
}
}
}
return false;
}
private boolean expressionIsTheRightHandSideOfAssignmentAndLeftHandSideIsField(String expression, UMLAbstractClassDiff classDiff) {
String statement = getString();
if(statement.contains(JAVA.ASSIGNMENT)) {
List variables = getVariables();
if(variables.size() > 0) {
String variable = variables.get(0).getString();
String s = variable + JAVA.ASSIGNMENT + expression + JAVA.STATEMENT_TERMINATION;
if(statement.equals(s) && (variable.startsWith(JAVA.THIS_DOT) || classDiff.getOriginalClass().getFieldDeclarationMap().containsKey(variable) ||
classDiff.getNextClass().getFieldDeclarationMap().containsKey(variable))) {
return true;
}
String beforeAssignment = statement.substring(0, statement.indexOf(JAVA.ASSIGNMENT));
if(variables.size() >= 2) {
if(beforeAssignment.equals(variable + "." + variables.get(1).getString())) {
return true;
}
}
}
}
return false;
}
public boolean throwsNewException() {
return getString().startsWith(JAVA.THROW_SPACE + "new ");
}
public boolean isLastStatement() {
if(this instanceof AbstractExpression) {
return false;
}
CompositeStatementObject parent = getParent();
if(parent != null && parent.getParent() == null) {
return index == parent.getStatements().size() - 1;
}
return false;
}
public boolean isLastStatementInParentBlock() {
if(this instanceof AbstractExpression) {
return false;
}
CompositeStatementObject parent = getParent();
if(parent != null && parent.getParent() != null) {
return index == parent.getStatements().size() - 1;
}
return false;
}
public boolean countableStatement() {
String statement = getString();
//covers the cases of lambda expressions having an expression as their body
if(this instanceof AbstractExpression) {
return true;
}
//covers the cases of methods with only one statement in their body
if(this instanceof AbstractStatement && ((AbstractStatement)this).getParent() != null &&
((AbstractStatement)this).getParent().statementCount() == 1 && ((AbstractStatement)this).getParent().getParent() == null) {
return true;
}
return !statement.equals(JAVA.OPEN_BLOCK) && !statement.startsWith("catch(") && !statement.startsWith(JAVA.CASE_SPACE) &&
!statement.equals(JAVA.RETURN_TRUE) && !statement.equals(JAVA.RETURN_FALSE) && !statement.equals(JAVA.RETURN_THIS) && !statement.equals(JAVA.RETURN_NULL) && !statement.equals(JAVA.RETURN_STATEMENT);
}
}