Package org.openrewrite.java.cleanup

Class SimplifyBooleanExpressionVisitor

java.lang.Object

org.openrewrite.TreeVisitor<org.openrewrite.java.tree.J,org.openrewrite.ExecutionContext>

org.openrewrite.java.JavaVisitor<org.openrewrite.ExecutionContext>

org.openrewrite.java.cleanup.SimplifyBooleanExpressionVisitor

public class SimplifyBooleanExpressionVisitor
extends JavaVisitor<org.openrewrite.ExecutionContext>

Field Summary

Fields inherited from class org.openrewrite.java.JavaVisitor

javadocVisitor

Constructor Summary

Constructors

Constructor	Description
SimplifyBooleanExpressionVisitor()

Method Summary

Modifier and Type	Method	Description
protected boolean	shouldSimplifyEqualsOn(org.openrewrite.java.tree.J j)	Determines whether an equals comparison with a boolean literal can be simplified.
org.openrewrite.java.tree.J	visitBinary(org.openrewrite.java.tree.J.Binary binary, org.openrewrite.ExecutionContext ctx)
org.openrewrite.java.tree.J	visitMethodInvocation(org.openrewrite.java.tree.J.MethodInvocation method, org.openrewrite.ExecutionContext executionContext)
<T extends org.openrewrite.java.tree.J> org.openrewrite.java.tree.J	visitParentheses(org.openrewrite.java.tree.J.Parentheses<T> parens, org.openrewrite.ExecutionContext ctx)
org.openrewrite.java.tree.J	visitTernary(org.openrewrite.java.tree.J.Ternary ternary, org.openrewrite.ExecutionContext executionContext)
org.openrewrite.java.tree.J	visitUnary(org.openrewrite.java.tree.J.Unary unary, org.openrewrite.ExecutionContext ctx)

Methods inherited from class org.openrewrite.java.JavaVisitor

autoFormat, autoFormat, autoFormat, getJavadocVisitor, getLanguage, isAcceptable, isInSameNameScope, isInSameNameScope, maybeAddImport, maybeAddImport, maybeAddImport, maybeAddImport, maybeAddImport, maybeAddImport, maybeAutoFormat, maybeAutoFormat, maybeAutoFormat, maybeRemoveBlankLines, maybeRemoveBlankLines, maybeRemoveImport, maybeRemoveImport, service, visitAnnotatedType, visitAnnotation, visitArrayAccess, visitArrayDimension, visitArrayType, visitAssert, visitAssignment, visitAssignmentOperation, visitBlock, visitBreak, visitCase, visitCatch, visitClassDeclaration, visitCompilationUnit, visitContainer, visitContinue, visitControlParentheses, visitDeconstructionPattern, visitDoWhileLoop, visitElse, visitEmpty, visitEnumValue, visitEnumValueSet, visitErroneous, visitExpression, visitFieldAccess, visitForControl, visitForEachControl, visitForEachLoop, visitForLoop, visitIdentifier, visitIf, visitImport, visitInstanceOf, visitIntersectionType, visitLabel, visitLambda, visitLambdaParameters, visitLeftPadded, visitLiteral, visitMemberReference, visitMethodDeclaration, visitModifier, visitMultiCatch, visitNewArray, visitNewClass, visitNullableType, visitPackage, visitParameterizedType, visitParenthesizedTypeTree, visitPrimitive, visitReturn, visitRightPadded, visitSpace, visitStatement, visitSwitch, visitSwitchExpression, visitSynchronized, visitThrow, visitTry, visitTryResource, visitType, visitTypeCast, visitTypeName, visitTypeParameter, visitTypeParameters, visitUnknown, visitUnknownSource, visitVariable, visitVariableDeclarations, visitWhileLoop, visitWildcard, visitYield

Methods inherited from class org.openrewrite.TreeVisitor

adapt, collect, collect, defaultValue, doAfterVisit, getAfterVisit, getCursor, isAdaptableTo, noop, postVisit, preVisit, reduce, reduce, reduce, setCursor, stopAfterPreVisit, updateCursor, visit, visit, visit, visitAndCast, visitAndCast, visitMarker, visitMarkers, visitNonNull, visitNonNull, visitorTreeType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SimplifyBooleanExpressionVisitor

public SimplifyBooleanExpressionVisitor()

Method Details

visitBinary

public org.openrewrite.java.tree.J visitBinary(org.openrewrite.java.tree.J.Binary binary,
 org.openrewrite.ExecutionContext ctx)

Overrides:

visitBinary in class JavaVisitor<org.openrewrite.ExecutionContext>

visitParentheses

public <T extends org.openrewrite.java.tree.J>
org.openrewrite.java.tree.J visitParentheses(org.openrewrite.java.tree.J.Parentheses<T> parens,
 org.openrewrite.ExecutionContext ctx)

Overrides:

visitParentheses in class JavaVisitor<org.openrewrite.ExecutionContext>

visitUnary

public org.openrewrite.java.tree.J visitUnary(org.openrewrite.java.tree.J.Unary unary,
 org.openrewrite.ExecutionContext ctx)

Overrides:

visitUnary in class JavaVisitor<org.openrewrite.ExecutionContext>

visitTernary

public org.openrewrite.java.tree.J visitTernary(org.openrewrite.java.tree.J.Ternary ternary,
 org.openrewrite.ExecutionContext executionContext)

Overrides:

visitTernary in class JavaVisitor<org.openrewrite.ExecutionContext>

visitMethodInvocation

public org.openrewrite.java.tree.J visitMethodInvocation(org.openrewrite.java.tree.J.MethodInvocation method,
 org.openrewrite.ExecutionContext executionContext)

Overrides:

visitMethodInvocation in class JavaVisitor<org.openrewrite.ExecutionContext>

shouldSimplifyEqualsOn

protected boolean shouldSimplifyEqualsOn(org.openrewrite.java.tree.J j)

Determines whether an equals comparison with a boolean literal can be simplified.

In Java, x == true can always be simplified to x. In Kotlin and other languages, nullable types like Boolean? compared with == true have different semantics than using the value directly, e.g. nullableBoolean == true evaluates to false when null, whereas using nullableBoolean directly would be a type error.

For non-Java languages, simplification is only allowed when the expression type is primitive boolean (non-nullable).

Parameters:

j - the expression to simplify

Returns:

true if the equals comparison can be safely simplified