fix: allow Step Builder to have a custom setter prefix

processor/src/main/java/io/jonasg/bob/BuilderTypeSpecFactory.java

@@ -240,12 +240,12 @@ protected CodeBlock generateFieldAssignment(BuildableField field) {
 		if (field.isConstructorArgument() && isAnEnforcedConstructorPolicy() || field.isMandatory()) {
 			return CodeBlock.builder()
 					.addStatement("instance.$L(this.$L.orElseThrow())",
-							setterName(field.setterMethodName().orElseThrow()), field.name())
+							field.setterMethodName().orElseThrow(), field.name())
 					.build();
 		} else {
 			return CodeBlock.builder()
 					.addStatement(
-							String.format("instance.%s(this.%s)", setterName(field.setterMethodName().orElseThrow()),
+							String.format("instance.%s(this.%s)", field.setterMethodName().orElseThrow(),
 									field.name()))
 					.build();
 		}

processor/src/main/java/io/jonasg/bob/StepBuilderInterfaceTypeSpecFactory.java

@@ -105,7 +105,7 @@ BuilderDetails typeSpec(String builderImplName) {
 		reversedBuildableFields.stream()
 				.filter(this::notExcluded)
 				.filter(field -> (!field.isConstructorArgument()) && !field.isMandatory())
-				.forEach(field -> buildStepInterfaceBuilder.addMethod(MethodSpec.methodBuilder(field.name())
+				.forEach(field -> buildStepInterfaceBuilder.addMethod(MethodSpec.methodBuilder(setterName(field.name()))
 						.addModifiers(Modifier.PUBLIC, Modifier.ABSTRACT)
 						.returns(ClassName.get("", "BuildStep"))
 						.addParameter(TypeName.get(field.type()), field.name())
@@ -137,7 +137,7 @@ BuilderDetails typeSpec(String builderImplName) {
 					String name = String.format("%sStep", capitalize(field.name()));
 					interfaces.add(ClassName.get("", builderInterfaceName + "." + name));
 					return TypeSpecInterfaceBuilder.functionalInterface(name)
-							.methodName(field.name())
+							.methodName(setterName(field.name()))
 							.addArgument(TypeName.get(field.type()), field.name())
 							.returns(ClassName.get("", nextStep.get().name))
 							.build();
@@ -148,7 +148,7 @@ BuilderDetails typeSpec(String builderImplName) {
 		// the initial field to be built
 		BuildableField buildableField = mandatoryFields
 				.get(mandatoryFields.size() - 1);
-		stepBuilderBuilder.addMethod(MethodSpec.methodBuilder(buildableField.name())
+		stepBuilderBuilder.addMethod(MethodSpec.methodBuilder(setterName(buildableField.name()))
 				.addModifiers(Modifier.PUBLIC, Modifier.ABSTRACT)
 				.addParameter(TypeName.get(buildableField.type()), buildableField.name())
 				.returns(ClassName.get("", nextStep.get().name))
@@ -176,4 +176,12 @@ private <T> List<T> reverseList(List<T> originalList) {
 		}
 		return reversedList;
 	}
+
+	protected String setterName(String name) {
+		if (buildable.setterPrefix().isEmpty()) {
+			return name;
+		}
+		return Formatter.format("$setterPrefix$name", buildable.setterPrefix(),
+				name.substring(0, 1).toUpperCase() + name.substring(1));
+	}
 }

processor/src/test/java/io/jonasg/bob/StrategyTests.java

@@ -225,5 +225,32 @@ void generateStepBuilderWithSingleMandatoryAnnotatedField() {
 									"/tests/Strategies/StepWise/GenerateStepBuilderWithSingleMandatoryAnnotatedField/Expected_GenerateStepBuilderWithSingleMandatoryAnnotatedFieldBuilder.java"))
 					.executeTest();
 		}
+
+		@Test
+		void setterWithCustomPrefix() {
+			Cute.blackBoxTest()
+					.given()
+					.processors(List.of(BuildableProcessor.class))
+					.andSourceFiles(
+							"/tests/Strategies/StepWise/SetterWithCustomPrefix/SetterWithCustomPrefix.java")
+					.whenCompiled()
+					.thenExpectThat()
+					.compilationSucceeds()
+					.andThat()
+					.generatedSourceFile(
+							"io.jonasg.bob.test.SetterWithCustomPrefixBuilder")
+					.matches(
+							CuteApi.ExpectedFileObjectMatcherKind.BINARY,
+							JavaFileObjectUtils.readFromResource(
+									"/tests/Strategies/StepWise/SetterWithCustomPrefix/Expected_SetterWithCustomPrefixBuilder.java"))
+					.andThat()
+					.generatedSourceFile(
+							"io.jonasg.bob.test.DefaultSetterWithCustomPrefixBuilder")
+					.matches(
+							CuteApi.ExpectedFileObjectMatcherKind.BINARY,
+							JavaFileObjectUtils.readFromResource(
+									"/tests/Strategies/StepWise/SetterWithCustomPrefix/Expected_DefaultSetterWithCustomPrefixBuilder.java"))
+					.executeTest();
+		}
 	}
 }

processor/src/test/resources/tests/Strategies/StepWise/SetterWithCustomPrefix/Expected_DefaultSetterWithCustomPrefixBuilder.java

@@ -0,0 +1,50 @@
+package io.jonasg.bob.test;
+
+import java.lang.String;
+
+public final class DefaultSetterWithCustomPrefixBuilder implements SetterWithCustomPrefixBuilder, SetterWithCustomPrefixBuilder.BuildStep, SetterWithCustomPrefixBuilder.FuelEfficiencyStep, SetterWithCustomPrefixBuilder.IsElectricStep {
+  private double engineSize;
+
+  private boolean isElectric;
+
+  private float fuelEfficiency;
+
+  private String make;
+
+  private int year;
+
+  public DefaultSetterWithCustomPrefixBuilder() {
+  }
+
+  public DefaultSetterWithCustomPrefixBuilder withEngineSize(double engineSize) {
+    this.engineSize = engineSize;
+    return this;
+  }
+
+  public DefaultSetterWithCustomPrefixBuilder withIsElectric(boolean isElectric) {
+    this.isElectric = isElectric;
+    return this;
+  }
+
+  public DefaultSetterWithCustomPrefixBuilder withFuelEfficiency(float fuelEfficiency) {
+    this.fuelEfficiency = fuelEfficiency;
+    return this;
+  }
+
+  public DefaultSetterWithCustomPrefixBuilder withMake(String make) {
+    this.make = make;
+    return this;
+  }
+
+  public DefaultSetterWithCustomPrefixBuilder withYear(int year) {
+    this.year = year;
+    return this;
+  }
+
+  public SetterWithCustomPrefix build() {
+    var instance = new SetterWithCustomPrefix(engineSize, isElectric, fuelEfficiency);
+    instance.setMake(this.make);
+    instance.setYear(this.year);
+    return instance;
+  }
+}

processor/src/test/resources/tests/Strategies/StepWise/SetterWithCustomPrefix/Expected_SetterWithCustomPrefixBuilder.java

@@ -0,0 +1,27 @@
+package io.jonasg.bob.test;
+
+import java.lang.String;
+
+public interface SetterWithCustomPrefixBuilder {
+  static SetterWithCustomPrefixBuilder newBuilder() {
+    return new DefaultSetterWithCustomPrefixBuilder();
+  }
+
+  IsElectricStep withEngineSize(double engineSize);
+
+  interface BuildStep {
+    BuildStep withYear(int year);
+
+    BuildStep withMake(String make);
+
+    SetterWithCustomPrefix build();
+  }
+
+  interface FuelEfficiencyStep {
+    BuildStep withFuelEfficiency(float fuelEfficiency);
+  }
+
+  interface IsElectricStep {
+    FuelEfficiencyStep withIsElectric(boolean isElectric);
+  }
+}

processor/src/test/resources/tests/Strategies/StepWise/SetterWithCustomPrefix/SetterWithCustomPrefix.java

@@ -0,0 +1,33 @@
+package io.jonasg.bob.test;
+
+import io.jonasg.bob.Buildable;
+import io.jonasg.bob.Strategy;
+
+@Buildable(strategy = Strategy.STEP_WISE, setterPrefix = "with")
+public class SetterWithCustomPrefix {
+	private String make;
+
+	private int year;
+
+	private double engineSize;
+
+	private boolean isElectric;
+
+	private float fuelEfficiency;
+
+	public SetterWithCustomPrefix(double engineSize, boolean isElectric, float fuelEfficiency) {
+		this.engineSize = engineSize;
+		this.isElectric = isElectric;
+		this.fuelEfficiency = fuelEfficiency;
+	}
+
+	public SetterWithCustomPrefix setMake(String make) {
+		this.make = make;
+		return this;
+	}
+
+	public SetterWithCustomPrefix setYear(int year) {
+		this.year = year;
+		return this;
+	}
+}