Use getters and setters in java code generation #2534 (#2537)

Author: EgorkaKulikov

utbot-framework/src/main/kotlin/org/utbot/framework/codegen/tree/CgMethodConstructor.kt

@@ -64,9 +64,11 @@ import org.utbot.framework.codegen.tree.CgComponents.getStatementConstructorBy
 import org.utbot.framework.codegen.tree.CgComponents.getTestFrameworkManagerBy
 import org.utbot.framework.codegen.tree.CgComponents.getVariableConstructorBy
 import org.utbot.framework.codegen.util.canBeReadFrom
+import org.utbot.framework.codegen.util.canBeReadViaGetterFrom
 import org.utbot.framework.codegen.util.canBeSetFrom
 import org.utbot.framework.codegen.util.equalTo
 import org.utbot.framework.codegen.util.escapeControlChars
+import org.utbot.framework.codegen.util.getter
 import org.utbot.framework.codegen.util.inc
 import org.utbot.framework.codegen.util.length
 import org.utbot.framework.codegen.util.lessThan
@@ -1154,6 +1156,10 @@ open class CgMethodConstructor(val context: CgContext) : CgContextOwner by conte
         // and is accessible from current package
         if (variable.type.hasField(this) && canBeReadFrom(context, variable.type)) {
             if (jField.isStatic) CgStaticFieldAccess(this) else CgFieldAccess(variable, this)
+        } else if (context.codegenLanguage == CodegenLanguage.JAVA &&
+            !jField.isStatic && canBeReadViaGetterFrom(context)
+        ) {
+            CgMethodCall(variable, getter, emptyList())
         } else {
             utilsClassId[getFieldValue](variable, this.declaringClass.name, this.name)
         }

utbot-framework/src/main/kotlin/org/utbot/framework/codegen/tree/CgVariableConstructor.kt

@@ -14,13 +14,15 @@ import org.utbot.framework.codegen.tree.CgComponents.getNameGeneratorBy
 import org.utbot.framework.codegen.tree.CgComponents.getStatementConstructorBy
 import org.utbot.framework.codegen.util.at
 import org.utbot.framework.codegen.util.canBeSetFrom
+import org.utbot.framework.codegen.util.canBeSetViaSetterFrom
 import org.utbot.framework.codegen.util.fieldThatIsGotWith
 import org.utbot.framework.codegen.util.fieldThatIsSetWith
 import org.utbot.framework.codegen.util.inc
 import org.utbot.framework.codegen.util.isAccessibleFrom
 import org.utbot.framework.codegen.util.lessThan
 import org.utbot.framework.codegen.util.nullLiteral
 import org.utbot.framework.codegen.util.resolve
+import org.utbot.framework.codegen.util.setter
 import org.utbot.framework.plugin.api.BuiltinClassId
 import org.utbot.framework.plugin.api.ClassId
 import org.utbot.framework.plugin.api.FieldId
@@ -209,6 +211,10 @@ open class CgVariableConstructor(val context: CgContext) :
             // TODO: check if it is correct to use declaringClass of a field here
             val fieldAccess = if (field.isStatic) CgStaticFieldAccess(fieldId) else CgFieldAccess(obj, fieldId)
             fieldAccess `=` valueForField
+        } else if (context.codegenLanguage == CodegenLanguage.JAVA &&
+            !field.isStatic && fieldId.canBeSetViaSetterFrom(context)
+        ) {
+            +CgMethodCall(obj, fieldId.setter, listOf(valueForField))
         } else {
             // composite models must not have info about static fields, hence only non-static fields are set here
             +utilsClassId[setField](obj, fieldId.declaringClass.name, fieldId.name, valueForField)

utbot-framework/src/main/kotlin/org/utbot/framework/codegen/util/FieldIdUtil.kt

@@ -36,7 +36,7 @@ fun FieldId.isAccessibleFrom(packageName: String, callerClassId: ClassId): Boole
     return isClassAccessible && isAccessibleFromPackageByModifiers
 }
 
-private fun FieldId.canBeReadViaGetterFrom(context: CgContext): Boolean =
+internal fun FieldId.canBeReadViaGetterFrom(context: CgContext): Boolean =
     declaringClass.allMethods.contains(getter) && getter.isAccessibleFrom(context.testClassPackageName)
 
 /**
@@ -52,7 +52,7 @@ internal fun FieldId.canBeReadFrom(context: CgContext, callerClassId: ClassId):
     return isAccessibleFrom(context.testClassPackageName, callerClassId)
 }
 
-private fun FieldId.canBeSetViaSetterFrom(context: CgContext): Boolean =
+internal fun FieldId.canBeSetViaSetterFrom(context: CgContext): Boolean =
     declaringClass.allMethods.contains(setter) && setter.isAccessibleFrom(context.testClassPackageName)
 
 /**