KT-24025: Support constants in as java mode

 #KT-24025 fixed

1 files changed, 20 insertions, 1 deletions

diff --git a/core/src/main/kotlin/Java/JavaPsiDocumentationBuilder.kt b/core/src/main/kotlin/Java/JavaPsiDocumentationBuilder.kt
index 6d5825e9..9eabc227 100644
--- a/core/src/main/kotlin/Java/JavaPsiDocumentationBuilder.kt
+++ b/core/src/main/kotlin/Java/JavaPsiDocumentationBuilder.kt
@@ -1,7 +1,9 @@
 package org.jetbrains.dokka
 
 import com.google.inject.Inject
+import com.intellij.openapi.util.text.StringUtil
 import com.intellij.psi.*
+import com.intellij.psi.impl.JavaConstantExpressionEvaluator
 import com.intellij.psi.util.InheritanceUtil
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.asJava.elements.KtLightDeclaration
@@ -207,11 +209,28 @@ class JavaPsiDocumentationBuilder : JavaDocumentationBuilder {
     fun PsiField.build(): DocumentationNode {
         val node = nodeForElement(this, nodeKind())
         node.appendType(type)
-        node.appendModifiers(this)
+
+        node.appendConstantValueIfAny(this)
         register(this, node)
         return node
     }
 
+    private fun DocumentationNode.appendConstantValueIfAny(field: PsiField) {
+        val modifierList = field.modifierList ?: return
+        val initializer = field.initializer ?: return
+        if (field.type is PsiPrimitiveType &&
+            modifierList.hasExplicitModifier(PsiModifier.FINAL) &&
+            modifierList.hasExplicitModifier(PsiModifier.STATIC)) {
+            val value = JavaConstantExpressionEvaluator.computeConstantExpression(initializer, false)
+            val text = when(value) {
+                is String ->
+                    "\"" + StringUtil.escapeStringCharacters(value) + "\""
+                else -> value.toString()
+            }
+            append(DocumentationNode(text, Content.Empty, NodeKind.Value), RefKind.Detail)
+        }
+    }
+
     private fun PsiField.nodeKind(): NodeKind = when {
         this is PsiEnumConstant -> NodeKind.EnumItem
         else -> NodeKind.Field