#2433: EOint has hashcode even without delta attribute initialized

eo-maven-plugin/src/main/resources/org/eolang/maven/pre/to-java.xsl

@@ -131,6 +131,8 @@ SOFTWARE.
         <xsl:apply-templates select="//meta[head='package']" mode="head"/>
         <xsl:text>import org.eolang.*;</xsl:text>
         <xsl:value-of select="eo:eol(0)"/>
+        <xsl:text>import java.util.concurrent.atomic.AtomicBoolean;</xsl:text>
+        <xsl:value-of select="eo:eol(0)"/>
         <xsl:apply-templates select="//meta[head='junit' or head='tests']" mode="head"/>
         <xsl:apply-templates select="." mode="body"/>
       </xsl:element>
@@ -158,6 +160,7 @@ SOFTWARE.
     <xsl:value-of select="eo:class-name(@name, eo:suffix(@line, @pos))"/>
     <xsl:text> extends PhDefault {</xsl:text>
     <xsl:value-of select="eo:eol(0)"/>
+    <xsl:apply-templates select="." mode="fields"/>
     <xsl:apply-templates select="." mode="ctors"/>
     <xsl:apply-templates select="." mode="equals-and-hashCode"/>
     <xsl:if test="//meta[head='junit' or head='tests'] and not(@parent)">
@@ -174,8 +177,17 @@ SOFTWARE.
       <xsl:value-of select="."/>
     </xsl:for-each>
   </xsl:template>
+  <xsl:template match="class" mode="fields">
+    <xsl:value-of select="eo:tabs(1)"/>
+    <xsl:variable name="type" select="concat(//meta[head='package']/tail, '.', @name)"/>
+    <xsl:if test="$literal-objects[text()=$type]">
+      <xsl:value-of select="eo:eol(1)"/>
+      <xsl:text>private final AtomicBoolean initialized = new AtomicBoolean(false);</xsl:text>
+    </xsl:if>
+  </xsl:template>
   <xsl:template match="class" mode="ctors">
     <xsl:value-of select="eo:tabs(1)"/>
+    <xsl:value-of select="eo:eol(1)"/>
     <xsl:choose>
       <xsl:when test="//meta[head='junit' or head='tests'] and not(@parent)">
         <xsl:text>public </xsl:text>
@@ -223,14 +235,24 @@ SOFTWARE.
       <xsl:text>@Override</xsl:text>
       <xsl:value-of select="eo:eol(1)"/>
       <xsl:text>public int hashCode() {</xsl:text>
-      <xsl:value-of select="eo:eol(2)"/>
-      <xsl:text>if (this.initialized.get()) {</xsl:text>
-      <xsl:value-of select="eo:eol(3)"/>
-      <xsl:text>return this.attr("Δ").get().hashCode();</xsl:text>
-      <xsl:value-of select="eo:eol(2)"/>
-      <xsl:text>} else {</xsl:text>
-      <xsl:value-of select="eo:eol(3)"/>
-      <xsl:text>return this.attr("Δ").get().hashCode();</xsl:text>
+      <xsl:choose>
+        <xsl:when test="$type='org.eolang.tuple'">
+          <xsl:value-of select="eo:eol(1)"/>
+          <xsl:text>return this.attr("Δ").get().hashCode();</xsl:text>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:value-of select="eo:eol(2)"/>
+          <xsl:text>if (this.initialized.get()) {</xsl:text>
+          <xsl:value-of select="eo:eol(3)"/>
+          <xsl:text>return this.attr("Δ").get().hashCode();</xsl:text>
+          <xsl:value-of select="eo:eol(2)"/>
+          <xsl:text>} else {</xsl:text>
+          <xsl:value-of select="eo:eol(3)"/>
+          <xsl:text>return this.vertex;</xsl:text>
+          <xsl:value-of select="eo:eol(2)"/>
+          <xsl:text>}</xsl:text>
+        </xsl:otherwise>
+      </xsl:choose>
       <xsl:value-of select="eo:eol(1)"/>
       <xsl:text>}</xsl:text>
       <xsl:value-of select="eo:eol(1)"/>

eo-runtime/src/test/java/EOorg/EOeolang/EOintTest.java

@@ -0,0 +1,62 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2023 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * @checkstyle PackageNameCheck (10 lines)
+ */
+package EOorg.EOeolang;
+
+import org.eolang.Data;
+import org.eolang.Phi;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test case for {@link EOint}.
+ *
+ * @since 0.1
+ * @checkstyle TypeNameCheck (4 lines)
+ */
+public class EOintTest {
+
+    @Test
+    void hasEqualHashes() {
+        final Phi left = new Data.ToPhi(42L);
+        final Phi right = new Data.ToPhi(42L);
+        MatcherAssert.assertThat(
+            left.hashCode(),
+            Matchers.equalTo(right.hashCode())
+        );
+    }
+
+    @Test
+    void hasHashEvenWithoutData() {
+        final Phi phi = new EOint(Phi.Φ);
+        MatcherAssert.assertThat(
+            phi.hashCode(),
+            Matchers.greaterThan(0)
+        );
+    }
+}