Add GenerationConfig option to exclude Object Header from toString()

jsonschema2pojo-ant/src/main/java/org/jsonschema2pojo/ant/Jsonschema2PojoTask.java

@@ -103,6 +103,8 @@ public class Jsonschema2PojoTask extends Task implements GenerationConfig {
 
     private String[] toStringExcludes = new String[] {};
 
+    private boolean excludeObjectHeaderFromToString = false;
+
     private AnnotationStyle annotationStyle = AnnotationStyle.JACKSON;
 
     private boolean useTitleAsClassname = false;
@@ -196,6 +198,7 @@ public class Jsonschema2PojoTask extends Task implements GenerationConfig {
     private boolean includeGeneratedAnnotation = true;
 
     private boolean useJakartaValidation = false;
+
     /**
      * Execute this task (it's expected that all relevant setters will have been
      * called by Ant to provide task configuration <em>before</em> this method
@@ -517,6 +520,17 @@ public void setIncludeToString(boolean includeToString) {
         this.includeToString = includeToString;
     }
 
+    /**
+     * Sets the 'excludeObjectHeaderFromToString' property of this class
+     *
+     * @param excludeObjectHeaderFromToString
+     *            Whether to exclude the object header from the <code>toString</code> method in generated
+     *            Java types.
+     */
+    public void setExcludeObjectHeaderFromToString(boolean excludeObjectHeaderFromToString) {
+        this.excludeObjectHeaderFromToString = excludeObjectHeaderFromToString;
+    }
+
     /**
      * Sets the 'annotationStyle' property of this class
      *
@@ -1056,6 +1070,11 @@ public String[] getToStringExcludes() {
         return toStringExcludes;
     }
 
+    @Override
+    public boolean isExcludeObjectHeaderFromToString() {
+        return excludeObjectHeaderFromToString;
+    }
+
     @Override
     public AnnotationStyle getAnnotationStyle() {
         return annotationStyle;

jsonschema2pojo-ant/src/site/Jsonschema2PojoTask.html

@@ -350,6 +350,11 @@ <h3>Parameters</h3>
     <td valign="top">A string containing fields to be excluded from toString generation.</td>
     <td align="center" valign="top">No (default <code>""</code> (none))</td>
   </tr>
+  <tr>
+    <td valign="top">excludeObjectHeaderFromToString</td>
+    <td valign="top">Whether to exclude the object header from the generated toString() methods.</td>
+    <td align="center" valign="top">No (default <code>"false"</code> (none))</td>
+  </tr>
   <tr>
     <td valign="top">initializeCollections</td>
     <td valign="top">Whether to initialize Set and List fields as empty collections, or leave them

jsonschema2pojo-cli/src/main/java/org/jsonschema2pojo/cli/Arguments.java

@@ -116,6 +116,9 @@ public class Arguments implements GenerationConfig {
     @Parameter(names = { "-tse", "--tostring-excludes" }, description = "The fields that should be excluded from generated toString methods")
     private String toStringExcludes = "";
 
+    @Parameter(names = { "-tso", "--exclude-object-header-from-tostring" }, description = "Exclude the object header from generated toString methods")
+    private boolean excludeObjectHeaderFromToString = false;
+
     @Parameter(names = { "-a", "--annotation-style" })
     private AnnotationStyle annotationStyle = AnnotationStyle.JACKSON;
 
@@ -368,7 +371,12 @@ public boolean isIncludeToString() {
     public String[] getToStringExcludes() {
         return defaultString(toStringExcludes).split(" ");
     }
-
+
+    @Override
+    public boolean isExcludeObjectHeaderFromToString() {
+        return excludeObjectHeaderFromToString;
+    }
+
     @Override
     public AnnotationStyle getAnnotationStyle() {
         return annotationStyle;

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/DefaultGenerationConfig.java

@@ -129,6 +129,14 @@ public String[] getToStringExcludes() {
         return new String[] {};
     }
 
+    /**
+     * @return {@code false}
+     */
+    @Override
+    public boolean isExcludeObjectHeaderFromToString() {
+        return false;
+    }
+
     /**
      * @return {@code false}
      */

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/GenerationConfig.java

@@ -166,6 +166,13 @@ public interface GenerationConfig {
    */
   String[] getToStringExcludes();
 
+  /**
+   * Gets the 'excludeObjectHeaderFromToString' configuration option.
+   *
+   * @return Whether to exclude the object header from the toString implementations of the generated Java types
+   */
+  boolean isExcludeObjectHeaderFromToString();
+
   /**
    * Gets the 'annotationStyle' configuration option.
    *

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/rules/ObjectRule.java

@@ -274,14 +274,18 @@ private void addToString(JDefinedClass jclass) {
         JClass stringBuilderClass = jclass.owner().ref(StringBuilder.class);
         JVar sb = body.decl(stringBuilderClass, "sb", JExpr._new(stringBuilderClass));
 
-        // Write the header, e.g.: example.domain.MyClass@85e382a7[
-        body.add(sb
-                .invoke("append").arg(jclass.dotclass().invoke("getName"))
-                .invoke("append").arg(JExpr.lit('@'))
-                .invoke("append").arg(
-                        jclass.owner().ref(Integer.class).staticInvoke("toHexString").arg(
-                                jclass.owner().ref(System.class).staticInvoke("identityHashCode").arg(JExpr._this())))
-                .invoke("append").arg(JExpr.lit('[')));
+        if (ruleFactory.getGenerationConfig().isExcludeObjectHeaderFromToString()) {
+            body.add(sb.invoke("append").arg(JExpr.lit('[')));
+        } else {
+            // Write the header, e.g.: example.domain.MyClass@85e382a7[
+            body.add(sb
+                    .invoke("append").arg(jclass.dotclass().invoke("getName"))
+                    .invoke("append").arg(JExpr.lit('@'))
+                    .invoke("append").arg(
+                            jclass.owner().ref(Integer.class).staticInvoke("toHexString").arg(
+                                    jclass.owner().ref(System.class).staticInvoke("identityHashCode").arg(JExpr._this())))
+                    .invoke("append").arg(JExpr.lit('[')));
+        }
 
         // If this has a parent class, include its toString()
         if (!jclass._extends().fullName().equals(Object.class.getName())) {

jsonschema2pojo-gradle-plugin/README.md

@@ -296,6 +296,9 @@ jsonSchema2Pojo {
 
   // properties to exclude from generated toString
   toStringExcludes = ["someProperty"]
+
+  // Whether to exclude the object header from the toString method
+  excludeObjectHeaderFromToString = false
 
     // What Java version to target with generated source code (1.6, 1.8, 9, 11, etc).
     // By default, the version will be taken from the Gradle Java plugin's 'sourceCompatibility',

jsonschema2pojo-gradle-plugin/src/main/groovy/org/jsonschema2pojo/gradle/JsonSchemaExtension.groovy

@@ -66,6 +66,7 @@ public class JsonSchemaExtension implements GenerationConfig {
   boolean useOptionalForGetters
   boolean includeToString
   String[] toStringExcludes
+  boolean excludeObjectHeaderFromToString
   boolean initializeCollections
   String outputEncoding
   boolean parcelable
@@ -119,6 +120,7 @@ public class JsonSchemaExtension implements GenerationConfig {
     includeAllPropertiesConstructor = true
     includeToString = true
     toStringExcludes = [] as String[]
+    excludeObjectHeaderFromToString = false
     annotationStyle = AnnotationStyle.JACKSON
     useTitleAsClassname = false
     inclusionLevel = InclusionLevel.NON_NULL
@@ -249,6 +251,7 @@ public class JsonSchemaExtension implements GenerationConfig {
        |includeCopyConstructor = ${includeCopyConstructor}
        |includeToString = ${includeToString}
        |toStringExcludes = ${Arrays.toString(toStringExcludes)}
+       |excludeObjectHeaderFromToString = ${excludeObjectHeaderFromToString}
        |annotationStyle = ${annotationStyle.toString().toLowerCase()}
        |useTitleAsClassname = ${useTitleAsClassname}
        |inclusionLevel = ${InclusionLevel.toString() }

jsonschema2pojo-integration-tests/src/test/java/org/jsonschema2pojo/integration/config/ExcludeToStringObjectHeaderIT.java

@@ -0,0 +1,64 @@
+/**
+ * Copyright © 2010-2020 Nokia
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jsonschema2pojo.integration.config;
+
+import org.jsonschema2pojo.integration.util.Jsonschema2PojoRule;
+import org.junit.Rule;
+import org.junit.Test;
+
+import java.lang.reflect.Method;
+import java.util.Map;
+
+import static org.jsonschema2pojo.integration.util.CodeGenerationHelper.config;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class ExcludeToStringObjectHeaderIT {
+
+    @Rule
+    public Jsonschema2PojoRule schemaRule = new Jsonschema2PojoRule();
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    private void testConfig(Map<String, Object> config, String expectedResultTemplate) throws ClassNotFoundException, SecurityException, NoSuchMethodException {
+        ClassLoader resultsClassLoader = schemaRule.generateAndCompile("/schema/properties/primitiveProperties.json", "com.example", config);
+
+        Class generatedType = resultsClassLoader.loadClass("com.example.PrimitiveProperties");
+
+        // throws NoSuchMethodException if method is not found
+        Method toString = generatedType.getDeclaredMethod("toString");
+        try {
+            Object primitiveProperties = generatedType.newInstance();
+            Object result = toString.invoke(primitiveProperties);
+            assertEquals(String.format(expectedResultTemplate, Integer.toHexString(System.identityHashCode(primitiveProperties))), result);
+        } catch (Exception e) {
+            fail("Unable to invoke toString method: " + e.getMessage());
+        }
+    }
+
+    @Test
+    public void beansExcludeObjectHeaderFromToString() throws ClassNotFoundException, SecurityException, NoSuchMethodException {
+        testConfig(config("excludeObjectHeaderFromToString", true),
+                "[a=<null>,b=<null>,c=<null>,additionalProperties={}]");
+    }
+
+    @Test
+    public void beansExcludeObjectHeaderFromToStringWithExcludes() throws ClassNotFoundException, SecurityException, NoSuchMethodException {
+        testConfig(config("excludeObjectHeaderFromToString", true, "toStringExcludes", new String[]{"b", "c"}),
+                "[a=<null>,additionalProperties={}]");
+    }
+
+}

jsonschema2pojo-maven-plugin/src/main/java/org/jsonschema2pojo/maven/Jsonschema2PojoMojo.java

@@ -235,6 +235,14 @@ public class Jsonschema2PojoMojo extends AbstractMojo implements GenerationConfi
     @Parameter(property = "jsonschema2pojo.toStringExcludes", defaultValue = "")
     private String[] toStringExcludes = new String[] {};
 
+    /**
+     * Whether to include the object header in the generated toString implementation
+     *
+     * @since 1.2.1
+     */
+    @Parameter(property = "jsonschema2pojo.excludeObjectHeaderFromToString", defaultValue = "false")
+    private boolean excludeObjectHeaderFromToString = false;
+
     /**
      * The style of annotations to use in the generated Java types.
      * <p>
@@ -949,6 +957,9 @@ public String[] getToStringExcludes() {
         return toStringExcludes;
     }
 
+    @Override
+    public boolean isExcludeObjectHeaderFromToString() { return excludeObjectHeaderFromToString; }
+
     @Override
     public AnnotationStyle getAnnotationStyle() {
         return AnnotationStyle.valueOf(annotationStyle.toUpperCase());