Add JSON schema validation example bundle

com.vogella.adapters/META-INF/MANIFEST.MF

@@ -15,5 +15,5 @@ Require-Bundle: org.eclipse.core.runtime,
  org.eclipse.core.resources,
  org.eclipse.e4.ui.workbench
 Bundle-RequiredExecutionEnvironment: JavaSE-25
-Import-Package: jakarta.annotation;version="[2.1.0,3.0.0)"
+Import-Package: jakarta.annotation;version="[2.1.0,4.0.0)"
 Automatic-Module-Name: com.vogella.adapters

com.vogella.contribute.parts/META-INF/MANIFEST.MF

@@ -18,6 +18,6 @@ Require-Bundle: org.eclipse.core.runtime,
  org.eclipse.ui.workbench;bundle-version="3.134.0",
  org.eclipse.e4.core.contexts
 Bundle-RequiredExecutionEnvironment: JavaSE-25
-Import-Package: jakarta.annotation;version="[2.1.0,3.0.0)",
+Import-Package: jakarta.annotation;version="[2.1.0,4.0.0)",
  jakarta.inject;version="[2.0.0,3.0.0)"
 Automatic-Module-Name: com.vogella.contribute.parts

com.vogella.ide.first/META-INF/MANIFEST.MF

@@ -12,6 +12,6 @@ Require-Bundle: org.eclipse.osgi,
  org.eclipse.e4.core.di.annotations
 Bundle-RequiredExecutionEnvironment: JavaSE-25
 Import-Package: com.vogella.tasks.model,
- jakarta.annotation;version="[2.1.0,3.0.0)",
+ jakarta.annotation;version="[2.1.0,4.0.0)",
  jakarta.inject;version="[2.0.0,3.0.0)"
 Automatic-Module-Name: com.vogella.ide.first

com.vogella.json.validation.tests/.classpath

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-25"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

com.vogella.json.validation.tests/.project

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>com.vogella.json.validation.tests</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

com.vogella.json.validation.tests/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=25
+org.eclipse.jdt.core.compiler.compliance=25
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=25

com.vogella.json.validation.tests/META-INF/MANIFEST.MF

@@ -0,0 +1,10 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: JSON Schema Validation Example Tests
+Bundle-SymbolicName: com.vogella.json.validation.tests
+Bundle-Version: 1.0.0.qualifier
+Bundle-Vendor: VOGELLA
+Fragment-Host: com.vogella.json.validation;bundle-version="1.0.0"
+Require-Bundle: junit-jupiter-api;bundle-version="5.11.0"
+Automatic-Module-Name: com.vogella.json.validation.tests
+Bundle-RequiredExecutionEnvironment: JavaSE-25

com.vogella.json.validation.tests/build.properties

@@ -0,0 +1,4 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .

com.vogella.json.validation.tests/pom.xml

@@ -0,0 +1,17 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>com.vogella.tycho</groupId>
+		<artifactId>releng</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+
+	<groupId>com.vogella.json</groupId>
+	<artifactId>com.vogella.json.validation.tests</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<packaging>eclipse-test-plugin</packaging>
+
+</project>

com.vogella.json.validation.tests/src/com/vogella/json/validation/tests/JsonSchemaValidationExampleTest.java

@@ -0,0 +1,55 @@
+package com.vogella.json.validation.tests;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Set;
+
+import org.junit.jupiter.api.Test;
+
+import com.networknt.schema.ValidationMessage;
+import com.vogella.json.validation.JsonSchemaValidationExample;
+
+class JsonSchemaValidationExampleTest {
+
+	private final JsonSchemaValidationExample example = new JsonSchemaValidationExample();
+
+	@Test
+	void validDocumentHasNoErrors() throws Exception {
+		try (InputStream schema = schema(); InputStream data = resource("data.json")) {
+			Set<ValidationMessage> errors = example.validate(schema, data);
+			assertTrue(errors.isEmpty(), () -> "Expected no errors but got: " + errors);
+		}
+	}
+
+	@Test
+	void invalidDocumentReportsErrors() throws Exception {
+		// Missing required "name", negative "age", and an undeclared property.
+		String invalid = """
+				{
+				  "age": -1,
+				  "unexpected": true
+				}
+				""";
+		try (InputStream schema = schema();
+				InputStream data = new ByteArrayInputStream(invalid.getBytes(StandardCharsets.UTF_8))) {
+			Set<ValidationMessage> errors = example.validate(schema, data);
+			assertFalse(errors.isEmpty(), "Expected validation errors for an invalid document");
+		}
+	}
+
+	private static InputStream schema() {
+		return resource("schema.json");
+	}
+
+	private static InputStream resource(String name) {
+		InputStream in = JsonSchemaValidationExample.class.getResourceAsStream(name);
+		if (in == null) {
+			throw new IllegalStateException("Missing classpath resource: " + name);
+		}
+		return in;
+	}
+}

com.vogella.json.validation/.classpath

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-25"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

com.vogella.json.validation/.project

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>com.vogella.json.validation</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

com.vogella.json.validation/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=25
+org.eclipse.jdt.core.compiler.compliance=25
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=25

com.vogella.json.validation/META-INF/MANIFEST.MF

@@ -0,0 +1,11 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: JSON Schema Validation Example
+Bundle-SymbolicName: com.vogella.json.validation
+Bundle-Version: 1.0.0.qualifier
+Bundle-Vendor: VOGELLA
+Automatic-Module-Name: com.vogella.json.validation
+Bundle-RequiredExecutionEnvironment: JavaSE-25
+Export-Package: com.vogella.json.validation
+Require-Bundle: com.networknt.json-schema-validator;bundle-version="1.5.6",
+ com.fasterxml.jackson.core.jackson-databind;bundle-version="[2.18.0,3.0.0)"

com.vogella.json.validation/build.properties

@@ -0,0 +1,4 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .

com.vogella.json.validation/src/com/vogella/json/validation/JsonSchemaValidationExample.java

@@ -0,0 +1,64 @@
+package com.vogella.json.validation;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.util.Set;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.networknt.schema.JsonSchema;
+import com.networknt.schema.JsonSchemaFactory;
+import com.networknt.schema.SpecVersion;
+import com.networknt.schema.ValidationMessage;
+
+/**
+ * Validates a JSON document against a JSON Schema (Draft 2020-12) using
+ * networknt/json-schema-validator.
+ */
+public class JsonSchemaValidationExample {
+
+	private static final ObjectMapper MAPPER = new ObjectMapper();
+	private static final JsonSchemaFactory FACTORY = JsonSchemaFactory
+			.getInstance(SpecVersion.VersionFlag.V202012);
+
+	/**
+	 * Validates the JSON read from {@code data} against the schema read from
+	 * {@code schema}.
+	 *
+	 * @return the validation errors, empty if the document is valid
+	 */
+	public Set<ValidationMessage> validate(InputStream schema, InputStream data) {
+		try {
+			JsonSchema jsonSchema = FACTORY.getSchema(schema);
+			JsonNode node = MAPPER.readTree(data);
+			return jsonSchema.validate(node);
+		} catch (IOException e) {
+			throw new UncheckedIOException("Could not read JSON schema or data", e);
+		}
+	}
+
+	public static void main(String[] args) {
+		JsonSchemaValidationExample example = new JsonSchemaValidationExample();
+		try (InputStream schema = resource("schema.json");
+				InputStream data = resource("data.json")) {
+			Set<ValidationMessage> errors = example.validate(schema, data);
+			if (errors.isEmpty()) {
+				System.out.println("data.json is valid against schema.json");
+			} else {
+				System.out.println("data.json is invalid:");
+				errors.forEach(error -> System.out.println("  " + error.getMessage()));
+			}
+		} catch (IOException e) {
+			throw new UncheckedIOException(e);
+		}
+	}
+
+	private static InputStream resource(String name) {
+		InputStream in = JsonSchemaValidationExample.class.getResourceAsStream(name);
+		if (in == null) {
+			throw new IllegalStateException("Missing classpath resource: " + name);
+		}
+		return in;
+	}
+}

com.vogella.json.validation/src/com/vogella/json/validation/data.json

@@ -0,0 +1,5 @@
+{
+  "name": "Alice",
+  "age": 30,
+  "email": "alice@example.com"
+}

com.vogella.json.validation/src/com/vogella/json/validation/schema.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "Person",
+  "type": "object",
+  "properties": {
+    "name": { "type": "string" },
+    "age": { "type": "integer", "minimum": 0 },
+    "email": { "type": "string", "format": "email" }
+  },
+  "required": ["name", "age"],
+  "additionalProperties": false
+}

com.vogella.tasks.ui/META-INF/MANIFEST.MF

@@ -24,7 +24,7 @@ Require-Bundle: org.eclipse.core.runtime,
 Bundle-RequiredExecutionEnvironment: JavaSE-25
 Import-Package: com.vogella.tasks.events,
  com.vogella.tasks.model,
- jakarta.annotation;version="[2.1.0,3.0.0)",
+ jakarta.annotation;version="[2.1.0,4.0.0)",
  jakarta.inject;version="[2.0.0,3.0.0)"
 Automatic-Module-Name: com.vogella.tasks.ui
 Bundle-ActivationPolicy: lazy

pom.xml

@@ -140,8 +140,10 @@
     <module>z.ex.search</module>
     <module>com.vogella.ide.iconreplacer</module>
     <module>com.vogella.ide.parallelstart</module>
+    <module>com.vogella.json.validation</module>
 
     <!--Tests-->
+    <module>com.vogella.json.validation.tests</module>
     <!--
 
     <module>com.vogella.tasks.services.tests</module>

target-platform/target-platform.target

@@ -29,6 +29,12 @@
 					<version>2.11.0</version>
 					<type>jar</type>
 				</dependency>
+				<dependency>
+					<groupId>com.networknt</groupId>
+					<artifactId>json-schema-validator</artifactId>
+					<version>1.5.6</version>
+					<type>jar</type>
+				</dependency>
 			</dependencies>
 		</location>
 	</locations>