diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index 5373b99e934ddf7292f3878889c63e13548b5794..639f8448c3f2d332e2b0dd5245cf1edbee9e59e0 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -19,7 +19,11 @@ package org.openapitools.codegen;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.google.common.base.CaseFormat;
+import com.google.common.collect.ImmutableMap;
+import com.samskivert.mustache.Mustache;
import com.samskivert.mustache.Mustache.Compiler;
+import com.samskivert.mustache.Mustache.Lambda;
+
import io.swagger.v3.core.util.Json;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.Operation;
@@ -48,6 +52,11 @@ import org.openapitools.codegen.meta.GeneratorMetadata;
import org.openapitools.codegen.meta.Stability;
import org.openapitools.codegen.serializer.SerializerUtils;
import org.openapitools.codegen.templating.MustacheEngineAdapter;
+import org.openapitools.codegen.templating.mustache.CamelCaseLambda;
+import org.openapitools.codegen.templating.mustache.IndentedLambda;
+import org.openapitools.codegen.templating.mustache.LowercaseLambda;
+import org.openapitools.codegen.templating.mustache.TitlecaseLambda;
+import org.openapitools.codegen.templating.mustache.UppercaseLambda;
import org.openapitools.codegen.utils.ModelUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -199,6 +208,47 @@ public class DefaultCodegen implements CodegenConfig {
}
}
+ /***
+ * Preset map builder with commonly used Mustache lambdas.
+ *
+ * To extend the map, override addMustacheLambdas(), call parent method
+ * first and then add additional lambdas to the returned builder.
+ *
+ * If common lambdas are not desired, override addMustacheLambdas() method
+ * and return empty builder.
+ *
+ * @return preinitialized map builder with common lambdas
+ */
+ protected ImmutableMap.Builder<String, Lambda> addMustacheLambdas() {
+
+ return new ImmutableMap.Builder<String, Mustache.Lambda>()
+ .put("lowercase", new LowercaseLambda().generator(this))
+ .put("uppercase", new UppercaseLambda())
+ .put("titlecase", new TitlecaseLambda())
+ .put("camelcase", new CamelCaseLambda().generator(this))
+ .put("indented", new IndentedLambda())
+ .put("indented_8", new IndentedLambda(8, " "))
+ .put("indented_12", new IndentedLambda(12, " "))
+ .put("indented_16", new IndentedLambda(16, " "));
+ }
+
+ private void registerMustacheLambdas() {
+ ImmutableMap<String, Lambda> lambdas = addMustacheLambdas().build();
+
+ if (lambdas.size() == 0) {
+ return;
+ }
+
+ if (additionalProperties.containsKey("lambda")) {
+ LOGGER.warn("A property named 'lambda' already exists. Mustache lambdas renamed from 'lambda' to '_lambda'. " +
+ "You'll likely need to use a custom template, " +
+ "see https://github.com/OpenAPITools/openapi-generator/blob/master/docs/templating.md. ");
+ additionalProperties.put("_lambda", lambdas);
+ } else {
+ additionalProperties.put("lambda", lambdas);
+ }
+ }
+
// override with any special post-processing for all models
@SuppressWarnings({"static-method", "unchecked"})
public Map<String, Object> postProcessAllModels(Map<String, Object> objs) {
@@ -1060,6 +1110,9 @@ public class DefaultCodegen implements CodegenConfig {
// initialize special character mapping
initalizeSpecialCharacterMapping();
+
+ // Register common Mustache lambdas.
+ registerMustacheLambdas();
}
/**
@@ -1523,7 +1576,7 @@ public class DefaultCodegen implements CodegenConfig {
// If the format matches a typeMapping (supplied with the --typeMappings flag)
// then treat the format as a primitive type.
// This allows the typeMapping flag to add a new custom type which can then
- // be used in the format field.
+ // be used in the format field.
return schema.getFormat();
}
return "string";
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java
index 1e7a454007f87c69441332e97267f0097426f8a1..d39c6c07ab47aae6caae6c6b35b51b8781e7ec4d 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java
@@ -17,8 +17,9 @@
package org.openapitools.codegen.languages;
-import com.google.common.collect.ImmutableMap;
-import com.samskivert.mustache.Mustache;
+import com.google.common.collect.ImmutableMap.Builder;
+import com.samskivert.mustache.Mustache.Lambda;
+
import io.swagger.v3.core.util.Json;
import io.swagger.v3.oas.models.media.ArraySchema;
import io.swagger.v3.oas.models.media.Schema;
@@ -359,32 +360,12 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
// This either updates additionalProperties with the above fixes, or sets the default if the option was not specified.
additionalProperties.put(CodegenConstants.INTERFACE_PREFIX, interfacePrefix);
-
- addMustacheLambdas(additionalProperties);
}
- private void addMustacheLambdas(Map<String, Object> objs) {
-
- Map<String, Mustache.Lambda> lambdas = new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("lowercase", new LowercaseLambda().generator(this))
- .put("uppercase", new UppercaseLambda())
- .put("titlecase", new TitlecaseLambda())
- .put("camelcase", new CamelCaseLambda().generator(this))
- .put("camelcase_param", new CamelCaseLambda().generator(this).escapeAsParamName(true))
- .put("indented", new IndentedLambda())
- .put("indented_8", new IndentedLambda(8, " "))
- .put("indented_12", new IndentedLambda(12, " "))
- .put("indented_16", new IndentedLambda(16, " "))
- .build();
-
- if (objs.containsKey("lambda")) {
- LOGGER.warn("A property named 'lambda' already exists. Mustache lambdas renamed from 'lambda' to '_lambda'. " +
- "You'll likely need to use a custom template, " +
- "see https://github.com/swagger-api/swagger-codegen#modifying-the-client-library-format. ");
- objs.put("_lambda", lambdas);
- } else {
- objs.put("lambda", lambdas);
- }
+ @Override
+ protected Builder<String, Lambda> addMustacheLambdas() {
+ return super.addMustacheLambdas()
+ .put("camelcase_param", new CamelCaseLambda().generator(this).escapeAsParamName(true));
}
@Override
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCppCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCppCodegen.java
index 65105e467a869c183d83554517d7bbe42a60c43b..afbbae668485837883f5d945336441f6feaf2874 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCppCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCppCodegen.java
@@ -17,8 +17,8 @@
package org.openapitools.codegen.languages;
-import com.google.common.collect.ImmutableMap;
-import com.samskivert.mustache.Mustache;
+import com.google.common.collect.ImmutableMap.Builder;
+import com.samskivert.mustache.Mustache.Lambda;
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.media.Schema;
@@ -35,7 +35,6 @@ import org.slf4j.LoggerFactory;
import java.io.File;
import java.net.URL;
import java.util.Arrays;
-import java.util.Map;
abstract public class AbstractCppCodegen extends DefaultCodegen implements CodegenConfig {
private static final Logger LOGGER = LoggerFactory.getLogger(AbstractCppCodegen.class);
@@ -260,22 +259,12 @@ abstract public class AbstractCppCodegen extends DefaultCodegen implements Codeg
LOGGER.info("Environment variable CPP_POST_PROCESS_FILE not defined so the C++ code may not be properly formatted. To define it, try 'export CPP_POST_PROCESS_FILE=\"/usr/local/bin/clang-format -i\"' (Linux/Mac)");
LOGGER.info("NOTE: To enable file post-processing, 'enablePostProcessFile' must be set to `true` (--enable-post-process-file for CLI).");
}
-
- addMustacheLambdas(additionalProperties);
}
- private void addMustacheLambdas(Map<String, Object> objs) {
-
- Map<String, Mustache.Lambda> lambdas = new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("multiline_comment_4", new IndentedLambda(4, " ", "///"))
- .build();
-
- if (objs.containsKey("lambda")) {
- LOGGER.warn("A property named 'lambda' already exists. Mustache lambdas renamed from 'lambda' to '_lambda'.");
- objs.put("_lambda", lambdas);
- } else {
- objs.put("lambda", lambdas);
- }
+ @Override
+ protected Builder<String, Lambda> addMustacheLambdas() {
+ return super.addMustacheLambdas()
+ .put("multiline_comment_4", new IndentedLambda(4, " ", "///"));
}
@Override
@@ -304,17 +293,17 @@ abstract public class AbstractCppCodegen extends DefaultCodegen implements Codeg
}
}
}
-
+
@Override
public void preprocessOpenAPI(OpenAPI openAPI) {
URL url = URLPathUtils.getServerURL(openAPI);
String port = URLPathUtils.getPort(url, "");
String host = url.getHost();
if(!port.isEmpty()) {
- this.additionalProperties.put("serverPort", port);
+ this.additionalProperties.put("serverPort", port);
}
if(!host.isEmpty()) {
- this.additionalProperties.put("serverHost", host);
- }
+ this.additionalProperties.put("serverHost", host);
+ }
}
}
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractFSharpCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractFSharpCodegen.java
index 9d82448ffb3b399850efbbef4c6fff71317c7b5b..04a626eac774a38a925fec9d5dc225dc6dfc5b50 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractFSharpCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractFSharpCodegen.java
@@ -16,8 +16,9 @@
package org.openapitools.codegen.languages;
-import com.google.common.collect.ImmutableMap;
-import com.samskivert.mustache.Mustache;
+import com.google.common.collect.ImmutableMap.Builder;
+import com.samskivert.mustache.Mustache.Lambda;
+
import io.swagger.v3.core.util.Json;
import io.swagger.v3.oas.models.media.ArraySchema;
import io.swagger.v3.oas.models.media.Schema;
@@ -67,7 +68,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
protected Set<String> collectionTypes;
protected Set<String> mapTypes;
- // true if nullable types will be supported (as option)
+ // true if nullable types will be supported (as option)
protected boolean supportNullable = Boolean.TRUE;
protected Set<String> nullableType = new HashSet<String>();
@@ -329,32 +330,12 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
// This either updates additionalProperties with the above fixes, or sets the default if the option was not specified.
additionalProperties.put(CodegenConstants.INTERFACE_PREFIX, interfacePrefix);
-
- addMustacheLambdas(additionalProperties);
}
- private void addMustacheLambdas(Map<String, Object> objs) {
-
- Map<String, Mustache.Lambda> lambdas = new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("lowercase", new LowercaseLambda().generator(this))
- .put("uppercase", new UppercaseLambda())
- .put("titlecase", new TitlecaseLambda())
- .put("camelcase", new CamelCaseLambda().generator(this))
- .put("camelcase_param", new CamelCaseLambda().generator(this).escapeAsParamName(true))
- .put("indented", new IndentedLambda())
- .put("indented_8", new IndentedLambda(8, " "))
- .put("indented_12", new IndentedLambda(12, " "))
- .put("indented_16", new IndentedLambda(16, " "))
- .build();
-
- if (objs.containsKey("lambda")) {
- LOGGER.warn("A property named 'lambda' already exists. Mustache lambdas renamed from 'lambda' to '_lambda'. " +
- "You'll likely need to use a custom template, " +
- "see https://github.com/swagger-api/swagger-codegen#modifying-the-client-library-format. ");
- objs.put("_lambda", lambdas);
- } else {
- objs.put("lambda", lambdas);
- }
+ @Override
+ protected Builder<String, Lambda> addMustacheLambdas() {
+ return super.addMustacheLambdas()
+ .put("camelcase_param", new CamelCaseLambda().generator(this).escapeAsParamName(true));
}
@Override
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinServerCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinServerCodegen.java
index 80e48bf0bc02512da078cce2dd6abd76fd4d633b..4bd48eb2188e7fc27b35a1716e3cad251d25e337 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinServerCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinServerCodegen.java
@@ -18,13 +18,11 @@
package org.openapitools.codegen.languages;
import com.google.common.collect.ImmutableMap;
-import com.samskivert.mustache.Mustache;
import org.apache.commons.lang3.StringUtils;
import org.openapitools.codegen.CliOption;
import org.openapitools.codegen.CodegenConstants;
import org.openapitools.codegen.CodegenType;
import org.openapitools.codegen.SupportingFile;
-import org.openapitools.codegen.templating.mustache.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -211,31 +209,6 @@ public class KotlinServerCodegen extends AbstractKotlinCodegen {
final String infrastructureFolder = (sourceFolder + File.separator + packageName + File.separator + "infrastructure").replace(".", File.separator);
supportingFiles.add(new SupportingFile("ApiKeyAuth.kt.mustache", infrastructureFolder, "ApiKeyAuth.kt"));
-
- addMustacheLambdas(additionalProperties);
- }
-
- private void addMustacheLambdas(Map<String, Object> objs) {
-
- Map<String, Mustache.Lambda> lambdas = new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("lowercase", new LowercaseLambda().generator(this))
- .put("uppercase", new UppercaseLambda())
- .put("titlecase", new TitlecaseLambda())
- .put("camelcase", new CamelCaseLambda().generator(this))
- .put("indented", new IndentedLambda())
- .put("indented_8", new IndentedLambda(8, " "))
- .put("indented_12", new IndentedLambda(12, " "))
- .put("indented_16", new IndentedLambda(16, " "))
- .build();
-
- if (objs.containsKey("lambda")) {
- LOGGER.warn("A property named 'lambda' already exists. Mustache lambdas renamed from 'lambda' to '_lambda'. " +
- "You'll likely need to use a custom template, " +
- "see https://github.com/OpenAPITools/openapi-generator/blob/master/docs/templating.md. ");
- objs.put("_lambda", lambdas);
- } else {
- objs.put("lambda", lambdas);
- }
}
public static class Constants {
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinSpringServerCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinSpringServerCodegen.java
index 28e45eb7af4d2bdbc5f80b53a90e6682e39732e5..36c99c39a7088d46abd8d47f00e1ff8ddf3962e2 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinSpringServerCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/KotlinSpringServerCodegen.java
@@ -16,9 +16,11 @@
package org.openapitools.codegen.languages;
-import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMap.Builder;
import com.samskivert.mustache.Mustache;
import com.samskivert.mustache.Template;
+import com.samskivert.mustache.Mustache.Lambda;
+
import io.swagger.v3.oas.models.OpenAPI;
import io.swagger.v3.oas.models.media.Schema;
import org.openapitools.codegen.*;
@@ -51,7 +53,6 @@ public class KotlinSpringServerCodegen extends AbstractKotlinCodegen
));
public static final String TITLE = "title";
- public static final String LAMBDA = "lambda";
public static final String SERVER_PORT = "serverPort";
public static final String BASE_PACKAGE = "basePackage";
public static final String SPRING_BOOT = "spring-boot";
@@ -370,22 +371,14 @@ public class KotlinSpringServerCodegen extends AbstractKotlinCodegen
sanitizeDirectory(sourceFolder + File.separator + basePackage), "Application.kt"));
}
- addMustacheLambdas(additionalProperties);
-
// spring uses the jackson lib, and we disallow configuration.
additionalProperties.put("jackson", "true");
}
- private void addMustacheLambdas(final Map<String, Object> objs) {
- Map<String, Mustache.Lambda> lambdas =
- new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("escapeDoubleQuote", new EscapeLambda("\"", "\\\""))
- .build();
-
- if (objs.containsKey(LAMBDA)) {
- LOGGER.warn("The lambda property is a reserved word, and will be overwritten!");
- }
- objs.put(LAMBDA, lambdas);
+ @Override
+ protected Builder<String, Lambda> addMustacheLambdas() {
+ return super.addMustacheLambdas()
+ .put("escapeDoubleQuote", new EscapeLambda("\"", "\\\""));
}
@Override
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/OpenAPIYamlGenerator.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/OpenAPIYamlGenerator.java
index 5c46567fd940b631418e116906105c80d4f56029..ca1e91026643f347a767922a59b181e628d17280 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/OpenAPIYamlGenerator.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/OpenAPIYamlGenerator.java
@@ -18,21 +18,15 @@
package org.openapitools.codegen.languages;
import org.openapitools.codegen.*;
-import org.openapitools.codegen.templating.mustache.CamelCaseLambda;
-import org.openapitools.codegen.templating.mustache.IndentedLambda;
-import org.openapitools.codegen.templating.mustache.LowercaseLambda;
-import org.openapitools.codegen.templating.mustache.TitlecaseLambda;
-import org.openapitools.codegen.templating.mustache.UppercaseLambda;
+import org.openapitools.codegen.templating.mustache.OnChangeLambda;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.google.common.collect.ImmutableMap;
-import com.samskivert.mustache.Mustache;
-import com.samskivert.mustache.Template;
+import com.google.common.collect.ImmutableMap.Builder;
+import com.samskivert.mustache.Mustache.Lambda;
+
import io.swagger.v3.oas.models.Operation;
-import java.io.IOException;
-import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
@@ -75,32 +69,12 @@ public class OpenAPIYamlGenerator extends DefaultCodegen implements CodegenConfi
}
LOGGER.info("Output file [outputFile={}]", outputFile);
supportingFiles.add(new SupportingFile("openapi.mustache", outputFile));
-
- addMustacheLambdas(additionalProperties);
}
- private void addMustacheLambdas(Map<String, Object> objs) {
-
- Map<String, Mustache.Lambda> lambdas = new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("lowercase", new LowercaseLambda().generator(this))
- .put("uppercase", new UppercaseLambda())
- .put("titlecase", new TitlecaseLambda())
- .put("camelcase", new CamelCaseLambda().generator(this))
- .put("indented", new IndentedLambda())
- .put("indented_8", new IndentedLambda(8, " "))
- .put("indented_12", new IndentedLambda(12, " "))
- .put("indented_16", new IndentedLambda(16, " "))
- .put("onchange", new OnChangeLambda())
- .build();
-
- if (objs.containsKey("lambda")) {
- LOGGER.warn("A property named 'lambda' already exists. Mustache lambdas renamed from 'lambda' to '_lambda'. " +
- "You'll likely need to use a custom template, " +
- "see https://github.com/OpenAPITools/openapi-generator/blob/master/docs/templating.md. ");
- objs.put("_lambda", lambdas);
- } else {
- objs.put("lambda", lambdas);
- }
+ @Override
+ protected Builder<String, Lambda> addMustacheLambdas() {
+ return super.addMustacheLambdas()
+ .put("onchange", new OnChangeLambda());
}
/**
@@ -133,24 +107,4 @@ public class OpenAPIYamlGenerator extends DefaultCodegen implements CodegenConfi
return input;
}
- /**
- * Lambda writes current fragment to the output when it is different than
- * previous fragment.
- */
- public static class OnChangeLambda implements Mustache.Lambda {
- private static final Logger LOGGER = LoggerFactory.getLogger(OnChangeLambda.class);
-
- private String lastVal = null;
-
- @Override
- public void execute(Template.Fragment frag, Writer out) throws IOException {
- String curVal = frag.execute();
- LOGGER.debug("[lastVal={}, curVal={}]", lastVal, curVal);
- if (curVal != null && !curVal.equals(lastVal)) {
- out.write(curVal);
- lastVal = curVal;
- }
- }
- }
-
}
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalaPlayFrameworkServerCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalaPlayFrameworkServerCodegen.java
index a30f0bd7972ccef8029ed5dfacccb3b0e64ca319..1f02cc989f4d662d4aba20a96d7e64b77a6ba64f 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalaPlayFrameworkServerCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalaPlayFrameworkServerCodegen.java
@@ -16,8 +16,9 @@
package org.openapitools.codegen.languages;
-import com.google.common.collect.ImmutableMap;
-import com.samskivert.mustache.Mustache;
+import com.google.common.collect.ImmutableMap.Builder;
+import com.samskivert.mustache.Mustache.Lambda;
+
import io.swagger.v3.oas.models.media.ArraySchema;
import io.swagger.v3.oas.models.media.Schema;
import org.openapitools.codegen.*;
@@ -192,15 +193,12 @@ public class ScalaPlayFrameworkServerCodegen extends AbstractScalaCodegen implem
supportingFiles.add(new SupportingFile("public/openapi.json.mustache", "public", "openapi.json"));
supportingFiles.add(new SupportingFile("app/apiDocController.scala.mustache", String.format(Locale.ROOT, "app/%s", apiPackage.replace(".", File.separator)), "ApiDocController.scala"));
}
- addMustacheLambdas(additionalProperties);
}
- private void addMustacheLambdas(Map<String, Object> objs) {
- Map<String, Mustache.Lambda> lambdas = new ImmutableMap.Builder<String, Mustache.Lambda>()
- .put("indented_4", new IndentedLambda(4, " "))
- .put("indented_8", new IndentedLambda(8, " "))
- .build();
- objs.put("lambda", lambdas);
+ @Override
+ protected Builder<String, Lambda> addMustacheLambdas() {
+ return super.addMustacheLambdas()
+ .put("indented_4", new IndentedLambda(4, " "));
}
@SuppressWarnings("unchecked")
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/OnChangeLambda.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/OnChangeLambda.java
new file mode 100644
index 0000000000000000000000000000000000000000..11efbfae5bb3192f7b2dbd8f93445953d438c290
--- /dev/null
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/OnChangeLambda.java
@@ -0,0 +1,40 @@
+package org.openapitools.codegen.templating.mustache;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.samskivert.mustache.Mustache;
+import com.samskivert.mustache.Template;
+
+/**
+ * Lambda writes current fragment to the output when it is different than
+ * the previous fragment.
+ *
+ * Register:
+ * <pre>
+ * additionalProperties.put("onchange", new OnChangeLambda());
+ * </pre>
+ *
+ * Use:
+ * <pre>
+ * {{#onchange}}{{name}}{{/onchange}}
+ * </pre>
+ */
+public class OnChangeLambda implements Mustache.Lambda {
+ private static final Logger LOGGER = LoggerFactory.getLogger(OnChangeLambda.class);
+
+ private String lastVal = null;
+
+ @Override
+ public void execute(Template.Fragment frag, Writer out) throws IOException {
+ String curVal = frag.execute();
+ LOGGER.debug("[lastVal={}, curVal={}]", lastVal, curVal);
+ if (curVal != null && !curVal.equals(lastVal)) {
+ out.write(curVal);
+ lastVal = curVal;
+ }
+ }
+}
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