1 files changed, 82 insertions, 0 deletions
diff --git a/dictionaryvalidation/src/main/java/org/onap/validation/yaml/YamlLoader.java b/dictionaryvalidation/src/main/java/org/onap/validation/yaml/YamlLoader.java
new file mode 100644
index 0000000..c23da0a
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+++ b/dictionaryvalidation/src/main/java/org/onap/validation/yaml/YamlLoader.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 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.onap.validation.yaml;
+
+import org.onap.validation.yaml.exception.YamlProcessingException;
+import org.onap.validation.yaml.model.YamlDocument;
+import org.onap.validation.yaml.model.YamlDocumentFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yaml.snakeyaml.Yaml;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+class YamlLoader {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(YamlLoader.class);
+    private final YamlDocumentFactory documentFactory;
+
+    YamlLoader(YamlDocumentFactory documentFactory) {
+        this.documentFactory = documentFactory;
+    }
+
+    List<YamlDocument> loadMultiDocumentYaml(byte[] yamlWithSchema)
+            throws YamlDocumentFactory.YamlDocumentParsingException {
+        List<YamlDocument> documents = new ArrayList<>();
+        try (InputStream yamlStream = new ByteArrayInputStream(yamlWithSchema)) {
+            documents.addAll(loadMultiDocumentYaml(yamlStream));
+        } catch (IOException e) {
+            LOGGER.error("Failed to load multi document YAML", e);
+        }
+        return documents;
+    }
+
+    List<YamlDocument> loadMultiDocumentYamlFile(URL path)
+            throws YamlDocumentFactory.YamlDocumentParsingException {
+        List<YamlDocument> documents = new ArrayList<>();
+        try (InputStream yamlStream = path.openStream()) {
+            documents.addAll(loadMultiDocumentYaml(yamlStream));
+        } catch (IOException e) {
+            LOGGER.error("Failed to load multi document YAML file", e);
+        }
+        return documents;
+    }
+
+    List<YamlDocument> loadMultiDocumentYamlFile(String path)
+            throws YamlProcessingException {
+        try {
+            return loadMultiDocumentYamlFile(new URL("file://" + path));
+        } catch (MalformedURLException e) {
+            throw new YamlProcessingException("Fail to read file under given path.", e);
+        }
+    }
+
+    private List<YamlDocument> loadMultiDocumentYaml(InputStream yamlStream) throws YamlDocumentFactory.YamlDocumentParsingException {
+        List<YamlDocument> documents = new ArrayList<>();
+        for (Object yamlDocument : new Yaml().loadAll(yamlStream)) {
+            documents.add(documentFactory.createYamlDocument(yamlDocument));
+        }
+        return documents;
+    }
+}