init code

[vfc/nfvo/wfengine.git] / wso2 / wso2bpel-ext / wso2bpel-core / wso2bpel-mgr / src / main / java / org / openo / carbon / bpel / util / JsonUtil.java

diff --git a/wso2/wso2bpel-ext/wso2bpel-core/wso2bpel-mgr/src/main/java/org/openo/carbon/bpel/util/JsonUtil.java b/wso2/wso2bpel-ext/wso2bpel-core/wso2bpel-mgr/src/main/java/org/openo/carbon/bpel/util/JsonUtil.java
new file mode 100644 (file)
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--- /dev/null
+++ b/wso2/wso2bpel-ext/wso2bpel-core/wso2bpel-mgr/src/main/java/org/openo/carbon/bpel/util/JsonUtil.java
@@ -0,0 +1,61 @@
+/**
+ * Copyright 2016 ZTE Corporation.
+ *
+ * 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.openo.carbon.bpel.util;
+
+import java.io.IOException;
+import java.io.StringWriter;
+
+import com.fasterxml.jackson.core.JsonFactory;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JsonUtil {
+
+  @SuppressWarnings("deprecation")
+  public static String bean2Json(Object obj) throws IOException {
+    ObjectMapper mapper = new ObjectMapper();
+    StringWriter sw = new StringWriter();
+    JsonGenerator gen = new JsonFactory().createJsonGenerator(sw);
+    mapper.writeValue(gen, obj);
+    gen.close();
+    return sw.toString();
+  }
+
+  public static <T> T json2Bean(String jsonStr, Class<T> objClass)
+      throws JsonParseException, JsonMappingException, IOException {
+    ObjectMapper mapper = new ObjectMapper();
+    return mapper.readValue(jsonStr, objClass);
+  }
+
+  @SuppressWarnings("deprecation")
+  public static <T> T readJson(String jsonStr, Class<?> collectionClass, Class<?>... elementClasses)
+      throws Exception {
+    ObjectMapper mapper = new ObjectMapper();
+    JavaType javaType =
+        mapper.getTypeFactory().constructParametricType(collectionClass, elementClasses);
+    return mapper.readValue(jsonStr, javaType);
+  }
+
+  public static JsonNode getJsonNode(String json) throws JsonProcessingException, IOException {
+    return new ObjectMapper().readTree(json);
+  }
+
+}