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author | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2011-07-28 11:07:25 +0000 |
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committer | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2011-07-28 11:07:25 +0000 |
commit | 2e0a5f4c1368993c8cf71b9f4b59273a323b9aff (patch) | |
tree | 595b08df45fd35819afb93a8acc2b3b24359fee4 /sca-java-2.x/branches/2.0-Beta3/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/JSONUtil.java | |
parent | 04dcd09976ecc5aa2948993b9a9a2d90d239ee44 (diff) |
Recreate 2.0-Beta3 branch from current trunk
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1151792 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/branches/2.0-Beta3/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/JSONUtil.java | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0-Beta3/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/JSONUtil.java b/sca-java-2.x/branches/2.0-Beta3/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/JSONUtil.java new file mode 100644 index 0000000000..79ec156131 --- /dev/null +++ b/sca-java-2.x/branches/2.0-Beta3/modules/binding-comet-runtime/src/main/java/org/apache/tuscany/sca/binding/comet/runtime/JSONUtil.java @@ -0,0 +1,145 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.apache.tuscany.sca.binding.comet.runtime; + +import java.util.ArrayList; +import java.util.List; + +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.Operation; + +import com.google.gson.Gson; + +/** + * Helper class to facilitate JSON convertions. + */ +public class JSONUtil { + + private static Gson gson = new Gson(); + + /** + * Convert request parameters from JSON to operation parameter types. + * + * @param jsonData + * parameters in JSON array format + * @param operation + * the operation to invoke + * @return an array of objects + */ + public static Object[] decodeJsonParamsForOperation(String jsonData, Operation operation) { + Object[] args = new Object[operation.getInputType().getLogical().size()]; + final String[] json = parseArray(jsonData); + int index = 0; + for (final DataType<?> dataType : operation.getInputType().getLogical()) { + args[index] = gson.fromJson(json[index], dataType.getPhysical()); + index++; + } + return args; + } + + /** + * Split the JSON array containing the arguments for the method call in + * order to avoid converting JSON to Object[]. Converting each object + * separately to it's corresponding type avoids type mismatch problems at + * service invocation. + * + * @param jsonArray + * the JSON array + * @return an array of JSON formatted strings + */ + private static String[] parseArray(String jsonArray) { + List<String> objects = new ArrayList<String>(); + int bracketNum = 0; + int parNum = 0; + int quoteNum = 0; + int startPos = 1; + for (int i = 0; i < jsonArray.length(); i++) { + switch (jsonArray.charAt(i)) { + case '{': + bracketNum++; + break; + case '}': + bracketNum--; + break; + case '[': + parNum++; + break; + case ']': + parNum--; + break; + case '\"': + quoteNum++; + break; + case ',': + if ((bracketNum == 0) && (parNum == 1) && quoteNum % 2 == 0) { + objects.add(jsonArray.substring(startPos, i)); + startPos = i + 1; + } + } + } + objects.add(jsonArray.substring(startPos, jsonArray.length() - 1)); + return objects.toArray(new String[] {}); + } + + private JSONUtil() { + } + + /** + * Converts a Java object to JSON format. + * + * @param response + * the response to convert + * @return the object in JSON format + */ + public static String encodeResponse(Object response) { + return gson.toJson(response); + } + + /** + * Convert request parameters as JSON array. + * + * @param params + * request parameters + * @return request parameters as JSON array + */ + public static String encodeRequestParams(Object[] params) { + StringBuilder builder = new StringBuilder(); + for (int index = 0; index < params.length; index++) { + Object param = params[index]; + builder.append(index == 0 ? "[" : ","); + builder.append(gson.toJson(param)); + } + builder.append("]"); + return builder.toString(); + } + + /** + * Decode JSON to a given Java type. + * + * @param responseJSON + * the json to convert + * @param returnType + * the return type to convert to + * @return the converted object + */ + public static Object decodeResponse(String responseJSON, Class<?> returnType) { + return gson.fromJson(responseJSON, returnType); + } + +} |