| /** |
| * 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.camel.jsonpath; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.nio.charset.Charset; |
| |
| import com.jayway.jsonpath.Configuration; |
| import com.jayway.jsonpath.JsonPath; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.InvalidPayloadException; |
| import org.apache.camel.NoTypeConversionAvailableException; |
| import org.apache.camel.WrappedFile; |
| import org.apache.camel.component.file.GenericFile; |
| import org.apache.camel.component.file.GenericFileConverter; |
| |
| public class JsonPathEngine { |
| |
| private final JsonPath path; |
| private final Configuration configuration; |
| |
| public JsonPathEngine(String expression) { |
| this.configuration = Configuration.defaultConfiguration(); |
| this.path = JsonPath.compile(expression); |
| } |
| |
| public Object read(Exchange exchange) throws IOException, InvalidPayloadException { |
| Object json = exchange.getIn().getBody(); |
| |
| if (json instanceof GenericFile) { |
| try { |
| json = GenericFileConverter.genericFileToInputStream((GenericFile<?>)json, exchange); |
| } catch (NoTypeConversionAvailableException e) { |
| json = ((WrappedFile<?>)json).getFile(); |
| } |
| } else if (json instanceof WrappedFile) { |
| json = ((WrappedFile<?>) json).getFile(); |
| } |
| |
| // the message body type should use the suitable read method |
| if (configuration.getProvider().isContainer(json)) { |
| return path.read(json); |
| } else if (json instanceof String) { |
| String str = (String) json; |
| return path.read(str); |
| } else if (json instanceof InputStream) { |
| InputStream is = (InputStream) json; |
| return path.read(is); |
| } else if (json instanceof File) { |
| File file = (File) json; |
| return path.read(file); |
| } else if (json instanceof URL) { |
| URL url = (URL) json; |
| return path.read(url); |
| } |
| |
| // fallback as input stream |
| InputStream is = exchange.getIn().getMandatoryBody(InputStream.class); |
| return path.read(is); |
| } |
| } |