| /** |
| * 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.component.stringtemplate; |
| |
| import java.io.StringWriter; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.antlr.stringtemplate.AutoIndentWriter; |
| import org.antlr.stringtemplate.StringTemplate; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ExchangePattern; |
| import org.apache.camel.Message; |
| import org.apache.camel.Processor; |
| import org.apache.camel.component.ResourceBasedEndpoint; |
| import org.apache.camel.util.ExchangeHelper; |
| |
| /** |
| * @version |
| */ |
| public class StringTemplateEndpoint extends ResourceBasedEndpoint { |
| |
| public StringTemplateEndpoint(String uri, StringTemplateComponent component, String resourceUri, Map parameters) { |
| super(uri, component, resourceUri, null); |
| } |
| |
| public StringTemplateEndpoint(String endpointUri, Processor processor, String resourceUri) { |
| super(endpointUri, processor, resourceUri); |
| } |
| |
| @Override |
| public boolean isSingleton() { |
| return true; |
| } |
| |
| @Override |
| public ExchangePattern getExchangePattern() { |
| return ExchangePattern.InOut; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| protected void onExchange(Exchange exchange) throws Exception { |
| StringWriter buffer = new StringWriter(); |
| Map<String, Object> variableMap = ExchangeHelper.createVariableMap(exchange); |
| |
| // getResourceAsInputStream also considers the content cache |
| String text = exchange.getContext().getTypeConverter().mandatoryConvertTo(String.class, getResourceAsInputStream()); |
| StringTemplate template = new StringTemplate(text); |
| template.setAttributes(variableMap); |
| log.debug("StringTemplate is writing using attributes: {}", variableMap); |
| template.write(new AutoIndentWriter(buffer)); |
| |
| // now lets output the results to the exchange |
| Message out = exchange.getOut(); |
| out.setBody(buffer.toString()); |
| out.setHeader(StringTemplateConstants.STRINGTEMPLATE_RESOURCE, getResource()); |
| Map<String, Object> headers = (Map<String, Object>) variableMap.get("headers"); |
| for (Entry<String, Object> entry : headers.entrySet()) { |
| out.setHeader(entry.getKey(), entry.getValue()); |
| } |
| } |
| } |