package ca.uhn.fhir.tinder;
/*
* #%L
* HAPI FHIR Tinder Plug-In
* %%
* Copyright (C) 2014 - 2016 University Health Network
* %%
* 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.
* #L%
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map.Entry;
import java.util.Properties;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.runtime.RuntimeConstants;
public class VelocityHelper {
public static VelocityEngine configureVelocityEngine (File templateFile, String velocityPath, String propertyFile) throws IOException {
VelocityEngine result = new VelocityEngine();
boolean haveResourceLoader = false;
boolean haveRuntimeReferences = false;
if (propertyFile != null) {
File propFile = new File(propertyFile);
if (propFile.exists() && propFile.isFile() && propFile.canRead()) {
InputStream propsIn = new FileInputStream(propFile);
Properties props = new Properties();
props.load(propsIn);
propsIn.close();
for (Entry<?,?> entry : props.entrySet()) {
String key = (String)entry.getKey();
result.setProperty(key, entry.getValue());
if (RuntimeConstants.RESOURCE_LOADER.equals(key)) {
haveResourceLoader = true;
} else
if (RuntimeConstants.RUNTIME_REFERENCES_STRICT.equals(key)) {
haveRuntimeReferences = true;
}
}
} else {
throw new FileNotFoundException("Velocity property file ["+propertyFile+"] does not exist or is not readable.");
}
}
if (!haveResourceLoader) {
if (templateFile != null) {
result.setProperty(RuntimeConstants.RESOURCE_LOADER, "file");
result.setProperty("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.FileResourceLoader");
if (velocityPath != null) {
result.setProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, velocityPath);
} else {
String path = templateFile.getCanonicalFile().getParent();
if (null == path) {
path = ".";
}
result.setProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, path);
}
} else {
result.setProperty("resource.loader", "cp");
result.setProperty("cp.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
}
}
if (!haveRuntimeReferences) {
result.setProperty(RuntimeConstants.RUNTIME_REFERENCES_STRICT, Boolean.TRUE);
}
return result;
}
}