Templates.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 io.undertow.js.templates;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import io.undertow.js.UndertowScriptLogger;
import io.undertow.server.handlers.resource.Resource;
import io.undertow.server.handlers.resource.ResourceManager;

/**
 * @author Stuart Douglas
 */
public class Templates {

    public static String loadTemplate(String template, ResourceManager resourceManager) throws Exception {
        byte[] buf = new byte[1024];
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        Resource resource = resourceManager.getResource(template);
        if(resource == null) {
            throw UndertowScriptLogger.ROOT_LOGGER.templateNotFound(template);
        }
        try (InputStream stream = resource.getUrl().openStream()) {
            if(stream == null) {
                throw UndertowScriptLogger.ROOT_LOGGER.templateNotFound(template);
            }
            int res;
            while ((res = stream.read(buf)) > 0) {
                out.write(buf, 0, res);
            }
            return out.toString("UTF-8");
        }
    }

}