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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project 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 io.netty.example.http2;

import static io.netty.util.internal.ObjectUtil.checkNotNull;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.http.QueryStringDecoder;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * Utility methods used by the example client and server.
 */
public final class Http2ExampleUtil {

    /**
     * Response header sent in response to the http->http2 cleartext upgrade request.
     */
    public static final String UPGRADE_RESPONSE_HEADER = "http-to-http2-upgrade";

    /**
     * Size of the block to be read from the input stream.
     */
    private static final int BLOCK_SIZE = 1024;

    private Http2ExampleUtil() { }

    /**
     * @param string the string to be converted to an integer.
     * @param defaultValue the default value
     * @return the integer value of a string or the default value, if the string is either null or empty.
     */
    public static int toInt(String string, int defaultValue) {
        if (string != null && !string.isEmpty()) {
            return Integer.parseInt(string);
        }
        return defaultValue;
    }

    /**
     * Reads an InputStream into a byte array.
     * @param input the InputStream.
     * @return a byte array representation of the InputStream.
     * @throws IOException if an I/O exception of some sort happens while reading the InputStream.
     */
    public static ByteBuf toByteBuf(InputStream input) throws IOException {
        ByteBuf buf = Unpooled.buffer();
        int n = 0;
        do {
            n = buf.writeBytes(input, BLOCK_SIZE);
        } while (n > 0);
        return buf;
    }

    /**
     * @param query the decoder of query string
     * @param key the key to lookup
     * @return the first occurrence of that key in the string parameters
     */
    public static String firstValue(QueryStringDecoder query, String key) {
        checkNotNull(query, "Query can't be null!");
        List values = query.parameters().get(key);
        if (values == null || values.isEmpty()) {
            return null;
        }
        return values.get(0);
    }
}