protonj2-test-driver/src/main/java/org/apache/qpid/protonj2/test/driver/codec/DoubleElement.java

/*
 * 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.qpid.protonj2.test.driver.codec;

import io.netty.buffer.ByteBuf;

class DoubleElement extends AtomicElement<Double> {

    private final double value;

    DoubleElement(Element<?> parent, Element<?> prev, double d) {
        super(parent, prev);
        value = d;
    }

    @Override
    public int size() {
        return isElementOfArray() ? 8 : 9;
    }

    @Override
    public Double getValue() {
        return value;
    }

    @Override
    public Codec.DataType getDataType() {
        return Codec.DataType.DOUBLE;
    }

    @Override
    public int encode(ByteBuf buffer) {
        int size = size();
        if (buffer.maxWritableBytes() >= size) {
            if (size == 9) {
                buffer.writeByte((byte) 0x82);
            }
            buffer.writeDouble(value);
            return size;
        } else {
            return 0;
        }
    }
}