org.ros.internal.message.ShortArrayField.java Source code

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Here is the source code for org.ros.internal.message.ShortArrayField.java

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/*
 * Copyright (C) 2011 Google Inc.
 * 
 * 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 org.ros.internal.message;

import com.google.common.base.Preconditions;

import java.nio.ByteBuffer;
import java.util.Arrays;

/**
 * @author damonkohler@google.com (Damon Kohler)
 */
public class ShortArrayField extends Field {

    private final int size;

    private short[] value;

    public static ShortArrayField newVariable(FieldType type, int size, String name) {
        Preconditions.checkArgument(type.equals(PrimitiveFieldType.UINT8) || type.equals(PrimitiveFieldType.INT16));
        return new ShortArrayField(type, size, name, new short[Math.max(0, size)]);
    }

    private ShortArrayField(FieldType type, int size, String name, short[] value) {
        super(type, name, false);
        this.size = size;
        setValue(value);
    }

    @SuppressWarnings("unchecked")
    @Override
    public short[] getValue() {
        return value;
    }

    @Override
    public void setValue(Object value) {
        Preconditions.checkArgument(size < 0 || ((short[]) value).length == size);
        this.value = (short[]) value;
    }

    @Override
    public void serialize(ByteBuffer buffer) {
        buffer.putInt(value.length);
        for (short v : value) {
            type.serialize(v, buffer);
        }
    }

    @Override
    public void deserialize(ByteBuffer buffer) {
        int size = buffer.getInt();
        value = new short[size];
        for (int i = 0; i < size; i++) {
            value[i] = (Short) type.deserialize(buffer);
        }
    }

    @Override
    public String getMd5String() {
        return String.format("%s %s\n", type, name);
    }

    @Override
    public int getSerializedSize() {
        Preconditions.checkNotNull(value);
        // Reserve 4 bytes for the length.
        int size = 4;
        size += type.getSerializedSize() * value.length;
        return size;
    }

    @Override
    public String getJavaTypeName() {
        return type.getJavaTypeName() + "[]";
    }

    @Override
    public String toString() {
        return "ShortArrayField<" + type + ", " + name + ">";
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = super.hashCode();
        result = prime * result + ((value == null) ? 0 : value.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (!super.equals(obj))
            return false;
        if (getClass() != obj.getClass())
            return false;
        ShortArrayField other = (ShortArrayField) obj;
        if (value == null) {
            if (other.value != null)
                return false;
        } else if (!Arrays.equals(value, other.value))
            return false;
        return true;
    }
}