org.ros.internal.message.field.LongArrayField.java Source code

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Here is the source code for org.ros.internal.message.field.LongArrayField.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.field;

import com.google.common.base.Preconditions;

import org.jboss.netty.buffer.ChannelBuffer;

import java.util.Arrays;

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

    private final int size;

    private long[] value;

    public static LongArrayField newVariable(FieldType type, String name, int size) {
        Preconditions.checkArgument(type.equals(PrimitiveFieldType.UINT32) || type.equals(PrimitiveFieldType.INT64)
                || type.equals(PrimitiveFieldType.UINT64));
        return new LongArrayField(type, name, size);
    }

    private LongArrayField(FieldType type, String name, int size) {
        super(type, name, false);
        this.size = size;
        setValue(new long[Math.max(0, size)]);
    }

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

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

    @Override
    public void serialize(ChannelBuffer buffer) {
        if (size < 0) {
            buffer.writeInt(value.length);
        }
        for (long v : value) {
            type.serialize(v, buffer);
        }
    }

    @Override
    public void deserialize(ChannelBuffer buffer) {
        int currentSize = size;
        if (currentSize < 0) {
            currentSize = buffer.readInt();
        }
        value = new long[currentSize];
        for (int i = 0; i < currentSize; i++) {
            value[i] = buffer.readLong();
        }
    }

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

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

    @Override
    public String toString() {
        return "LongArrayField<" + 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;
        LongArrayField other = (LongArrayField) obj;
        if (value == null) {
            if (other.value != null)
                return false;
        } else if (!Arrays.equals(value, other.value))
            return false;
        return true;
    }
}