org.ros.internal.message.new_style.ServiceMessageDefinition.java Source code

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Here is the source code for org.ros.internal.message.new_style.ServiceMessageDefinition.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.new_style;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;

import org.ros.internal.transport.ConnectionHeaderFields;

import java.util.Map;

/**
 * @author damonkohler@google.com (Damon Kohler)
 */
public class ServiceMessageDefinition {

    private final String type;
    private final String md5Checksum;

    public ServiceMessageDefinition(String type, String md5Checksum) {
        this.type = type;
        this.md5Checksum = md5Checksum;
    }

    public String getType() {
        return type;
    }

    public String getMd5Checksum() {
        return md5Checksum;
    }

    public Map<String, String> toHeader() {
        Preconditions.checkNotNull(md5Checksum);
        return new ImmutableMap.Builder<String, String>().put(ConnectionHeaderFields.TYPE, type)
                .put(ConnectionHeaderFields.MD5_CHECKSUM, md5Checksum).build();
    }

    @Override
    public String toString() {
        return "ServiceMessageDefinition<" + type + "," + md5Checksum + ">";
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((md5Checksum == null) ? 0 : md5Checksum.hashCode());
        result = prime * result + ((type == null) ? 0 : type.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        ServiceMessageDefinition other = (ServiceMessageDefinition) obj;
        if (md5Checksum == null) {
            if (other.md5Checksum != null)
                return false;
        } else if (!md5Checksum.equals(other.md5Checksum))
            return false;
        if (type == null) {
            if (other.type != null)
                return false;
        } else if (!type.equals(other.type))
            return false;
        return true;
    }
}