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| package org.jboss.cache.optimistic; |
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| public class DefaultDataVersion implements DataVersion |
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| { |
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| private static final long serialVersionUID = -6896315742831861046L; |
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| public static final DataVersion ZERO = new DefaultDataVersion(0L); |
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| private static final DataVersion ONE = new DefaultDataVersion(1L); |
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| private static final DataVersion TWO = new DefaultDataVersion(2L); |
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| private long version; |
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| public DefaultDataVersion()
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| { |
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| } |
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| public DefaultDataVersion(long version)
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| { |
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| this.version = version;
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| } |
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1238
| public DataVersion increment()
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| { |
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| if (this == ZERO)
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| return ONE;
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| } |
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| if (this == ONE)
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| { |
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| return TWO;
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| } |
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| return new DefaultDataVersion(version + 1);
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| } |
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| public boolean newerThan(DataVersion other)
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| { |
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| if (other instanceof DefaultDataVersion)
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| DefaultDataVersion dvOther = (DefaultDataVersion) other;
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| return version > dvOther.version;
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| } |
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| throw new DataVersioningException("Attempting to compare a custom data version (type " + other.getClass() + ") with a DefaultDataVersion instance. Don't know how to compare!");
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| } |
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| public String toString()
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| { |
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| return "Ver=" + version;
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| } |
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| public boolean equals(Object other)
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| { |
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| if (other instanceof DefaultDataVersion)
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| return version == ((DefaultDataVersion) other).version;
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| } |
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| return false;
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| } |
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| public int hashCode()
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| { |
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| return (int) version;
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| } |
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| public long getRawVersion()
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| return version;
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| } |
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| } |