Examples of org.apache.commons.lang.builder.CompareToBuilder

org.apache.commons.lang.builder.CompareToBuilder
Assists in implementing {@link java.lang.Comparable#compareTo(Object)} methods.It is consistent with equals(Object) and hashcode() built with {@link EqualsBuilder} and{@link HashCodeBuilder}.

Two Objects that compare equal using equals(Object) should normally also compare equal using compareTo(Object).

All relevant fields should be included in the calculation of the comparison. Derived fields may be ignored. The same fields, in the same order, should be used in both compareTo(Object) and equals(Object).

To use this class write code as follows:
```
 public class MyClass { String field1; int field2; boolean field3; ... public int compareTo(Object o) { MyClass myClass = (MyClass) o; return new CompareToBuilder() .appendSuper(super.compareTo(o) .append(this.field1, myClass.field1) .append(this.field2, myClass.field2) .append(this.field3, myClass.field3) .toComparison(); } } 
```
Alternatively, there is are {@link #reflectionCompare reflectionCompare} method that usesreflection to determine the fields to append. Because fields can be private, reflectionCompare uses {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} tobypass normal access control checks. This will fail under a security manager, unless the appropriate permissions are set up correctly. It is also slower than appending explicitly.

A typical implementation of compareTo(Object) using reflectionCompare looks like:
```
 public int compareTo(Object o) { return CompareToBuilder.reflectionCompare(this, o); } 
```
@see java.lang.Comparable @see java.lang.Object#equals(Object) @see java.lang.Object#hashCode() @see EqualsBuilder @see HashCodeBuilder @author Steve Downey @author Stephen Colebourne @author Gary Gregory @author Pete Gieser @since 1.0 @version $Id: CompareToBuilder.java 161243 2005-04-14 04:30:28Z ggregory $

            compare = -1;
        else
        {
            BaseVO castObj = (BaseVO) obj;


            CompareToBuilder builder = new CompareToBuilder();


            builder.append(this.getId(), castObj.getId());


            compare = builder.toComparison();
        }


        return compare;
    }

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        }


        Collections.sort(list, new Comparator<SessionInfoBean>() {
            public int compare(SessionInfoBean bean1, SessionInfoBean bean2)
            {
                CompareToBuilder builder = new CompareToBuilder();


                builder.append(bean2.getLastAccessTime(), bean1.getLastAccessTime());
                builder.append(bean1.getUsername(), bean2.getUsername());


                return builder.toComparison();
            }
        });


        request.setAttribute("list", list);

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    private static class EventCalendarComparator implements Comparator<EventCalendarVO>
    {
        public int compare(EventCalendarVO o1, EventCalendarVO o2)
        {
            CompareToBuilder builder = new CompareToBuilder();
            
            builder.append(o1.getParticipiantType(), o2.getParticipiantType());
            builder.append(o1.getCalendar().getUser().getUserName(), o2.getCalendar().getUser().getUserName());
            
            return builder.toComparison();
        }

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    private static class EventPersonComparator implements Comparator<EventPersonVO>
    {
        public int compare(EventPersonVO o1, EventPersonVO o2)
        {
            CompareToBuilder builder = new CompareToBuilder();
            
            builder.append(o1.getPerson().getLastName(), o2.getPerson().getLastName());
            builder.append(o1.getPerson().getFirstName(), o2.getPerson().getFirstName());
            
            return builder.toComparison();
        }

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    }


    /** @see Comparable#compareTo(Object) */
    public int compareTo(Rule r)
    {
        return new CompareToBuilder()
                .append(getAction(), r.getAction())
                .append(getIdentity(), r.getIdentity())
                .append(getPermission(), r.getPermission())
                .toComparison();
    }

View Full Code Here

    }


    @Override
    public int compare(ParticipantResult left, ParticipantResult right)
    {
        return new CompareToBuilder()
            .append(getTypeCode(left), getTypeCode(right))
            .append(left.getParticipantName(), right.getParticipantName())
            .toComparison();
    }

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    }


    @Override
    public int compareTo(Rule r)
    {
        return new CompareToBuilder()
                .append(getAction(), r.getAction())
                .append(getIdentity(), r.getIdentity())
                .append(getPermission(), r.getPermission())
                .toComparison();
    }

View Full Code Here


  /**
   * 子包优先
   */
  public int compareTo(Profile other) {
    return new CompareToBuilder().append(other.actionPattern, this.actionPattern)
        .toComparison();
  }

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    }
    indexes = newIndexes;
  }


  public int compareTo(Table o) {
    return new CompareToBuilder().append(getSchema(), o.getSchema()).append(getName(), o.getName())
        .toComparison();
  }

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      Collections.sort(appVersionList, new Comparator<ApplicationVersionDescription>() {
        @Override
        public int compare(ApplicationVersionDescription o1,
            ApplicationVersionDescription o2) {
          return new CompareToBuilder().append(o2.getDateUpdated(), o1.getDateUpdated()).append(o2.getDateCreated(), o1.getDateUpdated()).toComparison();
        }
      });
      
      if (appVersionList.isEmpty()) {
        String message = "No version label supplied **AND** no app versions available.";

View Full Code Here

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