Examples of org.apache.commons.lang3.builder.CompareToBuilder

Package org.apache.commons.lang3.builder

Examples of org.apache.commons.lang3.builder.CompareToBuilder

org.apache.commons.lang3.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 are {@link #reflectionCompare(Object,Object) reflectionCompare} methods that usereflection 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 Apache Software Foundation @author Steve Downey @author Gary Gregory @author Pete Gieser @since 1.0 @version $Id: CompareToBuilder.java 965941 2010-07-20 18:10:34Z bayard $


    @Override
    public int compareTo(
        @NotNull(message = "other can't be NULL") final RepoCommit other
    ) {
        return new CompareToBuilder().append(
            this.repo().coordinates(),
            other.repo().coordinates()
        ).append(this.sha(), other.sha()).build();
    }

View Full Code Here


    @Override
    public int compareTo(
        @NotNull(message = "cont should not be NULL") final Content cont
    ) {
        return new CompareToBuilder()
            .append(this.path(), cont.path())
                .append(this.repo().coordinates(), cont.repo().coordinates())
            .build();
    }

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        @Override
        public int compareTo(
            @NotNull(message = "label can't be NULL") final Label label
        ) {
            return new CompareToBuilder()
                .append(this.repo().coordinates(), label.repo().coordinates())
                .append(this.obj, label.name())
                .build();
        }

View Full Code Here

        }
        @Override
        public int compareTo(
            @NotNull(message = "other can't be NULL") final Coordinates other
        ) {
            return new CompareToBuilder()
                .append(this.usr, other.user())
                .append(this.rpo, other.repo())
                .build();
        }

View Full Code Here

     */
    @Override
    public int compareTo(Object object)
    {
        ReportableListObject myClass = (ReportableListObject) object;
        return new CompareToBuilder()
            .append(this.project, myClass.project)
            .append(this.amount, myClass.amount)
            .append(this.city, myClass.city)
            .append(this.task, myClass.task)
            .toComparison();

View Full Code Here

     * @param other  the other triple, not null
     * @return negative if this is less, zero if equal, positive if greater
     */
    @Override
    public int compareTo(final Triple<L, M, R> other) {
      return new CompareToBuilder().append(getLeft(), other.getLeft())
          .append(getMiddle(), other.getMiddle())
          .append(getRight(), other.getRight()).toComparison();
    }

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     * @param other  the other pair, not null
     * @return negative if this is less, zero if equal, positive if greater
     */
    @Override
    public int compareTo(final Pair<L, R> other) {
      return new CompareToBuilder().append(getLeft(), other.getLeft())
              .append(getRight(), other.getRight()).toComparison();
    }

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        List<Field> myFields = new ArrayList<Field>();
        myFields.addAll(fields);
        Collections.sort(myFields, new Comparator<Field>() {
            @Override
            public int compare(Field o1, Field o2) {
                return new CompareToBuilder()
                    .append(o1.getOrder(), o2.getOrder())
                    .append(o1.getFriendlyName(), o2.getFriendlyName())
                    .append(o1.getName(), o2.getName())
                    .toComparison();
            }
        });
        if (!alternateOrderedFields.isEmpty()) {
            List<Field> mapFieldsList = new ArrayList<Field>(alternateOrderedFields);
            Collections.sort(mapFieldsList, new Comparator<Field>() {
                @Override
                public int compare(Field o1, Field o2) {
                    return new CompareToBuilder()
                        .append(o1.getOrder(), o2.getOrder())
                        .append(o1.getFriendlyName(), o2.getFriendlyName())
                        .append(o1.getName(), o2.getName())
                        .toComparison();
                }

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            if (StringUtils.isNotEmpty(sorts)) {
                Collections.sort(contentItems, new Comparator<StructuredContentDTO>() {
                    @Override
                    public int compare(StructuredContentDTO o1, StructuredContentDTO o2) {
                        AssignationSequence sortAssignments = AssignationUtils.parseAssignationSequence(arguments.getConfiguration(), arguments, sorts, false);
                        CompareToBuilder compareBuilder = new CompareToBuilder();
                        for (Assignation sortAssignment : sortAssignments) {
                            String property = sortAssignment.getLeft().getStringRepresentation();
                            
                            Object val1 = o1.getPropertyValue(property);
                            Object val2 = o2.getPropertyValue(property);
                            
                            if (sortAssignment.getRight().execute(arguments.getConfiguration(), arguments).equals("ASCENDING")) {
                                compareBuilder.append(val1, val2);
                            } else {
                                compareBuilder.append(val2, val1);
                            }
                        }
                        return compareBuilder.toComparison();
                    }
                });
            }
            
            List<Map<String, Object>> contentItemFields = new ArrayList<Map<String, Object>>();

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                String friendlyName2 = o2.getMetadata().getFriendlyName() == null ? "zzzz" : o2.getMetadata().getFriendlyName();


                String name1 = o1.getName() == null ? "zzzzz" : o1.getName();
                String name2 = o2.getName() == null ? "zzzzz" : o2.getName();


                return new CompareToBuilder()
                        .append(tabOrder1, tabOrder2)
                        .append(groupOrder1, groupOrder2)
                        .append(fieldOrder1, fieldOrder2)
                        .append(friendlyName1, friendlyName2)
                        .append(name1, name2)

View Full Code Here

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