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 $

                .append(shiftDate)
                .toHashCode();
    }


    public int compareTo(EmployeeConsecutiveAssignmentEnd other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(shiftDate, other.shiftDate)
                .toComparison();
    }

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                .append(lastDayIndex)
                .toHashCode();
    }


    public int compareTo(EmployeeFreeSequence other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(firstDayIndex, other.firstDayIndex)
                .append(lastDayIndex, other.lastDayIndex)
                .toComparison();
    }

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                .append(total)
                .toHashCode();
    }


    public int compareTo(EmployeeAssignmentTotal other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(total, other.total)
                .toComparison();
    }

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                .append(lastSundayIndex)
                .toHashCode();
    }


    public int compareTo(EmployeeWeekendSequence other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(firstSundayIndex, other.firstSundayIndex)
                .append(lastSundayIndex, other.lastSundayIndex)
                .toComparison();
    }

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public class ShiftAssignmentDifficultyComparator implements Comparator<ShiftAssignment>, Serializable {


    public int compare(ShiftAssignment a, ShiftAssignment b) {
        Shift aShift = a.getShift();
        Shift bShift = b.getShift();
        return new CompareToBuilder()
                    .append(bShift.getShiftDate(), aShift.getShiftDate()) // Descending
                    .append(bShift.getShiftType(), aShift.getShiftType()) // Descending
                    // For construction heuristics, scheduling the shifts in sequence is better
                    .append(aShift.getRequiredEmployeeSize(), bShift.getRequiredEmployeeSize())
                    .toComparison();

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                .append(sundayIndex)
                .toHashCode();
    }


    public int compareTo(EmployeeConsecutiveWeekendAssignmentStart other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(sundayIndex, other.sundayIndex)
                .toComparison();
    }

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public class EmployeeStrengthComparator implements Comparator<Employee>, Serializable {


    public int compare(Employee a, Employee b) {
        // TODO refactor to DifficultyWeightFactory and use getContract().getContractLineList()
        // to sum maximumValue and minimumValue etc
        return new CompareToBuilder()
                .append(b.getWeekendLength(), a.getWeekendLength()) // Descending
                .append(a.getId(), b.getId())
                .toComparison();
    }

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                .append(shiftDate)
                .toHashCode();
    }


    public int compareTo(EmployeeConsecutiveAssignmentStart other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(shiftDate, other.shiftDate)
                .toComparison();
    }

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                .append(sundayIndex)
                .toHashCode();
    }


    public int compareTo(EmployeeConsecutiveWeekendAssignmentEnd other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(sundayIndex, other.sundayIndex)
                .toComparison();
    }

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                .append(lastDayIndex)
                .toHashCode();
    }


    public int compareTo(EmployeeWorkSequence other) {
        return new CompareToBuilder()
                .append(employee, other.employee)
                .append(firstDayIndex, other.firstDayIndex)
                .append(lastDayIndex, other.lastDayIndex)
                .toComparison();
    }

View Full Code Here

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