Package org.apache.commons.lang3.builder

Class DiffResult<T>

java.lang.Object

org.apache.commons.lang3.builder.DiffResult<T>

Type Parameters:

T - type of the left and right object.

All Implemented Interfaces:

Iterable<Diff<?>>

public class DiffResult<T>
extends Object
implements Iterable<Diff<?>>

A DiffResult contains a collection of the differences between two Diffable objects. Typically these differences are displayed using toString() method, which returns a string describing the fields that differ between the objects.

Use a DiffBuilder to build a DiffResult comparing two objects.

Since:

3.3

Field Summary

Fields

Modifier and Type	Field	Description
static final String	OBJECTS_SAME_STRING	The String returned when the objects have no differences: ""

Method Summary

Modifier and Type	Method	Description
List<Diff<?>>	getDiffs()	Gets an unmodifiable list of Diffs.
T	getLeft()	Gets the object the right object has been compared to.
int	getNumberOfDiffs()	Gets the number of differences between the two objects.
T	getRight()	Gets the object the left object has been compared to.
ToStringStyle	getToStringStyle()	Gets the style used by the toString() method.
Iterator<Diff<?>>	iterator()	Returns an iterator over the Diff objects contained in this list.
String	toString()	Builds a String description of the differences contained within this DiffResult.
String	toString(ToStringStyle style)	Builds a String description of the differences contained within this DiffResult, using the supplied ToStringStyle.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

OBJECTS_SAME_STRING

public static final String OBJECTS_SAME_STRING

The String returned when the objects have no differences: ""

See Also:

• Constant Field Values

Method Details

getDiffs

public List<Diff<?>> getDiffs()

Gets an unmodifiable list of Diffs. The list may be empty if there were no differences between the objects.

Returns:

an unmodifiable list of Diffs

getLeft

public T getLeft()

Gets the object the right object has been compared to.

Returns:

the left object of the diff

Since:

3.10

getNumberOfDiffs

public int getNumberOfDiffs()

Gets the number of differences between the two objects.

Returns:

the number of differences

getRight

public T getRight()

Gets the object the left object has been compared to.

Returns:

the right object of the diff

Since:

3.10

getToStringStyle

public ToStringStyle getToStringStyle()

Gets the style used by the toString() method.

Returns:

the style

iterator

public Iterator<Diff<?>> iterator()

Returns an iterator over the Diff objects contained in this list.

Specified by:

iterator in interface Iterable<T>

Returns:

the iterator

toString

public String toString()

Builds a String description of the differences contained within this DiffResult. A ToStringBuilder is used for each object and the style of the output is governed by the ToStringStyle passed to the constructor.

If there are no differences stored in this list, the method will return OBJECTS_SAME_STRING. Otherwise, using the example given in Diffable and ToStringStyle.SHORT_PREFIX_STYLE, an output might be:

 Person[name=John Doe,age=32] differs from Person[name=Joe Bloggs,age=26]
 

This indicates that the objects differ in name and age, but not in smoking status.

To use a different ToStringStyle for an instance of this class, use toString(ToStringStyle).

Overrides:

toString in class Object

Returns:

a String description of the differences.

toString

public String toString(ToStringStyle style)

Builds a String description of the differences contained within this DiffResult, using the supplied ToStringStyle.

Parameters:

style - the ToStringStyle to use when outputting the objects

Returns:

a String description of the differences.