com.google.common.base

Class Joiner.MapJoiner

java.lang.Object

com.google.common.base.Joiner.MapJoiner

Enclosing class:

Joiner

public static final class Joiner.MapJoiner
extends Object

An object that joins map entries in the same manner as Joiner joins iterables and arrays. Like Joiner, it is thread-safe and immutable.

In addition to operating on Map instances, MapJoiner can operate on Multimap entries in two distinct modes:

• To output a separate entry for each key-value pair, pass multimap.entries() to a MapJoiner method that accepts entries as input, and receive output of the form key1=A&key1=B&key2=C.
• To output a single entry for each key, pass multimap.asMap() to a MapJoiner method that accepts a map as input, and receive output of the form key1=[A, B]&key2=C.

Since:

2.0

Method Summary

Modifier and Type	Method and Description
<A extends Appendable> A	appendTo(A appendable, Iterable<? extends Map.Entry<?,?>> entries) Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to appendable.
<A extends Appendable> A	appendTo(A appendable, Iterator<? extends Map.Entry<?,?>> parts) Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to appendable.
<A extends Appendable> A	appendTo(A appendable, Map<?,?> map) Appends the string representation of each entry of map, using the previously configured separator and key-value separator, to appendable.
StringBuilder	appendTo(StringBuilder builder, Iterable<? extends Map.Entry<?,?>> entries) Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to builder.
StringBuilder	appendTo(StringBuilder builder, Iterator<? extends Map.Entry<?,?>> entries) Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to builder.
StringBuilder	appendTo(StringBuilder builder, Map<?,?> map) Appends the string representation of each entry of map, using the previously configured separator and key-value separator, to builder.
String	join(Iterable<? extends Map.Entry<?,?>> entries) Returns a string containing the string representation of each entry in entries, using the previously configured separator and key-value separator.
String	join(Iterator<? extends Map.Entry<?,?>> entries) Returns a string containing the string representation of each entry in entries, using the previously configured separator and key-value separator.
String	join(Map<?,?> map) Returns a string containing the string representation of each entry of map, using the previously configured separator and key-value separator.
Joiner.MapJoiner	useForNull(String nullText) Returns a map joiner with the same behavior as this one, except automatically substituting nullText for any provided null keys or values.

Methods inherited from class java.lang.Object

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

Method Detail

appendTo

@CanIgnoreReturnValue
public <A extends Appendable> A appendTo(A appendable,
                                                               Map<?,?> map)
                                                        throws IOException

Appends the string representation of each entry of map, using the previously configured separator and key-value separator, to appendable.

Throws:

IOException

appendTo

@CanIgnoreReturnValue
public StringBuilder appendTo(StringBuilder builder,
                                                    Map<?,?> map)

Appends the string representation of each entry of map, using the previously configured separator and key-value separator, to builder. Identical to appendTo(Appendable, Map), except that it does not throw IOException.

join

public String join(Map<?,?> map)

Returns a string containing the string representation of each entry of map, using the previously configured separator and key-value separator.

appendTo

@Beta
 @CanIgnoreReturnValue
public <A extends Appendable> A appendTo(A appendable,
                                                                      Iterable<? extends Map.Entry<?,?>> entries)
                                                               throws IOException

Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to appendable.

Throws:

IOException

Since:

10.0

appendTo

@Beta
 @CanIgnoreReturnValue
public <A extends Appendable> A appendTo(A appendable,
                                                                      Iterator<? extends Map.Entry<?,?>> parts)
                                                               throws IOException

Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to appendable.

Throws:

IOException

Since:

11.0

appendTo

@Beta
 @CanIgnoreReturnValue
public StringBuilder appendTo(StringBuilder builder,
                                                           Iterable<? extends Map.Entry<?,?>> entries)

Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to builder. Identical to appendTo(Appendable, Iterable), except that it does not throw IOException.

Since:

10.0

appendTo

@Beta
 @CanIgnoreReturnValue
public StringBuilder appendTo(StringBuilder builder,
                                                           Iterator<? extends Map.Entry<?,?>> entries)

Appends the string representation of each entry in entries, using the previously configured separator and key-value separator, to builder. Identical to appendTo(Appendable, Iterable), except that it does not throw IOException.

Since:

11.0

join

@Beta
public String join(Iterable<? extends Map.Entry<?,?>> entries)

Returns a string containing the string representation of each entry in entries, using the previously configured separator and key-value separator.

Since:

10.0

join

@Beta
public String join(Iterator<? extends Map.Entry<?,?>> entries)

Returns a string containing the string representation of each entry in entries, using the previously configured separator and key-value separator.

Since:

11.0

useForNull

public Joiner.MapJoiner useForNull(String nullText)

Returns a map joiner with the same behavior as this one, except automatically substituting nullText for any provided null keys or values.