com.android.resources

Class ResourceUrl

java.lang.Object

com.android.resources.ResourceUrl

All Implemented Interfaces:

java.io.Serializable

@Immutable
public class ResourceUrl
extends java.lang.Object
implements java.io.Serializable

A ResourceUrl represents a parsed resource url such as @string/foo or ?android:attr/bar

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ResourceUrl.UrlType

Field Summary

Fields

Modifier and Type	Field and Description
java.lang.String	name Name of resource
java.lang.String	namespace The namespace, or null if it's in the project namespace
ResourceType	type Type of resource
ResourceUrl.UrlType	urlType

Method Summary

Modifier and Type	Method and Description
static ResourceUrl	create(ResourceType type, java.lang.String name, boolean framework) Deprecated. This factory method is used where we have no way of knowing the namespace. We need to migrate every call site to the other factory method that takes a namespace.
static ResourceUrl	create(java.lang.String namespace, ResourceType type, java.lang.String name) Creates a new resource URL, representing "@namespace:type/name".
static ResourceUrl	createAttrReference(java.lang.String namespace, java.lang.String name) Creates a new resource URL, representing "namespace:name".
static ResourceUrl	createThemeReference(java.lang.String namespace, ResourceType type, java.lang.String name) Creates a new resource URL, representing "?namespace:type/name".
boolean	equals(java.lang.Object o)
java.lang.String	getQualifiedName() Returns a short string representation, which includes just the namespace (if defined in this ResourceUrl and name, separated by a colon.
int	hashCode()
boolean	hasValidName() Checks whether this resource has a valid name.
boolean	isCreate() Whether an id resource is of the form @+id rather than just @id
boolean	isFramework() If true, the resource is in the android: framework
static boolean	isNullOrEmpty(java.lang.String url) Returns if the resource url is @null, @empty or @undefined.
boolean	isTheme() Whether this is a theme resource reference
static boolean	isValidName(java.lang.String input, ResourceType type)
static ResourceUrl	parse(java.lang.String url) Returns a ResourceUrl representation of the given string, or null if it's not a valid resource reference.
static ResourceUrl	parse(java.lang.String url, boolean forceFramework) Returns a ResourceUrl representation of the given string, or null if it's not a valid resource reference.
static ResourceUrl	parseAttrReference(java.lang.String input) Returns a ResourceUrl representation of the given reference to an attr resources, most likely the contents of <item name="..." >.
static ResourceUrl	parseStyleParentReference(java.lang.String input) Returns a ResourceUrl representation of the given reference to a style's parent.
ResourceReference	resolve(ResourceNamespace contextNamespace, ResourceNamespace.Resolver resolver) Tries to resolve this ResourceUrl into a valid ResourceReference by expanding the namespace alias (or lack thereof) based on the context in which this ResourceUrl was used.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

type

@NonNull
public final ResourceType type

Type of resource

name

@NonNull
public final java.lang.String name

Name of resource

namespace

@Nullable
public final java.lang.String namespace

The namespace, or null if it's in the project namespace

urlType

@NonNull
public final ResourceUrl.UrlType urlType

Method Detail

isFramework

public boolean isFramework()

If true, the resource is in the android: framework

isCreate

public boolean isCreate()

Whether an id resource is of the form @+id rather than just @id

isTheme

public boolean isTheme()

Whether this is a theme resource reference

create

@Deprecated
public static ResourceUrl create(@NonNull
                                             ResourceType type,
                                             @NonNull
                                             java.lang.String name,
                                             boolean framework)

Deprecated. This factory method is used where we have no way of knowing the namespace. We need to migrate every call site to the other factory method that takes a namespace.

Creates a new resource URL, representing "@type/name" or "@android:type/name".

Parameters:

type - the resource type

name - the name

framework - whether it's a framework resource

See Also:

parse(String)

create

@NonNull
public static ResourceUrl create(@Nullable
                                          java.lang.String namespace,
                                          @NonNull
                                          ResourceType type,
                                          @NonNull
                                          java.lang.String name)

Creates a new resource URL, representing "@namespace:type/name".

Parameters:

namespace - the resource namespace

type - the resource type

name - the name

See Also:

parse(String)

createThemeReference

@NonNull
public static ResourceUrl createThemeReference(@Nullable
                                                        java.lang.String namespace,
                                                        @NonNull
                                                        ResourceType type,
                                                        @NonNull
                                                        java.lang.String name)

Creates a new resource URL, representing "?namespace:type/name".

Parameters:

namespace - the resource namespace

type - the resource type

name - the name

See Also:

parse(String)

createAttrReference

@NonNull
public static ResourceUrl createAttrReference(@Nullable
                                                       java.lang.String namespace,
                                                       @NonNull
                                                       java.lang.String name)

Creates a new resource URL, representing "namespace:name".

Parameters:

namespace - the resource namespace

name - the name

See Also:

parse(String)

parse

@Nullable
public static ResourceUrl parse(@NonNull
                                          java.lang.String url)

Returns a ResourceUrl representation of the given string, or null if it's not a valid resource reference. This method works only for strings of type ResourceUrl.UrlType.NORMAL, ResourceUrl.UrlType.CREATE and ResourceUrl.UrlType.THEME, see dedicated methods for parsing references to style parents and to attr resources in the name XML attribute of style items.

Parameters:

url - the resource url to be parsed

Returns:

a pair of the resource type and the resource name

parse

@Nullable
public static ResourceUrl parse(@NonNull
                                          java.lang.String url,
                                          boolean forceFramework)

Returns a ResourceUrl representation of the given string, or null if it's not a valid resource reference. This method works only for strings of type ResourceUrl.UrlType.NORMAL, ResourceUrl.UrlType.CREATE and ResourceUrl.UrlType.THEME, see dedicated methods for parsing references to style parents and to attr resources in the name XML attribute of style items.

Parameters:

url - the resource url to be parsed

forceFramework - force the returned value to be a framework resource.

TODO(namespaces): remove the forceFramework argument.

parseAttrReference

@Nullable
public static ResourceUrl parseAttrReference(@NonNull
                                                       java.lang.String input)

Returns a ResourceUrl representation of the given reference to an attr resources, most likely the contents of <item name="..." >.

parseStyleParentReference

@Nullable
public static ResourceUrl parseStyleParentReference(@NonNull
                                                              java.lang.String input)

Returns a ResourceUrl representation of the given reference to a style's parent.

isNullOrEmpty

public static boolean isNullOrEmpty(@NonNull
                                    java.lang.String url)

Returns if the resource url is @null, @empty or @undefined.

hasValidName

public boolean hasValidName()

Checks whether this resource has a valid name. Used when parsing data that isn't necessarily known to be a valid resource; for example, "?attr/hello world"

isValidName

public static boolean isValidName(@NonNull
                                  java.lang.String input,
                                  @NonNull
                                  ResourceType type)

resolve

@Nullable
public ResourceReference resolve(@NonNull
                                           ResourceNamespace contextNamespace,
                                           @NonNull
                                           ResourceNamespace.Resolver resolver)

Tries to resolve this ResourceUrl into a valid ResourceReference by expanding the namespace alias (or lack thereof) based on the context in which this ResourceUrl was used.

Parameters:

contextNamespace - aapt namespace of the module in which this URL was used

resolver - logic for expanding namespaces aliases, most likely by walking up the XML tree.

See Also:

ResourceNamespace.fromNamespacePrefix(String, ResourceNamespace, ResourceNamespace.Resolver)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getQualifiedName

@NonNull
public java.lang.String getQualifiedName()

Returns a short string representation, which includes just the namespace (if defined in this ResourceUrl and name, separated by a colon. For example ResourceUrl.parse("@android:style/Theme").getQualifiedName() returns "android:Theme" and ResourceUrl.parse("?myColor").getQualifiedName() returns "myColor".

This is used when the type is implicit, e.g. when specifying attribute for a style item or a parent for a style.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object