GenericDocument


public class GenericDocument
extends Object

java.lang.Object
   ↳ android.app.appsearch.GenericDocument


Represents a document unit.

Documents contain structured data conforming to their AppSearchSchema type. Each document is uniquely identified by a namespace and a String ID within that namespace.

Documents are constructed by using the GenericDocument.Builder.

Summary

Nested classes

class GenericDocument.Builder<BuilderType extends GenericDocument.Builder<BuilderType>>

The builder class for GenericDocument

Protected constructors

GenericDocument(GenericDocument document)

Creates a new GenericDocument from an existing instance.

Public methods

boolean equals(Object other)

Indicates whether some other object is "equal to" this one.

long getCreationTimestampMillis()

Returns the creation timestamp of the GenericDocument, in milliseconds.

String getId()

Returns the unique identifier of the GenericDocument.

static int getMaxIndexedProperties()

The maximum number of indexed properties a document can have.

String getNamespace()

Returns the namespace of the GenericDocument.

Object getProperty(String path)

Retrieves the property value with the given path as Object.

boolean getPropertyBoolean(String path)

Retrieves a boolean property by path.

boolean[] getPropertyBooleanArray(String path)

Retrieves a repeated boolean property by path.

byte[] getPropertyBytes(String path)

Retrieves a byte[] property by path.

byte[][] getPropertyBytesArray(String path)

Retrieves a byte[][] property by path.

GenericDocument getPropertyDocument(String path)

Retrieves a GenericDocument property by path.

GenericDocument[] getPropertyDocumentArray(String path)

Retrieves a repeated GenericDocument property by path.

double getPropertyDouble(String path)

Retrieves a double property by path.

double[] getPropertyDoubleArray(String path)

Retrieves a repeated double property by path.

long getPropertyLong(String path)

Retrieves a long property by path.

long[] getPropertyLongArray(String path)

Retrieves a repeated long[] property by path.

Set<String> getPropertyNames()

Returns the names of all properties defined in this document.

String getPropertyString(String path)

Retrieves a String property by path.

String[] getPropertyStringArray(String path)

Retrieves a repeated String property by path.

String getSchemaType()

Returns the AppSearchSchema type of the GenericDocument.

int getScore()

Returns the score of the GenericDocument.

long getTtlMillis()

Returns the TTL (time-to-live) of the GenericDocument, in milliseconds.

int hashCode()

Returns a hash code value for the object.

String toString()

Returns a string representation of the object.

Inherited methods

Protected constructors

GenericDocument

Added in API level 31
protected GenericDocument (GenericDocument document)

Creates a new GenericDocument from an existing instance.

This method should be only used by constructor of a subclass.

Parameters
document GenericDocument: This value cannot be null.

Public methods

equals

Added in API level 31
public boolean equals (Object other)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
other Object: This value may be null.

Returns
boolean true if this object is the same as the obj argument; false otherwise.

getCreationTimestampMillis

Added in API level 31
public long getCreationTimestampMillis ()

Returns the creation timestamp of the GenericDocument, in milliseconds.

The value is in the System#currentTimeMillis time base.
Value is a non-negative timestamp measured as the number of milliseconds since 1970-01-01T00:00:00Z.

Returns
long Value is a non-negative timestamp measured as the number of milliseconds since 1970-01-01T00:00:00Z.

getId

Added in API level 31
public String getId ()

Returns the unique identifier of the GenericDocument.

Returns
String This value cannot be null.

getMaxIndexedProperties

Added in API level 31
public static int getMaxIndexedProperties ()

The maximum number of indexed properties a document can have.

Indexed properties are properties which are strings where the AppSearchSchema.StringPropertyConfig.getIndexingType() value is anything other than AppSearchSchema.StringPropertyConfig.INDEXING_TYPE_NONE, as well as long properties where the AppSearchSchema.LongPropertyConfig#getIndexingType value is AppSearchSchema.LongPropertyConfig.INDEXING_TYPE_RANGE.

Returns
int

getNamespace

Added in API level 31
public String getNamespace ()

Returns the namespace of the GenericDocument.

Returns
String This value cannot be null.

getProperty

Added in API level 31
public Object getProperty (String path)

Retrieves the property value with the given path as Object.

A path can be a simple property name, such as those returned by getPropertyNames(). It may also be a dot-delimited path through the nested document hierarchy, with nested GenericDocument properties accessed via '.' and repeated properties optionally indexed into via [n].

For example, given the following GenericDocument:

     (Message) {
         from: "sender@example.com"
         to: [{
             name: "Albert Einstein"
             email: "einstein@example.com"
           }, {
             name: "Marie Curie"
             email: "curie@example.com"
           }]
         tags: ["important", "inbox"]
         subject: "Hello"
     }
 

Here are some example paths and their results:

  • "from" returns "sender@example.com" as a String array with one element
  • "to" returns the two nested documents containing contact information as a GenericDocument array with two elements
  • "to[1]" returns the second nested document containing Marie Curie's contact information as a GenericDocument array with one element
  • "to[1].email" returns "curie@example.com"
  • "to[100].email" returns null as this particular document does not have that many elements in its "to" array.
  • "to.email" aggregates emails across all nested documents that have them, returning ["einstein@example.com", "curie@example.com"] as a String array with two elements.

If you know the expected type of the property you are retrieving, it is recommended to use one of the typed versions of this method instead, such as getPropertyString(String) or getPropertyStringArray(String).

If the property was assigned as an empty array using one of the Builder#setProperty functions, this method will return an empty array. If no such property exists at all, this method returns null.

Note: If the property is an empty GenericDocument[] or byte[][], this method will return a null value in versions of Android prior to Android T. Starting in Android T it will return an empty array if the property has been set as an empty array, matching the behavior of other property types.

Parameters
path String: The path to look for. This value cannot be null.

Returns
Object The entry with the given path as an object or null if there is no such path. The returned object will be one of the following types: String[], long[], double[], boolean[], byte[][], GenericDocument[].

getPropertyBoolean

Added in API level 31
public boolean getPropertyBoolean (String path)

Retrieves a boolean property by path.

See getProperty(String) for a detailed description of the path syntax.

Parameters
path String: The path to look for. This value cannot be null.

Returns
boolean The first boolean associated with the given path or default value false if there is no such value or the value is of a different type.

getPropertyBooleanArray

Added in API level 31
public boolean[] getPropertyBooleanArray (String path)

Retrieves a repeated boolean property by path.

See getProperty(String) for a detailed description of the path syntax.

If the property has not been set via Builder#setPropertyBoolean, this method returns null.

If it has been set via Builder#setPropertyBoolean to an empty boolean[], this method returns an empty boolean[].

Parameters
path String: The path to look for. This value cannot be null.

Returns
boolean[] The boolean[] associated with the given path, or null if no value is set or the value is of a different type.

getPropertyBytes

Added in API level 31
public byte[] getPropertyBytes (String path)

Retrieves a byte[] property by path.

See getProperty(String) for a detailed description of the path syntax.

Parameters
path String: The path to look for. This value cannot be null.

Returns
byte[] The first byte[] associated with the given path or null if there is no such value or the value is of a different type.

getPropertyBytesArray

Added in API level 31
public byte[][] getPropertyBytesArray (String path)

Retrieves a byte[][] property by path.

See getProperty(String) for a detailed description of the path syntax.

If the property has not been set via Builder#setPropertyBytes, this method returns null.

If it has been set via Builder#setPropertyBytes to an empty byte[][], this method returns an empty byte[][] starting in Android T and null in earlier versions of Android.

Parameters
path String: The path to look for. This value cannot be null.

Returns
byte[][] The byte[][] associated with the given path, or null if no value is set or the value is of a different type.

getPropertyDocument

Added in API level 31
public GenericDocument getPropertyDocument (String path)

Retrieves a GenericDocument property by path.

See getProperty(String) for a detailed description of the path syntax.

Parameters
path String: The path to look for. This value cannot be null.

Returns
GenericDocument The first GenericDocument associated with the given path or null if there is no such value or the value is of a different type.

getPropertyDocumentArray

Added in API level 31
public GenericDocument[] getPropertyDocumentArray (String path)

Retrieves a repeated GenericDocument property by path.

See getProperty(String) for a detailed description of the path syntax.

If the property has not been set via Builder#setPropertyDocument, this method returns null.

If it has been set via Builder#setPropertyDocument to an empty GenericDocument[], this method returns an empty GenericDocument[] starting in Android T and null in earlier versions of Android.

Parameters
path String: The path to look for. This value cannot be null.

Returns
GenericDocument[] The GenericDocument[] associated with the given path, or null if no value is set or the value is of a different type.

getPropertyDouble

Added in API level 31
public double getPropertyDouble (String path)

Retrieves a double property by path.

See getProperty(String) for a detailed description of the path syntax.

Parameters
path String: The path to look for. This value cannot be null.

Returns
double The first double associated with the given path or default value 0.0 if there is no such value or the value is of a different type.

getPropertyDoubleArray

Added in API level 31
public double[] getPropertyDoubleArray (String path)

Retrieves a repeated double property by path.

See getProperty(String) for a detailed description of the path syntax.

If the property has not been set via Builder#setPropertyDouble, this method returns null.

If it has been set via Builder#setPropertyDouble to an empty double[], this method returns an empty double[].

Parameters
path String: The path to look for. This value cannot be null.

Returns
double[] The double[] associated with the given path, or null if no value is set or the value is of a different type.

getPropertyLong

Added in API level 31
public long getPropertyLong (String path)

Retrieves a long property by path.

See getProperty(String) for a detailed description of the path syntax.

Parameters
path String: The path to look for. This value cannot be null.

Returns
long The first long associated with the given path or default value 0 if there is no such value or the value is of a different type.

getPropertyLongArray

Added in API level 31
public long[] getPropertyLongArray (String path)

Retrieves a repeated long[] property by path.

See getProperty(String) for a detailed description of the path syntax.

If the property has not been set via Builder#setPropertyLong, this method returns null.

If it has been set via Builder#setPropertyLong to an empty long[], this method returns an empty long[].

Parameters
path String: The path to look for. This value cannot be null.

Returns
long[] The long[] associated with the given path, or null if no value is set or the value is of a different type.

getPropertyNames

Added in API level 31
public Set<String> getPropertyNames ()

Returns the names of all properties defined in this document.

Returns
Set<String> This value cannot be null.

getPropertyString

Added in API level 31
public String getPropertyString (String path)

Retrieves a String property by path.

See getProperty(String) for a detailed description of the path syntax.

Parameters
path String: The path to look for. This value cannot be null.

Returns
String The first String associated with the given path or null if there is no such value or the value is of a different type.

getPropertyStringArray

Added in API level 31
public String[] getPropertyStringArray (String path)

Retrieves a repeated String property by path.

See getProperty(String) for a detailed description of the path syntax.

If the property has not been set via Builder#setPropertyString, this method returns null.

If it has been set via Builder#setPropertyString to an empty String[], this method returns an empty String[].

Parameters
path String: The path to look for. This value cannot be null.

Returns
String[] The String[] associated with the given path, or null if no value is set or the value is of a different type.

getSchemaType

Added in API level 31
public String getSchemaType ()

Returns the AppSearchSchema type of the GenericDocument.

Returns
String This value cannot be null.

getScore

Added in API level 31
public int getScore ()

Returns the score of the GenericDocument.

The score is a query-independent measure of the document's quality, relative to other GenericDocument objects of the same AppSearchSchema type.

Results may be sorted by score using SearchSpec.Builder#setRankingStrategy. Documents with higher scores are considered better than documents with lower scores.

Any non-negative integer can be used a score.

Returns
int

getTtlMillis

Added in API level 31
public long getTtlMillis ()

Returns the TTL (time-to-live) of the GenericDocument, in milliseconds.

The TTL is measured against getCreationTimestampMillis(). At the timestamp of creationTimestampMillis + ttlMillis, measured in the System#currentTimeMillis time base, the document will be auto-deleted.

The default value is 0, which means the document is permanent and won't be auto-deleted until the app is uninstalled or AppSearchSession#remove is called.

Returns
long

hashCode

Added in API level 31
public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns
int a hash code value for this object.

toString

Added in API level 31
public String toString ()

Returns a string representation of the object.

Returns
String This value cannot be null.