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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.

See also:

Summary

Nested classes

class GenericDocument.Builder<BuilderType extends Builder>

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

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

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.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Parameters
other Object: This value may be null.
Returns
boolean true if this object is the same as the obj argument; false otherwise.

getCreationTimestampMillis

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

public String getId ()

Returns the unique identifier of the GenericDocument.

Returns
String This value cannot be null.

getMaxIndexedProperties

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.

Returns
int

getNamespace

public String getNamespace ()

Returns the namespace of the GenericDocument.

Returns
String This value cannot be null.

getProperty

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).

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

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

public boolean[] getPropertyBooleanArray (String path)

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

getPropertyBytes

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

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

getPropertyDocument

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

public GenericDocument[] getPropertyDocumentArray (String path)

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

getPropertyDouble

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

public double[] getPropertyDoubleArray (String path)

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

getPropertyLong

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

public long[] getPropertyLongArray (String path)

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

getPropertyNames

public Set<String> getPropertyNames ()

Returns the names of all properties defined in this document.

Returns
Set<String> This value cannot be null.

getPropertyString

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

public String[] getPropertyStringArray (String path)

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

getSchemaType

public String getSchemaType ()

Returns the AppSearchSchema type of the GenericDocument.

Returns
String This value cannot be null.

getScore

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

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

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(Object) 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(java.lang.Object) 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.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
int a hash code value for this object.

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: 

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
String This value cannot be null.
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