Added in [API level 8](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Protected Ctors](https://developer.android.com/reference/javax/xml/validation/Schema#proctors) \| [Methods](https://developer.android.com/reference/javax/xml/validation/Schema#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/javax/xml/validation/Schema#inhmethods)

# Schema

` public abstract class Schema `   
` extends https://developer.android.com/reference/java/lang/Object ` ` `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | javax.xml.validation.Schema |

<br />

*** ** * ** ***

Immutable in-memory representation of grammar.

This object represents a set of constraints that can be checked/ enforced against an XML document.

A `https://developer.android.com/reference/javax/xml/validation/Schema` object is thread safe and applications are encouraged to share it across many parsers in many threads.

A `https://developer.android.com/reference/javax/xml/validation/Schema` object is immutable in the sense that it shouldn't change the set of constraints once it is created. In other words, if an application validates the same document twice against the same `https://developer.android.com/reference/javax/xml/validation/Schema`, it must always produce the same result.

A `https://developer.android.com/reference/javax/xml/validation/Schema` object is usually created from `https://developer.android.com/reference/javax/xml/validation/SchemaFactory`.

Two kinds of validators can be created from a `https://developer.android.com/reference/javax/xml/validation/Schema` object. One is `https://developer.android.com/reference/javax/xml/validation/Validator`, which provides highly-level validation operations that cover typical use cases. The other is `https://developer.android.com/reference/javax/xml/validation/ValidatorHandler`, which works on top of SAX for better modularity.

This specification does not refine the `https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)` method. In other words, if you parse the same schema twice, you may still get `!schemaA.equals(schemaB)`.
**See also:**

- [XML Schema Part 1: Structures](http://www.w3.org/TR/xmlschema-1/)
- [Extensible Markup Language (XML) 1.1](http://www.w3.org/TR/xml11/)
- [Extensible Markup Language (XML) 1.0 (Second Edition)](http://www.w3.org/TR/REC-xml)

## Summary

| ### Protected constructors ||
|---|---|
| ` https://developer.android.com/reference/javax/xml/validation/Schema#Schema()() ` Constructor for the derived class. |

| ### Public methods ||
|---|---|
| ` abstract https://developer.android.com/reference/javax/xml/validation/Validator` | ` https://developer.android.com/reference/javax/xml/validation/Schema#newValidator()() ` Creates a new `https://developer.android.com/reference/javax/xml/validation/Validator` for this `https://developer.android.com/reference/javax/xml/validation/Schema`. |
| ` abstract https://developer.android.com/reference/javax/xml/validation/ValidatorHandler` | ` https://developer.android.com/reference/javax/xml/validation/Schema#newValidatorHandler()() ` Creates a new `https://developer.android.com/reference/javax/xml/validation/ValidatorHandler` for this `https://developer.android.com/reference/javax/xml/validation/Schema`. |

### Inherited methods

From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` https://developer.android.com/reference/java/lang/Object#finalize()() `

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
` final https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.

## Protected constructors

### Schema

Added in [API level 8](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
protected Schema ()
```

Constructor for the derived class.

The constructor does nothing.

<br />

## Public methods

### newValidator

Added in [API level 8](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract Validator newValidator ()
```

Creates a new `https://developer.android.com/reference/javax/xml/validation/Validator` for this `https://developer.android.com/reference/javax/xml/validation/Schema`.

A validator enforces/checks the set of constraints this object represents.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/javax/xml/validation/Validator` | Always return a non-null valid object. <br /> |

### newValidatorHandler

Added in [API level 8](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ValidatorHandler newValidatorHandler ()
```

Creates a new `https://developer.android.com/reference/javax/xml/validation/ValidatorHandler` for this `https://developer.android.com/reference/javax/xml/validation/Schema`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/javax/xml/validation/ValidatorHandler` | Always return a non-null valid object. <br /> |