java.lang.Object
- com.osohq.oso.Host

All Implemented Interfaces:: Cloneable

public class Host
extends Object
implements Cloneable

Field Summary

Fields
Modifier and Type Field Description

protected boolean acceptExpression

Constructor Summary

Constructors
Constructor Description

Host(Ffi.Polar polarPtr)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`cacheClass(Class<?> cls, String name)`	Store a Java class in the cache by name.
`Long`	`cacheInstance(Object instance, Long id)`	Cache an instance of a Java class.
`Host`	`clone()`
`Class<?>`	`getClass(String name)`	Get a registered Java class.
`Object`	`getInstance(long instanceId)`	Get a cached Java instance.
`boolean`	`hasInstance(long instanceId)`	Determine if a Java instance has been cached.
`boolean`	`isa(org.json.JSONObject instance, String classTag)`	Check if a Java instance is an instance of a class.
`boolean`	`isSubclass(String leftTag, String rightTag)`	Return true if left is a subclass (or the same class) as right.
`Object`	`makeInstance(String className, List<Object> initargs, long id)`	Make an instance of a Java class from a `List<Object>` of fields.
`boolean`	`operator(String op, List<Object> args)`
`HashMap<String,Object>`	`polarDictToJava(org.json.JSONObject dict)`	Convert a JSONified Polar dictionary to a Java Map
`List<Object>`	`polarListToJava(org.json.JSONArray list)`	Convert a JSONified Polar List to a Java List
`void`	`registerMros()`	Register a list of base classes (MRO list) for all registered classes.
`protected void`	`setAcceptExpression(boolean acceptExpression)`
`boolean`	`subspecializer(long instanceId, String leftTag, String rightTag)`	Check if a class specializer is more specific than another class specializer.
`Object`	`toJava(org.json.JSONObject term)`	Turn a Polar term passed across the FFI boundary into a Java Object.
`org.json.JSONObject`	`toPolarTerm(Object value)`	Convert Java Objects to Polar (JSON) terms.

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- acceptExpression
```
protected boolean acceptExpression
```

Constructor Detail
- Host
```
public Host(Ffi.Polar polarPtr)
```

Method Detail

clone
```
public Host clone()
```
Overrides:

clone in class Object

setAcceptExpression

protected void setAcceptExpression(boolean acceptExpression)

getClass

public Class<?> getClass(String name)
                  throws Exceptions.UnregisteredClassError

Get a registered Java class.

Throws:: Exceptions.UnregisteredClassError

cacheClass
```
public String cacheClass(Class<?> cls,
                         String name)
                  throws Exceptions.DuplicateClassAliasError
```
Store a Java class in the cache by name.

Parameters:

name - The name used to reference the class from within Polar.

Throws:

Exceptions.DuplicateClassAliasError - If the name is already registered.

registerMros
```
public void registerMros()
```
Register a list of base classes (MRO list) for all registered classes. The list is in method resolution order (MRO), meaning the superclasses are ordered from most to least specific.

getInstance

public Object getInstance(long instanceId)
                   throws Exceptions.UnregisteredInstanceError

Get a cached Java instance.

Throws:: Exceptions.UnregisteredInstanceError

hasInstance
```
public boolean hasInstance(long instanceId)
```
Determine if a Java instance has been cached.

cacheInstance

public Long cacheInstance(Object instance,
                          Long id)
                   throws Exceptions.OsoException

Cache an instance of a Java class.

Throws:: Exceptions.OsoException

makeInstance

public Object makeInstance(String className,
                           List<Object> initargs,
                           long id)
                    throws Exceptions.OsoException

Make an instance of a Java class from a List<Object> of fields.

Throws:: Exceptions.OsoException

subspecializer

public boolean subspecializer(long instanceId,
                              String leftTag,
                              String rightTag)
                       throws Exceptions.UnregisteredClassError,
                              Exceptions.UnregisteredInstanceError

Check if a class specializer is more specific than another class specializer.

Throws:: Exceptions.UnregisteredClassError; Exceptions.UnregisteredInstanceError

isa

public boolean isa(org.json.JSONObject instance,
                   String classTag)
            throws Exceptions.UnregisteredClassError,
                   Exceptions.UnregisteredInstanceError,
                   Exceptions.UnexpectedPolarTypeError,
                   Exceptions.OsoException

Check if a Java instance is an instance of a class.

Throws:: Exceptions.UnregisteredClassError; Exceptions.UnregisteredInstanceError; Exceptions.UnexpectedPolarTypeError; Exceptions.OsoException

isSubclass

public boolean isSubclass(String leftTag,
                          String rightTag)

Return true if left is a subclass (or the same class) as right.

operator

public boolean operator(String op,
                        List<Object> args)
                 throws Exceptions.OsoException

Throws:: Exceptions.OsoException

toPolarTerm

public org.json.JSONObject toPolarTerm(Object value)
                                throws Exceptions.OsoException

Convert Java Objects to Polar (JSON) terms.

Throws:: Exceptions.OsoException

toJava

public Object toJava(org.json.JSONObject term)
              throws Exceptions.UnregisteredInstanceError,
                     Exceptions.UnexpectedPolarTypeError,
                     Exceptions.OsoException

Turn a Polar term passed across the FFI boundary into a Java Object.

Throws:: Exceptions.UnregisteredInstanceError; Exceptions.UnexpectedPolarTypeError; Exceptions.OsoException

polarDictToJava

public HashMap<String,Object> polarDictToJava(org.json.JSONObject dict)
                                             throws Exceptions.UnregisteredInstanceError,
                                                    Exceptions.UnexpectedPolarTypeError,
                                                    Exceptions.OsoException

Convert a JSONified Polar dictionary to a Java Map

Throws:: Exceptions.UnregisteredInstanceError; Exceptions.UnexpectedPolarTypeError; Exceptions.OsoException

polarListToJava

public List<Object> polarListToJava(org.json.JSONArray list)
                             throws Exceptions.UnregisteredInstanceError,
                                    Exceptions.UnexpectedPolarTypeError,
                                    Exceptions.OsoException

Convert a JSONified Polar List to a Java List

Throws:: Exceptions.UnregisteredInstanceError; Exceptions.UnexpectedPolarTypeError; Exceptions.OsoException

Class Host

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

acceptExpression

Constructor Detail

Host