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java.lang.Objectjavax.script.AbstractScriptEngine
public abstract class AbstractScriptEngine
Provides a standard implementation for various versions of the eval() methods.
Stores the ScriptContext, and provides access to the Bindings stored in the context.
The class is not synchronized.
The default context - SimpleScriptContext - is not synchronized either.
Sub-classes must provide synchronization if necessary.
See Javadoc of Java Scripting API
| Field Summary | |
|---|---|
protected ScriptContext |
context
The default ScriptContext of this AbstractScriptEngine |
| Fields inherited from interface javax.script.ScriptEngine |
|---|
ARGV, ENGINE, ENGINE_VERSION, FILENAME, LANGUAGE, LANGUAGE_VERSION, NAME |
| Constructor Summary | |
|---|---|
AbstractScriptEngine()
Constructs a ScriptEngine using an uninitialized SimpleScriptContext. |
|
AbstractScriptEngine(Bindings bindings)
Constructs a ScriptEngine using the specified Bindings as its ENGINE_SCOPE. |
|
| Method Summary | |
|---|---|
java.lang.Object |
eval(java.io.Reader reader)
Evaluates a script obtained using the specified reader as the script source. |
java.lang.Object |
eval(java.io.Reader reader,
Bindings bindings)
Evaluates a script obtained using a reader as the script source and using the specified namespace as the ENGINE_SCOPE. |
java.lang.Object |
eval(java.lang.String script)
Evaluates a script contained in a String and returns the resultant object. |
java.lang.Object |
eval(java.lang.String script,
Bindings bindings)
Evaluates a piece of script using the specified namespace as the ENGINE_SCOPE. |
java.lang.Object |
get(java.lang.String key)
Retrieves the value which is associated with the specified key in the state of the ScriptEngine. |
Bindings |
getBindings(int scope)
Retrieves a reference to the associated bindings for the specified scope. |
ScriptContext |
getContext()
Returns the default ScriptContext of the ScriptEngine whose Bindings, Readers and Writers are used for script executions when no ScriptContext is specified. |
protected ScriptContext |
getScriptContext(Bindings bindings)
Returns a SimpleScriptContext which:
uses the specified Bindings as the ScriptEngine#ENGINE_SCOPE
has the same GLOBAL_SCOPE Bindings as the current context
uses the same Reader, Writer and Error Writer as the current context
|
void |
put(java.lang.String key,
java.lang.Object value)
Associates a key and a value in the ScriptEngine ENGINE_SCOPE bindings. |
void |
setBindings(Bindings bindings,
int scope)
Associates the specified bindings with the specified scope. |
void |
setContext(ScriptContext context)
Sets the default ScriptContext of the ScriptEngine whose Bindings, Readers and Writers are used for script executions when no ScriptContext is specified. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface javax.script.ScriptEngine |
|---|
createBindings, eval, eval, getFactory |
| Field Detail |
|---|
protected ScriptContext context
| Constructor Detail |
|---|
public AbstractScriptEngine()
public AbstractScriptEngine(Bindings bindings)
bindings - the Bindings to be used as the ENGINE_SCOPE
java.lang.NullPointerException - if the parameter is null| Method Detail |
|---|
public java.lang.Object eval(java.io.Reader reader)
throws ScriptException
eval in interface ScriptEnginereader - the source of the script
ScriptException - if an error occurs
public java.lang.Object eval(java.io.Reader reader,
Bindings bindings)
throws ScriptException
eval in interface ScriptEnginereader - the script source used to obtained the scriptbindings - the bindings to be used as ENGINE_SCOPE
ScriptException - if an error occurs
public java.lang.Object eval(java.lang.String script)
throws ScriptException
eval in interface ScriptEnginescript - the String representation of the script
ScriptException - if an error occurs
public java.lang.Object eval(java.lang.String script,
Bindings bindings)
throws ScriptException
eval in interface ScriptEnginescript - the String representation of the scriptbindings - the bindings to be used as the ENGINE_SCOPE
ScriptException - if an error occurspublic java.lang.Object get(java.lang.String key)
get in interface ScriptEnginekey - the key associated with value.
public Bindings getBindings(int scope)
getBindings in interface ScriptEnginescope - the specified scope
protected ScriptContext getScriptContext(Bindings bindings)
SimpleScriptContext which:
Bindings as the ScriptEngine#ENGINE_SCOPE
bindings - the bindings to be associated with ENGINE_SCOPE
java.lang.NullPointerException - if bindings is null
public void put(java.lang.String key,
java.lang.Object value)
put in interface ScriptEnginekey - the specified key associated with the valuevalue - value which is to be associated with the
specified key
public void setBindings(Bindings bindings,
int scope)
setBindings in interface ScriptEnginebindings - bindings to be associated with the specified scopescope - scope which the bindings should be associated withpublic ScriptContext getContext()
getContext in interface ScriptEnginepublic void setContext(ScriptContext context)
setContext in interface ScriptEnginecontext - scriptContext that will replace the default ScriptContext in the ScriptEngine.
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