Package Summary Overview Summary

### class:SimpleScriptContext [NONE]
- All Implemented Interfaces: ScriptContext
      public class SimpleScriptContext
      extends Object
      implements ScriptContext
Simple implementation of ScriptContext. Since: 1.6

### field:writer [NONE]
- #### writer
      protected Writer writer
This is the writer to be used to output from scripts. By default, a `PrintWriter` based on `System.out` is used. Accessor methods getWriter, setWriter are used to manage this field. See Also: `System.out`, `PrintWriter`

### field:errorWriter [NONE]
- #### errorWriter
      protected Writer errorWriter
This is the writer to be used to output errors from scripts. By default, a `PrintWriter` based on `System.err` is used. Accessor methods getErrorWriter, setErrorWriter are used to manage this field. See Also: `System.err`, `PrintWriter`

### field:reader [NONE]
- #### reader
      protected Reader reader
This is the reader to be used for input from scripts. By default, a `InputStreamReader` based on `System.in` is used and default charset is used by this reader. Accessor methods getReader, setReader are used to manage this field. See Also: `System.in`, `InputStreamReader`

### field:engineScope [NONE]
- #### engineScope
      protected Bindings engineScope
This is the engine scope bindings. By default, a `SimpleBindings` is used. Accessor methods setBindings, getBindings are used to manage this field. See Also: `SimpleBindings`

### field:globalScope [NONE]
- #### globalScope
      protected Bindings globalScope
This is the global scope bindings. By default, a null value (which means no global scope) is used. Accessor methods setBindings, getBindings are used to manage this field.

### constructor:SimpleScriptContext() [NONE]
- #### SimpleScriptContext
      public SimpleScriptContext()
Create a `SimpleScriptContext`.

### method:setBindings(javax.script.Bindings, int) [NONE]
- #### setBindings
      public void setBindings(Bindings bindings,
                              int scope)
Sets a `Bindings` of attributes for the given scope. If the value of scope is `ENGINE_SCOPE` the given `Bindings` replaces the `engineScope` field. If the value of scope is `GLOBAL_SCOPE` the given `Bindings` replaces the `globalScope` field. Specified by: `setBindings` in interface `ScriptContext` Parameters: `bindings` - The `Bindings` of attributes to set. `scope` - The value of the scope in which the attributes are set. Throws: `IllegalArgumentException` - if scope is invalid. `NullPointerException` - if the value of scope is `ENGINE_SCOPE` and the specified `Bindings` is null.

### method:getAttribute(java.lang.String) [NONE]
- #### getAttribute
      public Object getAttribute(String name)
Retrieves the value of the attribute with the given name in the scope occurring earliest in the search order. The order is determined by the numeric value of the scope parameter (lowest scope values first.) Specified by: `getAttribute` in interface `ScriptContext` Parameters: `name` - The name of the the attribute to retrieve. Returns: The value of the attribute in the lowest scope for which an attribute with the given name is defined. Returns null if no attribute with the name exists in any scope. Throws: `NullPointerException` - if the name is null. `IllegalArgumentException` - if the name is empty.

### method:getAttribute(java.lang.String, int) [NONE]
- #### getAttribute
      public Object getAttribute(String name,
                                 int scope)
Gets the value of an attribute in a given scope. Specified by: `getAttribute` in interface `ScriptContext` Parameters: `name` - The name of the attribute to retrieve. `scope` - The scope in which to retrieve the attribute. Returns: The value of the attribute. Returns `null` is the name does not exist in the given scope. Throws: `IllegalArgumentException` - if the name is empty or if the value of scope is invalid. `NullPointerException` - if the name is null.

### method:removeAttribute(java.lang.String, int) [NONE]
- #### removeAttribute
      public Object removeAttribute(String name,
                                    int scope)
Remove an attribute in a given scope. Specified by: `removeAttribute` in interface `ScriptContext` Parameters: `name` - The name of the attribute to remove `scope` - The scope in which to remove the attribute Returns: The removed value. Throws: `IllegalArgumentException` - if the name is empty or if the scope is invalid. `NullPointerException` - if the name is null.

### method:setAttribute(java.lang.String, java.lang.Object, int) [NONE]
- #### setAttribute
      public void setAttribute(String name,
                               Object value,
                               int scope)
Sets the value of an attribute in a given scope. Specified by: `setAttribute` in interface `ScriptContext` Parameters: `name` - The name of the attribute to set `value` - The value of the attribute `scope` - The scope in which to set the attribute Throws: `IllegalArgumentException` - if the name is empty or if the scope is invalid. `NullPointerException` - if the name is null.

### method:getWriter() [NONE]
- #### getWriter
      public Writer getWriter()
Returns the `Writer` for scripts to use when displaying output. Specified by: `getWriter` in interface `ScriptContext` Returns: The `Writer`.

### method:getReader() [NONE]
- #### getReader
      public Reader getReader()
Returns a `Reader` to be used by the script to read input. Specified by: `getReader` in interface `ScriptContext` Returns: The `Reader`.

### method:setReader(java.io.Reader) [NONE]
- #### setReader
      public void setReader(Reader reader)
Sets the `Reader` for scripts to read input . Specified by: `setReader` in interface `ScriptContext` Parameters: `reader` - The new `Reader`.

### method:setWriter(java.io.Writer) [NONE]
- #### setWriter
      public void setWriter(Writer writer)
Sets the `Writer` for scripts to use when displaying output. Specified by: `setWriter` in interface `ScriptContext` Parameters: `writer` - The new `Writer`.

### method:getErrorWriter() [NONE]
- #### getErrorWriter
      public Writer getErrorWriter()
Returns the `Writer` used to display error output. Specified by: `getErrorWriter` in interface `ScriptContext` Returns: The `Writer`

### method:setErrorWriter(java.io.Writer) [NONE]
- #### setErrorWriter
      public void setErrorWriter(Writer writer)
Sets the `Writer` used to display error output. Specified by: `setErrorWriter` in interface `ScriptContext` Parameters: `writer` - The `Writer`.

### method:getAttributesScope(java.lang.String) [NONE]
- #### getAttributesScope
      public int getAttributesScope(String name)
Get the lowest scope in which an attribute is defined. Specified by: `getAttributesScope` in interface `ScriptContext` Parameters: `name` - Name of the attribute . Returns: The lowest scope. Returns -1 if no attribute with the given name is defined in any scope. Throws: `NullPointerException` - if name is null. `IllegalArgumentException` - if name is empty.

### method:getBindings(int) [NONE]
- #### getBindings
      public Bindings getBindings(int scope)
Returns the value of the `engineScope` field if specified scope is `ENGINE_SCOPE`. Returns the value of the `globalScope` field if the specified scope is `GLOBAL_SCOPE`. Specified by: `getBindings` in interface `ScriptContext` Parameters: `scope` - The specified scope Returns: The value of either the `engineScope` or `globalScope` field. Throws: `IllegalArgumentException` - if the value of scope is invalid.

### method:getScopes() [NONE]
- #### getScopes
      public List<Integer> getScopes()
Returns immutable `List` of all the valid values for scope in the ScriptContext. Specified by: `getScopes` in interface `ScriptContext` Returns: list of scope values