Package org.apache.commons.jexl2
Class ReadonlyContext
- java.lang.Object
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- org.apache.commons.jexl2.ReadonlyContext
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- All Implemented Interfaces:
JexlContext
public final class ReadonlyContext extends java.lang.Object implements JexlContext
A readonly context wrapper.- Since:
- 2.1
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Constructor Summary
Constructors Constructor Description ReadonlyContext(JexlContext context)
Creates a new readonly context.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
get(java.lang.String name)
Gets the value of a variable.boolean
has(java.lang.String name)
Checks whether a variable is defined in this context.void
set(java.lang.String name, java.lang.Object value)
Will throw an UnsupportedOperationException when called; the JexlEngine deals with it appropriately.
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Constructor Detail
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ReadonlyContext
public ReadonlyContext(JexlContext context)
Creates a new readonly context.- Parameters:
context
- the wrapped context
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Method Detail
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get
public java.lang.Object get(java.lang.String name)
Gets the value of a variable.- Specified by:
get
in interfaceJexlContext
- Parameters:
name
- the variable's name- Returns:
- the value
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set
public void set(java.lang.String name, java.lang.Object value)
Will throw an UnsupportedOperationException when called; the JexlEngine deals with it appropriately.- Specified by:
set
in interfaceJexlContext
- Parameters:
name
- the unused variable namevalue
- the unused variable value
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has
public boolean has(java.lang.String name)
Checks whether a variable is defined in this context.A variable may be defined with a null value; this method checks whether the value is null or if the variable is undefined.
- Specified by:
has
in interfaceJexlContext
- Parameters:
name
- the variable's name- Returns:
- true if it exists, false otherwise
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