| javax.el.ValueExpression
 de.odysseus.el.TreeValueExpression
| Method Summary | |
| public void | dump(PrintWriter writer)
Print the parse tree. | | public boolean | equals(Object obj)
Expressions are compared using the concept of a structural id:
variable and function names are anonymized such that two expressions with
same tree structure will also have the same structural id and vice versa. | | public Class | getExpectedType()
| | public String | getExpressionString()
| | public Class | getType(ELContext context)
Evaluates the expression as an lvalue and answers the result type.
Parameters:
context - used to resolve properties (base.property and base[property])and to determine the result from the last base/property pair lvalue evaluation type or null for rvalue expressions
throws:
ELException - if evaluation fails (e.g. | | public Object | getValue(ELContext context)
Evaluates the expression as an rvalue and answers the result.
Parameters:
context - used to resolve properties (base.property and base[property])and to determine the result from the last base/property pair rvalue evaluation result
throws:
ELException - if evaluation fails (e.g. | | public int | hashCode()
| | public boolean | isDeferred()
| | public boolean | isLeftValue()
Answer true if this could be used as an lvalue. | | public boolean | isLiteralText()
| | public boolean | isReadOnly(ELContext context)
Evaluates the expression as an lvalue and determines if
TreeValueExpression.setValue(ELContext,Object) will always fail.
Parameters:
context - used to resolve properties (base.property and base[property])and to determine the result from the last base/property pair true if TreeValueExpression.setValue(ELContext,Object) always fails.
throws:
ELException - if evaluation fails (e.g. | | public void | setValue(ELContext context, Object value)
Evaluates the expression as an lvalue and assigns the given value.
Parameters:
context - used to resolve properties (base.property and base[property])and to perform the assignment to the last base/property pair
throws:
ELException - if evaluation fails (e.g. | | public String | toString()
|
| TreeValueExpression | | public TreeValueExpression(TreeStore store, FunctionMapper functions, VariableMapper variables, String expr, Class type)(Code) | | Create a new value expression.
Parameters:
store - used to get the parse tree from.
Parameters:
functions - the function mapper used to bind functions
Parameters:
variables - the variable mapper used to bind variables
Parameters:
expr - the expression string
Parameters:
type - the expected type (may be null) |
| dump | | public void dump(PrintWriter writer)(Code) | | Print the parse tree.
Parameters:
writer - |
| equals | | public boolean equals(Object obj)(Code) | | Expressions are compared using the concept of a structural id:
variable and function names are anonymized such that two expressions with
same tree structure will also have the same structural id and vice versa.
Two value expressions are equal if
- their structural id's are equal
- their bindings are equal
- their expected types are equal
|
| getExpressionString | | public String getExpressionString()(Code) | | |
| getType | | public Class getType(ELContext context) throws ELException(Code) | | Evaluates the expression as an lvalue and answers the result type.
Parameters:
context - used to resolve properties (base.property and base[property])and to determine the result from the last base/property pair lvalue evaluation type or null for rvalue expressions
throws:
ELException - if evaluation fails (e.g. property not found, type conversion failed, ...) |
| getValue | | public Object getValue(ELContext context) throws ELException(Code) | | Evaluates the expression as an rvalue and answers the result.
Parameters:
context - used to resolve properties (base.property and base[property])and to determine the result from the last base/property pair rvalue evaluation result
throws:
ELException - if evaluation fails (e.g. property not found, type conversion failed, ...) |
| hashCode | | public int hashCode()(Code) | | |
| isDeferred | | public boolean isDeferred()(Code) | | Answer true if this is a deferred expression (containing
sub-expressions starting with #{)
|
| isLeftValue | | public boolean isLeftValue()(Code) | | Answer true if this could be used as an lvalue.
This is the case for eval expressions consisting of a simple identifier or
a nonliteral prefix, followed by a sequence of property operators (. or [])
|
| isLiteralText | | public boolean isLiteralText()(Code) | | true if this is a literal text expression |
| setValue | | public void setValue(ELContext context, Object value) throws ELException(Code) | | Evaluates the expression as an lvalue and assigns the given value.
Parameters:
context - used to resolve properties (base.property and base[property])and to perform the assignment to the last base/property pair
throws:
ELException - if evaluation fails (e.g. property not found, type conversion failed, assignment failed...) |
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