OGNL - Chapter 4. Expressions
| Chapter 4. Expressions | ||
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Table of Contents
- Constants
- Referring to Properties
- Indexing
- Calling Methods
- Variable References
- Parenthetical Expressions
- Chained Subexpressions
- Collection Construction
- Projecting Across Collections
- Selecting From Collections
- Calling Constructors
- Calling Static Methods
- Getting Static Fields
- Expression Evaluation
- Pseudo-Lambda Expressions
- Pseudo-Properties for Collections
- Operators that differ from Java's operators
- Setting values versus getting values
This section outlines the details the elements of OGNL's expressions.
OGNL has the following kinds of constants:
String literals, as in Java (with the addition of single quotes): delimited by single- or double-quotes, with the full set of character escapes.
Character literals, also as in Java: delimited by single-quotes, also with the full set of escapes.
Numeric literals, with a few more kinds than Java. In addition to Java's ints, longs, floats and doubles, OGNL lets you specify BigDecimals with a "b" or "B" suffix, and BigIntegers with an "h" or "H" suffix (think "huge"---we chose "h" for BigIntegers because it does not interfere with hexadecimal digits).
Boolean (true and false) literals.
The null literal.
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| Chapter 3. Syntax |  | Referring to Properties |