org.apache.commons.jelly.expression
Class CompositeExpression
java.lang.Object
|
+--org.apache.commons.jelly.expression.ExpressionSupport
|
+--org.apache.commons.jelly.expression.CompositeExpression
- All Implemented Interfaces:
- Expression
- public class CompositeExpression
- extends ExpressionSupport
CompositeExpression
is a Composite expression made up of several
Expression objects which are concatenated into a single String.
- Version:
- $Revision: 1.4 $
- Author:
- James Strachan
Method Summary |
void |
addExpression(Expression expression)
Adds a new expression to the end of the expression list |
void |
addTextExpression(java.lang.String text)
A helper method to add a new constant text expression |
java.lang.Object |
evaluate(JellyContext context)
Evaluates the expression with the given context
and returns the result |
java.util.Iterator |
evaluateAsIterator(JellyContext context)
Evaluates the expression with the given context
coercing the result to be an Iterator. |
java.lang.String |
evaluateAsString(JellyContext context)
Evaluates the expression with the given context
coercing the result to be a String. |
java.util.List |
getExpressions()
|
static Expression |
parse(java.lang.String text,
ExpressionFactory factory)
Parses the given String to be either a ConstantExpresssion, an Expression denoted as
"${foo}" or some String with embedded expresssions such as "abc${something}def${else}xyz"
which results in a CompositeExpression being returned. |
void |
setExpressions(java.util.List expressions)
Sets the Expression objects that make up this
composite expression |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
CompositeExpression
public CompositeExpression()
CompositeExpression
public CompositeExpression(java.util.List expressions)
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
parse
public static Expression parse(java.lang.String text,
ExpressionFactory factory)
throws java.lang.Exception
- Parses the given String to be either a ConstantExpresssion, an Expression denoted as
"${foo}" or some String with embedded expresssions such as "abc${something}def${else}xyz"
which results in a CompositeExpression being returned.
- Parameters:
text
- is the String to parse into expressionsfactory
- is the Factory of Expression objects used to create expresssions for the contents
of the String "foo" inside expressions such as "${foo}"- Returns:
- the Expresssion for the given String.
- Throws:
JellyException
- if the text is invalid (such as missing '}' character).java.lang.Exception
- if there was some problem creating the underlying Expression object
from the ExpressionFactory
getExpressions
public java.util.List getExpressions()
- Returns:
- the Expression objects that make up this
composite expression
setExpressions
public void setExpressions(java.util.List expressions)
- Sets the Expression objects that make up this
composite expression
addExpression
public void addExpression(Expression expression)
- Adds a new expression to the end of the expression list
addTextExpression
public void addTextExpression(java.lang.String text)
- A helper method to add a new constant text expression
evaluate
public java.lang.Object evaluate(JellyContext context)
- Description copied from interface:
Expression
- Evaluates the expression with the given context
and returns the result
evaluateAsString
public java.lang.String evaluateAsString(JellyContext context)
- Description copied from interface:
Expression
- Evaluates the expression with the given context
coercing the result to be a String.
- Overrides:
evaluateAsString
in class ExpressionSupport
evaluateAsIterator
public java.util.Iterator evaluateAsIterator(JellyContext context)
- Description copied from interface:
Expression
- Evaluates the expression with the given context
coercing the result to be an Iterator.
- Overrides:
evaluateAsIterator
in class ExpressionSupport
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