org.japano.el
Class JavaExpressionGenerator

java.lang.Object
  org.japano.el.JavaExpressionGenerator

All Implemented Interfaces:

org.japano.el.parser.ELParserVisitor

public class JavaExpressionGenerator
extends java.lang.Object
implements org.japano.el.parser.ELParserVisitor

Transforms an EL syntax tree into an optimized java expression.

Version:

$Id: JavaExpressionGenerator.java,v 1.24 2005/10/19 22:26:57 fforw Exp $

Author:

Sven Helmberger ( sven dot helmberger at gmx dot de )

Constructor Summary

JavaExpressionGenerator(org.japano.jasper.compiler.CompilationContext context, boolean jspExpressions)
Creates a new instance of ELCompiler

Method Summary

static void	doMain(java.lang.String[] args) Transforms the first argument into a JavaExpression or asks the user to input one.
static void	main(java.lang.String[] args)
JavaExpression	transform(org.japano.el.parser.Node n, java.lang.Class targetType, org.japano.jasper.compiler.Node baseNode)
JavaExpression	transform(java.lang.String expression, boolean ELIgnored, java.lang.Class targetType, org.japano.jasper.compiler.Node baseNode) Transforms the given EL syntax tree into a JavaExpression.
static java.lang.String	unescape(java.lang.String s)
java.lang.Object	visit(org.japano.el.parser.ELAdditiveExpression node, java.lang.Object data) Visit an ELAdditiveExpression node.
java.lang.Object	visit(org.japano.el.parser.ELAndExpression node, java.lang.Object data) Visit an ELAndExpression node.
java.lang.Object	visit(org.japano.el.parser.ELChainedExpression node, java.lang.Object data) Visit an ELChainedExpression node.
java.lang.Object	visit(org.japano.el.parser.ELConditionalExpression node, java.lang.Object data) Visit an ELConditionalExpression Node.
java.lang.Object	visit(org.japano.el.parser.ELEqualityExpression node, java.lang.Object data) Visit an ELEqualityExpression node.
java.lang.Object	visit(org.japano.el.parser.ELFunctionInvocation node, java.lang.Object data)
java.lang.Object	visit(org.japano.el.parser.ELIdentifier node, java.lang.Object data) Visit an ELIdentifier node.
java.lang.Object	visit(org.japano.el.parser.ELLiteral node, java.lang.Object data) Visit an ELLiteral node
java.lang.Object	visit(org.japano.el.parser.ELMultiplicativeExpression node, java.lang.Object data) Visit an ELMultiplicativeExpression node.
java.lang.Object	visit(org.japano.el.parser.ELNonExpressionText node, java.lang.Object data) Visit an ELNonExpressionText Node.
java.lang.Object	visit(org.japano.el.parser.ELOrExpression node, java.lang.Object data) Visit an ELOrExpression node.
java.lang.Object	visit(org.japano.el.parser.ELRelationExpression node, java.lang.Object data) Visit an ELRelationExpression node.
java.lang.Object	visit(org.japano.el.parser.ELRoot node, java.lang.Object data) Visit an ELRoot Node
java.lang.Object	visit(org.japano.el.parser.ELUnaryExpression node, java.lang.Object data) Visit an ELUnaryExpression node.
java.lang.Object	visit(org.japano.el.parser.SimpleNode node, java.lang.Object data) Visit a SimpleNode.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JavaExpressionGenerator

public JavaExpressionGenerator(org.japano.jasper.compiler.CompilationContext context,
                               boolean jspExpressions)

Creates a new instance of ELCompiler

Parameters:

context - compilation context

jspExpressions - if true, JSP Expressions will be handled in non-EL-Expression Text.

Method Detail

transform

public JavaExpression transform(java.lang.String expression,
                                boolean ELIgnored,
                                java.lang.Class targetType,
                                org.japano.jasper.compiler.Node baseNode)
                         throws org.japano.el.parser.ParseException

Transforms the given EL syntax tree into a JavaExpression.

Parameters:

expression - EL expression to transform into a java expression

ELIgnored - if true, ELExpressions are ignored and only JSP expression are evaluated.

targetType - type the returned java expression should have. null for any type.

Returns:

java expression

Throws:

org.japano.el.parser.ParseException

transform

public JavaExpression transform(org.japano.el.parser.Node n,
                                java.lang.Class targetType,
                                org.japano.jasper.compiler.Node baseNode)

visit

public java.lang.Object visit(org.japano.el.parser.ELRoot node,
                              java.lang.Object data)

Visit an ELRoot Node

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELRoot

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELNonExpressionText node,
                              java.lang.Object data)

Visit an ELNonExpressionText Node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELNonExpressionText

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELConditionalExpression node,
                              java.lang.Object data)

Visit an ELConditionalExpression Node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELConditionalExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELAdditiveExpression node,
                              java.lang.Object data)

Visit an ELAdditiveExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELAdditiveExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELMultiplicativeExpression node,
                              java.lang.Object data)

Visit an ELMultiplicativeExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELMultiplicativeExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELOrExpression node,
                              java.lang.Object data)

Visit an ELOrExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELOrExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELAndExpression node,
                              java.lang.Object data)

Visit an ELAndExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELAndExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELUnaryExpression node,
                              java.lang.Object data)

Visit an ELUnaryExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELUnaryExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELRelationExpression node,
                              java.lang.Object data)

Visit an ELRelationExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELRelationExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELEqualityExpression node,
                              java.lang.Object data)

Visit an ELEqualityExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELEqualityExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELLiteral node,
                              java.lang.Object data)

Visit an ELLiteral node

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELLiteral

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELIdentifier node,
                              java.lang.Object data)

Visit an ELIdentifier node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELIdentifier

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELChainedExpression node,
                              java.lang.Object data)

Visit an ELChainedExpression node.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - ELChainedExpression

data - null

Returns:

JavaExpression

visit

public java.lang.Object visit(org.japano.el.parser.ELFunctionInvocation node,
                              java.lang.Object data)

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

visit

public java.lang.Object visit(org.japano.el.parser.SimpleNode node,
                              java.lang.Object data)

Visit a SimpleNode. This method will never be called and is only there because JJTree created it.

Specified by:

visit in interface org.japano.el.parser.ELParserVisitor

Parameters:

node - SimpleNode

data - null

Returns:

JavaExpression

doMain

public static void doMain(java.lang.String[] args)
                   throws org.japano.el.parser.ParseException

Transforms the first argument into a JavaExpression or asks the user to input one.

Parameters:

args - arguments

Throws:

java.lang.Exception

org.japano.el.parser.ParseException

unescape

public static java.lang.String unescape(java.lang.String s)

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception