Package org.apache.camel.language.simple

Class SimplePredicateParser

java.lang.Object

org.apache.camel.language.simple.BaseSimpleParser

org.apache.camel.language.simple.SimplePredicateParser

public class SimplePredicateParser
extends BaseSimpleParser

A parser to parse simple language as a Camel Predicate

Field Summary

Fields inherited from class org.apache.camel.language.simple.BaseSimpleParser

allowEscape, camelContext, expression, index, nodes, previousIndex, token, tokens

Constructor Summary

Constructors

Constructor	Description
SimplePredicateParser(org.apache.camel.CamelContext camelContext, String expression, boolean allowEscape, Map<String,org.apache.camel.Expression> cacheExpression)

Method Summary

Modifier and Type	Method	Description
protected boolean	binaryOperator()
protected boolean	booleanValue()
protected String	doParseCode()	Second step parsing into code
protected org.apache.camel.Predicate	doParsePredicate()	Second step parsing into a predicate
protected boolean	doubleQuotedLiteralText()
protected boolean	doubleQuotedLiteralWithFunctionsText()
protected boolean	functionText()
protected boolean	isBooleanValue()
protected boolean	logicalOperator()
protected boolean	minusValue()
protected boolean	nullValue()
protected boolean	numericValue()
String	parseCode()
org.apache.camel.Predicate	parsePredicate()
List<SimpleNode>	parseTokens()	First step parsing into a list of nodes.
protected void	parseTokensAndCreateNodes()	Parses the tokens and crates the AST nodes.
protected boolean	singleQuotedLiteralText()
protected boolean	singleQuotedLiteralWithFunctionsText()
protected boolean	unaryOperator()

Methods inherited from class org.apache.camel.language.simple.BaseSimpleParser

accept, clear, expect, expectAndAcceptMore, nextToken, nextToken, prepareBlocks, prepareUnaryExpressions

Methods inherited from class java.lang.Object

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

Constructor Details

SimplePredicateParser

public SimplePredicateParser(org.apache.camel.CamelContext camelContext,
 String expression,
 boolean allowEscape,
 Map<String,org.apache.camel.Expression> cacheExpression)

Method Details

parsePredicate

public org.apache.camel.Predicate parsePredicate()

parseCode

public String parseCode()

parseTokens

public List<SimpleNode> parseTokens()

First step parsing into a list of nodes. This is used as SPI for camel-csimple to do AST transformation and parse into java source code.

doParsePredicate

protected org.apache.camel.Predicate doParsePredicate()

Second step parsing into a predicate

doParseCode

protected String doParseCode()

Second step parsing into code

parseTokensAndCreateNodes

protected void parseTokensAndCreateNodes()

Parses the tokens and crates the AST nodes.

After the initial parsing of the input (input -> tokens) then we parse again (tokens -> ast).

In this parsing the balance of the blocks is checked, so that each block has a matching start and end token. For example a single quote block, or a function block etc.

isBooleanValue

protected boolean isBooleanValue()

singleQuotedLiteralWithFunctionsText

protected boolean singleQuotedLiteralWithFunctionsText()

singleQuotedLiteralText

protected boolean singleQuotedLiteralText()

doubleQuotedLiteralWithFunctionsText

protected boolean doubleQuotedLiteralWithFunctionsText()

doubleQuotedLiteralText

protected boolean doubleQuotedLiteralText()

functionText

protected boolean functionText()

unaryOperator

protected boolean unaryOperator()

binaryOperator

protected boolean binaryOperator()

logicalOperator

protected boolean logicalOperator()

numericValue

protected boolean numericValue()

booleanValue

protected boolean booleanValue()

nullValue

protected boolean nullValue()

minusValue

protected boolean minusValue()