org.hkijena.jipipe.extensions.expressions

Class DefaultExpressionEvaluator

java.lang.Object

com.fathzer.soft.javaluator.AbstractEvaluator<Object>

org.hkijena.jipipe.extensions.expressions.ExpressionEvaluator

org.hkijena.jipipe.extensions.expressions.DefaultExpressionEvaluator

public class DefaultExpressionEvaluator
extends ExpressionEvaluator

Describes basic properties of a AbstractExpressionParameter

Field Summary

Fields

Modifier and Type	Field and Description
static ExpressionConstant	CONSTANT_E
static ExpressionConstant	CONSTANT_FALSE
static ExpressionConstant	CONSTANT_NULL
static ExpressionConstant	CONSTANT_PI
static ExpressionConstant	CONSTANT_TAU
static ExpressionConstant	CONSTANT_TRUE
static ExpressionOperator	OPERATOR_AND_SYMBOL
static ExpressionOperator	OPERATOR_AND_TEXT
static ExpressionOperator	OPERATOR_ELEMENT_ACCESS_SYMBOL
static ExpressionOperator	OPERATOR_ELEMENT_ACCESS_TEXT
static ExpressionOperator	OPERATOR_NEGATE_SYMBOL
static ExpressionOperator	OPERATOR_NEGATE_TEXT
static ExpressionOperator	OPERATOR_NUMERIC_DIVIDE
static ExpressionOperator	OPERATOR_NUMERIC_EQUALS
static ExpressionOperator	OPERATOR_NUMERIC_EQUALS_TEXT
static ExpressionOperator	OPERATOR_NUMERIC_EXPONENT
static ExpressionOperator	OPERATOR_NUMERIC_GREATER_THAN
static ExpressionOperator	OPERATOR_NUMERIC_GREATER_THAN_OR_EQUAL
static ExpressionOperator	OPERATOR_NUMERIC_LESS_THAN
static ExpressionOperator	OPERATOR_NUMERIC_LESS_THAN_OR_EQUAL
static ExpressionOperator	OPERATOR_NUMERIC_MINUS
static ExpressionOperator	OPERATOR_NUMERIC_MODULO
static ExpressionOperator	OPERATOR_NUMERIC_MULTIPLY
static com.fathzer.soft.javaluator.Operator	OPERATOR_NUMERIC_NEGATE
static com.fathzer.soft.javaluator.Operator	OPERATOR_NUMERIC_NEGATE_HIGH
static ExpressionOperator	OPERATOR_NUMERIC_STRING_PLUS
static ExpressionOperator	OPERATOR_NUMERIC_UNEQUALS
static ExpressionOperator	OPERATOR_NUMERIC_UNEQUALS_TEXT
static ExpressionOperator	OPERATOR_OR_SYMBOL
static ExpressionOperator	OPERATOR_OR_TEXT
static ExpressionOperator	OPERATOR_PAIR
static ExpressionOperator	OPERATOR_STATEMENT
static ExpressionOperator	OPERATOR_STRING_CONTAINS
static ExpressionOperator	OPERATOR_STRING_CONTAINS2
static ExpressionOperator	OPERATOR_VARIABLE_EXISTS
static ExpressionOperator	OPERATOR_VARIABLE_RESOLVE
static ExpressionOperator	OPERATOR_XOR_TEXT

Constructor Summary

Constructors

Constructor and Description
DefaultExpressionEvaluator()

Method Summary

Modifier and Type	Method and Description
Exception	checkSyntax(String expression) Checks the syntax of an expression.
static com.fathzer.soft.javaluator.Parameters	createParameters()
static Object	deepCopyObject(Object object) Deep-copies an object.
static String	escapeString(String string) Escapes a string, so it can be used within quotes
static String	escapeVariable(String variableName) Escapes a variable name into a valid expression
protected Object	evaluate(com.fathzer.soft.javaluator.Constant constant, Object evaluationContext)
protected Object	evaluate(com.fathzer.soft.javaluator.Function function, Iterator<Object> arguments, Object evaluationContext)
protected Object	evaluate(com.fathzer.soft.javaluator.Operator operator, Iterator<Object> operands, Object evaluationContext)
Object	evaluate(String expression, Object evaluationContext)
List<String>	getKnownNonAlphanumericOperatorTokens()
protected Iterator<String>	tokenize(String expression)
List<String>	tokenize(String expression, boolean includeQuotesAsToken, boolean includeQuotesIntoToken)
protected Object	toValue(String literal, Object evaluationContext)
static String	unescapeString(String escapedString)

Methods inherited from class org.hkijena.jipipe.extensions.expressions.ExpressionEvaluator

test

Methods inherited from class com.fathzer.soft.javaluator.AbstractEvaluator

evaluate, getConstants, getFunctions, getOperators, guessOperator, validateHomonyms

Methods inherited from class java.lang.Object

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

Field Detail

CONSTANT_NULL

public static final ExpressionConstant CONSTANT_NULL

CONSTANT_TRUE

public static final ExpressionConstant CONSTANT_TRUE

CONSTANT_FALSE

public static final ExpressionConstant CONSTANT_FALSE

CONSTANT_PI

public static final ExpressionConstant CONSTANT_PI

CONSTANT_TAU

public static final ExpressionConstant CONSTANT_TAU

CONSTANT_E

public static final ExpressionConstant CONSTANT_E

OPERATOR_NEGATE_SYMBOL

public static final ExpressionOperator OPERATOR_NEGATE_SYMBOL

OPERATOR_NEGATE_TEXT

public static final ExpressionOperator OPERATOR_NEGATE_TEXT

OPERATOR_AND_SYMBOL

public static final ExpressionOperator OPERATOR_AND_SYMBOL

OPERATOR_AND_TEXT

public static final ExpressionOperator OPERATOR_AND_TEXT

OPERATOR_OR_SYMBOL

public static final ExpressionOperator OPERATOR_OR_SYMBOL

OPERATOR_OR_TEXT

public static final ExpressionOperator OPERATOR_OR_TEXT

OPERATOR_XOR_TEXT

public static final ExpressionOperator OPERATOR_XOR_TEXT

OPERATOR_NUMERIC_EQUALS

public static final ExpressionOperator OPERATOR_NUMERIC_EQUALS

OPERATOR_NUMERIC_EQUALS_TEXT

public static final ExpressionOperator OPERATOR_NUMERIC_EQUALS_TEXT

OPERATOR_NUMERIC_UNEQUALS

public static final ExpressionOperator OPERATOR_NUMERIC_UNEQUALS

OPERATOR_NUMERIC_UNEQUALS_TEXT

public static final ExpressionOperator OPERATOR_NUMERIC_UNEQUALS_TEXT

OPERATOR_NUMERIC_LESS_THAN

public static final ExpressionOperator OPERATOR_NUMERIC_LESS_THAN

OPERATOR_NUMERIC_GREATER_THAN

public static final ExpressionOperator OPERATOR_NUMERIC_GREATER_THAN

OPERATOR_NUMERIC_LESS_THAN_OR_EQUAL

public static final ExpressionOperator OPERATOR_NUMERIC_LESS_THAN_OR_EQUAL

OPERATOR_NUMERIC_GREATER_THAN_OR_EQUAL

public static final ExpressionOperator OPERATOR_NUMERIC_GREATER_THAN_OR_EQUAL

OPERATOR_NUMERIC_STRING_PLUS

public static final ExpressionOperator OPERATOR_NUMERIC_STRING_PLUS

OPERATOR_NUMERIC_MINUS

public static final ExpressionOperator OPERATOR_NUMERIC_MINUS

OPERATOR_NUMERIC_MULTIPLY

public static final ExpressionOperator OPERATOR_NUMERIC_MULTIPLY

OPERATOR_NUMERIC_DIVIDE

public static final ExpressionOperator OPERATOR_NUMERIC_DIVIDE

OPERATOR_NUMERIC_MODULO

public static final ExpressionOperator OPERATOR_NUMERIC_MODULO

OPERATOR_NUMERIC_EXPONENT

public static final ExpressionOperator OPERATOR_NUMERIC_EXPONENT

OPERATOR_NUMERIC_NEGATE

public static final com.fathzer.soft.javaluator.Operator OPERATOR_NUMERIC_NEGATE

OPERATOR_NUMERIC_NEGATE_HIGH

public static final com.fathzer.soft.javaluator.Operator OPERATOR_NUMERIC_NEGATE_HIGH

OPERATOR_STRING_CONTAINS

public static final ExpressionOperator OPERATOR_STRING_CONTAINS

OPERATOR_STRING_CONTAINS2

public static final ExpressionOperator OPERATOR_STRING_CONTAINS2

OPERATOR_VARIABLE_EXISTS

public static final ExpressionOperator OPERATOR_VARIABLE_EXISTS

OPERATOR_VARIABLE_RESOLVE

public static final ExpressionOperator OPERATOR_VARIABLE_RESOLVE

OPERATOR_ELEMENT_ACCESS_TEXT

public static final ExpressionOperator OPERATOR_ELEMENT_ACCESS_TEXT

OPERATOR_ELEMENT_ACCESS_SYMBOL

public static final ExpressionOperator OPERATOR_ELEMENT_ACCESS_SYMBOL

OPERATOR_STATEMENT

public static final ExpressionOperator OPERATOR_STATEMENT

OPERATOR_PAIR

public static final ExpressionOperator OPERATOR_PAIR

Constructor Detail

DefaultExpressionEvaluator

public DefaultExpressionEvaluator()

Method Detail

createParameters

public static com.fathzer.soft.javaluator.Parameters createParameters()

escapeVariable

public static String escapeVariable(String variableName)

Escapes a variable name into a valid expression

Parameters:

variableName - the variable name

Returns:

an expression that evaluates the variable

escapeString

public static String escapeString(String string)

Escapes a string, so it can be used within quotes

Parameters:

string - the string

Returns:

string with quotes and backslashes escaped

deepCopyObject

public static Object deepCopyObject(Object object)

Deep-copies an object. Supports handling Collection and Map

Parameters:

object - the object

Returns:

the copy

unescapeString

public static String unescapeString(String escapedString)

tokenize

public List<String> tokenize(String expression,
                             boolean includeQuotesAsToken,
                             boolean includeQuotesIntoToken)

tokenize

protected Iterator<String> tokenize(String expression)

Overrides:

tokenize in class com.fathzer.soft.javaluator.AbstractEvaluator<Object>

evaluate

public Object evaluate(String expression,
                       Object evaluationContext)

Overrides:

evaluate in class com.fathzer.soft.javaluator.AbstractEvaluator<Object>

evaluate

protected Object evaluate(com.fathzer.soft.javaluator.Function function,
                          Iterator<Object> arguments,
                          Object evaluationContext)

Overrides:

evaluate in class com.fathzer.soft.javaluator.AbstractEvaluator<Object>

evaluate

protected Object evaluate(com.fathzer.soft.javaluator.Constant constant,
                          Object evaluationContext)

Overrides:

evaluate in class com.fathzer.soft.javaluator.AbstractEvaluator<Object>

evaluate

protected Object evaluate(com.fathzer.soft.javaluator.Operator operator,
                          Iterator<Object> operands,
                          Object evaluationContext)

Overrides:

evaluate in class com.fathzer.soft.javaluator.AbstractEvaluator<Object>

checkSyntax

public Exception checkSyntax(String expression)

Checks the syntax of an expression.

Returns:

the exception that was thrown if some error was returned. Null if syntax is correct.

toValue

protected Object toValue(String literal,
                         Object evaluationContext)

Specified by:

toValue in class com.fathzer.soft.javaluator.AbstractEvaluator<Object>

getKnownNonAlphanumericOperatorTokens

public List<String> getKnownNonAlphanumericOperatorTokens()