Package io.jmix.dynmodelflowui.impl

Class DynamicViewHandlerExpressionParser

java.lang.Object

io.jmix.dynmodelflowui.impl.DynamicViewHandlerExpressionParser

@Component("dynmod_DynamicViewHandlerExpressionParser")
public class DynamicViewHandlerExpressionParser
extends Object

Works out what the cursor stands in the middle of in a behavior handler expression, so the Admin UI can decide what to offer as code completion. Pure text analysis: it knows nothing about the sandbox API or the edited model.

The text is scanned once from the beginning to the cursor. Only what a completion decision needs is tracked: whether the cursor sits inside a single-quoted literal, and which call the literal is an argument of. This is not a SpEL parser — the text is normally incomplete while being typed, which no real parser would accept.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	DynamicViewHandlerExpressionParser.Call	One open call while scanning: its receiver, its name, and how many arguments were closed by a comma.
static final record	DynamicViewHandlerExpressionParser.Position
static enum	DynamicViewHandlerExpressionParser.PositionKind

Field Summary

Fields

Modifier and Type	Field	Description
protected static final DynamicViewHandlerExpressionParser.Position	NONE
protected static final DynamicViewHandlerExpressionParser.Position	ROOT

Constructor Summary

Constructors

Constructor	Description
DynamicViewHandlerExpressionParser()

Method Summary

Modifier and Type	Method	Description
protected boolean	isIdentifierPart(char c)
protected DynamicViewHandlerExpressionParser.Position	literalPosition(String head, int literalStart, Deque<DynamicViewHandlerExpressionParser.Call> calls)	The literal is only an argument slot when it starts an argument — right after the opening parenthesis or a comma.
protected DynamicViewHandlerExpressionParser.Position	memberPosition(String head)	Classifies a cursor that is not inside a literal: after a dot the receiver decides what applies, otherwise the expression is at its root.
DynamicViewHandlerExpressionParser.Position	parse(String text, int cursorPosition)
protected DynamicViewHandlerExpressionParser.Call	readCall(String head, int parenthesis)	Reads the name of the call whose opening parenthesis is at parenthesis, together with its receiver.
protected String	readPath(String head, int dot)	Reads the dotted path that ends at the dot at dot, walking backwards segment by segment.
protected int	skipWhitespaceBack(String head, int from)
protected boolean	startsArgument(String head, int literalStart)

Methods inherited from class java.lang.Object

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

Field Details

NONE

protected static final DynamicViewHandlerExpressionParser.Position NONE

ROOT

protected static final DynamicViewHandlerExpressionParser.Position ROOT

Constructor Details

DynamicViewHandlerExpressionParser

public DynamicViewHandlerExpressionParser()

Method Details

parse

public DynamicViewHandlerExpressionParser.Position parse(String text,
 int cursorPosition)

Parameters:

text - the editor text, which may be incomplete

cursorPosition - the cursor position within the text

literalPosition

protected DynamicViewHandlerExpressionParser.Position literalPosition(String head,
 int literalStart,
 Deque<DynamicViewHandlerExpressionParser.Call> calls)

The literal is only an argument slot when it starts an argument — right after the opening parenthesis or a comma. A literal built into a larger argument, as in 'a' + 'b', has no known set of valid values.

startsArgument

protected boolean startsArgument(String head,
 int literalStart)

memberPosition

protected DynamicViewHandlerExpressionParser.Position memberPosition(String head)

Classifies a cursor that is not inside a literal: after a dot the receiver decides what applies, otherwise the expression is at its root. A receiver that is not a plain dotted path — a call result, an indexed value — cannot be resolved, so nothing is offered.

readCall

protected DynamicViewHandlerExpressionParser.Call readCall(String head,
 int parenthesis)

Reads the name of the call whose opening parenthesis is at parenthesis, together with its receiver. Both are empty when the parenthesis only groups a sub-expression.

readPath

protected String readPath(String head,
 int dot)

Reads the dotted path that ends at the dot at dot, walking backwards segment by segment.

Returns:

the path, or null when a segment is not a plain name

skipWhitespaceBack

protected int skipWhitespaceBack(String head,
 int from)

isIdentifierPart

protected boolean isIdentifierPart(char c)