CAMEL-23528: validate property names when building MATCH/DELETE WHERE clause

[oscerd]

Description

Neo4jProducer.retrieveNodes() and deleteNode() build the Cypher WHERE clause from the CamelNeo4jMatchProperties JSON map. Property values are passed as bound query parameters ($paramN), but property names (the JSON keys) were concatenated into the query string verbatim. A property name containing whitespace or characters that are not valid Cypher identifier characters produced a malformed or unintended query instead of a clear error.

Changes

• Add strict property-name validation (^[A-Za-z_][A-Za-z0-9_]*$) applied in both retrieveNodes() and deleteNode() before the name is used to build the clause.
• Reject non-matching names with a clear IllegalArgumentException, wrapped in Neo4jOperationException consistent with the existing JSON-parse error handling.
• Add a unit test covering valid and rejected property names for both operations.

This makes property-name handling consistent with the already-parameterised value handling and ensures invalid input fails fast with a meaningful message.

Jira: https://issues.apache.org/jira/browse/CAMEL-23528

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Claude Code on behalf of Andrea Cosentino

[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• components/camel-ai/camel-neo4j

All tested modules (10 modules)

• Camel :: AI :: LangChain4j :: Embedding
• Camel :: AI :: LangChain4j :: EmbeddingStore
• Camel :: AI :: Neo4j
• Camel :: JBang :: MCP
• Camel :: JBang :: Plugin :: Route Parser
• Camel :: JBang :: Plugin :: TUI
• Camel :: JBang :: Plugin :: Validate
• Camel :: Launcher :: Container
• Camel :: YAML DSL :: Validator
• Camel :: YAML DSL :: Validator Maven Plugin

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