[ISSUE #10862] Accept zero floating-point filter literals

[yuluo-yx]

Which Issue(s) This PR Fixes

• Fixes [Bug] Filter parser rejects zero floating-point literals #10862

Brief Description

ConstantExpression.createFloat used Double.MIN_VALUE, the smallest positive value, as a lower bound and therefore rejected 0.0. This change uses -Double.MAX_VALUE as the finite lower bound.

A selector regression test verifies that a = 0.0 parses and evaluates successfully.

How Did You Test This Change?

• mise exec java@temurin-17.0.19+10 -- mvn -pl filter -am -DskipITs -Dtest=ExpressionTest -Dsurefire.failIfNoSpecifiedTests=false test
• Result: BUILD SUCCESS; 62 tests, 0 failures, 0 errors, 0 skipped.
• Scope check: 2 files, 15 changed lines.

[RockteMQ-AI]

Summary

Fixes a bug where ConstantExpression.createFloat rejected 0.0 (and all negative values) because Double.MIN_VALUE is the smallest positive double (4.9E-324), not the most negative. The lower bound is corrected to -Double.MAX_VALUE.

Analysis

• Correctness ✅ — Double.MIN_VALUE as a lower bound was clearly wrong. The fix to -Double.MAX_VALUE correctly allows the full range of finite doubles including zero and negatives.
• Tests ✅ — Regression test covers a = 0.0 which was the failing case.
• Compatibility ✅ — Widens accepted range; no breaking change for existing valid inputs.

LGTM.

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Automated review by github-manager-bot

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.30%. Comparing base (fd0c959) to head (d504bf9).

Files with missing lines	Patch %	Lines
...rocketmq/filter/expression/ConstantExpression.java	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10867      +/-   ##
=============================================
- Coverage      48.39%   48.30%   -0.10%     
+ Complexity     13562    13527      -35     
=============================================
  Files           1380     1380              
  Lines         101165   101165              
  Branches       13127    13127              
=============================================
- Hits           48962    48864      -98     
- Misses         46233    46306      +73     
- Partials        5970     5995      +25     

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