lspce-jdtls-completion-max-results does not change the max results returned by completion-at-point

[Matthew-Craig01]

jdtls in java-ts-mode is returning a maximum of 50 completion results, despite setting lspce-jdtls-completion-max-results to 5.

I have the following in my config:

(setq lspce-jdtls-completion-max-results 5)
;; Copied from README
(setq lspce-server-programs `(("rust"  "rust-analyzer" "" lspce-ra-initializationOptions)
                           ("python" "pylsp" "" )
                           ("C" "clangd" "--all-scopes-completion --clang-tidy --enable-config --header-insertion-decorators=0")
                           ("java" "java" lspce-jdtls-cmd-args lspce-jdtls-initializationOptions)))

The lspce-jdtls-completion-max-results initialization option is being processed because the log shows the following (notice maxResults: 5):

2025-02-27 22:08:43.901 - initialize request {
  "id": "1000000301",
  "method": "initialize",
  "params": {
    "capabilities": {
      "experimental": {},
      "textDocument": {
        "callHierarchy": {
          "dynamicRegistration": false
        },
        "codeAction": {
          "codeActionLiteralSupport": {
            "codeActionKind": {
              "valueSet": [
                "quickfix",
                "refactor",
                "refactor.extract",
                "refactor.inline",
                "refactor.rewrite",
                "source",
                "source.organizeImports"
              ]
            }
          },
          "dataSupport": false,
          "disabledSupport": false,
          "dynamicRegistration": false,
          "isPreferredSupport": true
        },
        "completion": {
          "completionItem": {
            "commitCharactersSupport": false,
            "deprecatedSupport": true,
            "documentationFormat": [
              "markdown",
              "plaintext"
            ],
            "insertReplaceSupport": false,
            "preselectSupoort": false,
            "resolveSupport": {
              "properties": [
                "documentation",
                "details",
                "additionalTextEdits"
              ]
            },
            "snippetSupport": true,
            "tagSupport": {
              "valueSet": [
                1
              ]
            }
          },
          "contextSupport": true,
          "dynamicRegistration": false
        },
        "declaration": {
          "dynamicRegistration": false,
          "linkSupport": false
        },
        "definition": {
          "dynamicRegistration": false,
          "linkSupport": false
        },
        "documentHighlight": {
          "dynamicRegistration": false
        },
        "documentSymbol": {
          "dynamicRegistration": false,
          "hierarchicalDocumentSymbolSupport": true,
          "symbolKind": {
            "valueSet": [
              1,
              2,
              3,
              4,
              5,
              6,
              7,
              8,
              9,
              10,
              11,
              12,
              13,
              14,
              15,
              16,
              17,
              18,
              19,
              20,
              21,
              22,
              23,
              24,
              25,
              26
            ]
          }
        },
        "formatting": {
          "dynamicRegistration": false
        },
        "hover": {
          "contentFormat": [
            "markdown",
            "plaintext"
          ],
          "dynamicRegistration": false
        },
        "implementation": {
          "dynamicRegistration": false,
          "linkSupport": false
        },
        "inlayHint": {
          "dynamicRegistration": false
        },
        "publishDiagnostics": {
          "codeDescriptionSupport": false,
          "dataSupport": false,
          "relatedInformation": false,
          "tagSupport": {
            "valueSet": [
              1,
              2
            ]
          },
          "versionSupport": false
        },
        "rangeFormatting": {
          "dynamicRegistration": false
        },
        "references": {
          "dynamicRegistration": false
        },
        "rename": {
          "dynamicRegistration": false,
          "honorsChangeAnnotations": false,
          "prepareSupport": false
        },
        "signatureHelp": {
          "contextSupport": false,
          "dynamicRegistration": false,
          "signatureInformation": {
            "activeParameterSupport": false,
            "documentationFormat": [
              "markdown",
              "plaintext"
            ],
            "parameterInformation": {
              "labelOffsetSupport": false
            }
          }
        },
        "synchronization": {
          "didSave": true,
          "dynamicRegistration": false,
          "willSave": true
        },
        "typeDefinition": {
          "dynamicRegistration": false,
          "linkSupport": false
        }
      },
      "workspace": {
        "applyEdit": false,
        "configuration": false,
        "executeCommand": {
          "dynamicRegistration": false
        },
        "symbol": {
          "dynamicRegistration": false
        },
        "workspaceEdit": {
          "documentChanges": true,
          "resourceOperations": [
            "create",
            "rename",
            "delete"
          ]
        },
        "workspaceFolders": false
      }
    },
    "clientInfo": {
      "name": "lspce",
      "version": "1.1.0"
    },
    "initializationOptions": {
      "extendedClientCapabilities": {
        "classFileContentsSupport": true
      },
      "settings": {
        "java": {
          "autobuild": {
            "enabled": true
          },
          "completion": {
            "enabled": true,
            "guessMethodArguments": true,
            "importOrder": [
              "java",
              "javax",
              "com",
              "org"
            ],
            "maxResults": 5
          },
          "configuration": {
            "checkProjectSettingsExclusions": true,
            "updateBuildConfiguration": "automatic"
          },
          "foldingRange": {
            "enabled": false
          },
          "import": {
            "gradle": {
              "enabled": true,
              "offline": {
                "enabled": true
              },
              "wrapper": {
                "enabled": true
              }
            },
            "maven": {
              "enabled": true
            }
          },
          "maven": {
            "downloadSources": true,
            "updateSnapshots": true
          },
          "maxConcurrentBuilds": 1,
          "progressReports": {
            "enabled": true
          },
          "project": {
            "importHint": true,
            "importOnFirstTimeStartup": "automatic",
            "referecedLibraries": [
              "lib/**/*.jar"
            ]
          },
          "server": {
            "launchMode": "Hybrid"
          },
          "showBuildStatusOnStart": {
            "enabled": true
          },
          "signatureHelp": {
            "enabled": true
          },
          "trace": {
            "server": "off"
          }
        }
      }
    },
    "processId": 622510,
    "rootPath": "file:///home/matthew/Code/Java/Leetcode",
    "rootUri": "file:///home/matthew/Code/Java/Leetcode"
  },
  "request_tick": "1674_1006_/home/matthew/Code/Java/Leetcode/src/main/java/MinOfRotatedArray/Solution.java"
}

However, running completion-at-point returns a maximum of 50 results, rather than 5.
I want to edit this value so that I can have a very high value specifically for manual vertico-based completion-at-point.

I suspect that none of the settings are being applied because changing (lspce--add-option "settings.java.completion.enabled" t options) in lspce-jdtls-initializationOptions to (lspce--add-option "settings.java.completion.enabled" nil options) does not disable completion.

A possible guess is that settings aren't meant to come inside of initialization options. I do not know much about jdtls but it seems to be done this way in Sublime's configuration.

[zbelial]

Thanks for reporting this, @Matthew-Craig01 . I can confirm this.
I just open an issue in jdt.ls, let's wait to see what the root cause is.

[Matthew-Craig01]

Thanks for reporting this, @Matthew-Craig01 . I can confirm this. I just open an issue in jdt.ls, let's wait to see what the root cause is.

Since posting this issue, I've experimented with other LSP clients and found the same problem. I think you're correct that it's broken in the latest jdtls release. Apologies for incorrectly assuming it was LSPCE's fault. Thanks for submitting an issue with jdtls!

[zbelial]

No need to apology :)
I use jdtls too but hadn't noticed this problem. I'll benefit from your report, even if it's not an issue of lspce.