java.lua

local root_markers = { "gradlew", ".git", "mvnw" }
local lsp = require("lspconfig")
local jdtls = require("jdtls")
local function mk_config()
	local capabilities = lsp.protocol.make_client_capabilities()
	capabilities.workspace.configuration = true
	capabilities.textDocument.completion.completionItem.snippetSupport = true
	return {
		flags = {
			allow_incremental_sync = true,
		},
		handlers = {},
		capabilities = capabilities,
		on_attach = on_attach,
	}
end
local api = vim.api
local function jdtls_on_attach(client, bufnr)
	on_attach(client, bufnr)
	local opts = { silent = true }
	-- jdtls.setup_dap()
	-- jdtls.setup.add_commands()
	api.nvim_buf_set_keymap(bufnr, "n", "<A-o>", "<Cmd>lua require'jdtls'.organize_imports()<CR>", opts)
	api.nvim_buf_set_keymap(bufnr, "n", "<leader>df", "<Cmd>lua require'jdtls'.test_class()<CR>", opts)
	api.nvim_buf_set_keymap(bufnr, "n", "<leader>dn", "<Cmd>lua require'jdtls'.test_nearest_method()<CR>", opts)
	api.nvim_buf_set_keymap(bufnr, "v", "crv", "<Esc><Cmd>lua require('jdtls').extract_variable(true)<CR>", opts)
	api.nvim_buf_set_keymap(bufnr, "n", "crv", "<Cmd>lua require('jdtls').extract_variable()<CR>", opts)
	api.nvim_buf_set_keymap(bufnr, "v", "crm", "<Esc><Cmd>lua require('jdtls').extract_method(true)<CR>", opts)
end
local root_dir = require("jdtls.setup").find_root(root_markers)
local home = os.getenv("HOME")
local workspace_folder = home .. "/.local/share/eclipse/" .. vim.fn.fnamemodify(root_dir, ":p:h:t")
local config = mk_config()
config.flags.server_side_fuzzy_completion = true
config.settings = {
	java = {
		signatureHelp = { enabled = true },
		contentProvider = { preferred = "fernflower" },
		completion = {
			favoriteStaticMembers = {
				"org.hamcrest.MatcherAssert.assertThat",
				"org.hamcrest.Matchers.*",
				"org.hamcrest.CoreMatchers.*",
				"org.junit.jupiter.api.Assertions.*",
				"java.util.Objects.requireNonNull",
				"java.util.Objects.requireNonNullElse",
				"org.mockito.Mockito.*",
			},
		},
		sources = {
			organizeImports = {
				starThreshold = 9999,
				staticStarThreshold = 9999,
			},
		},
		codeGeneration = {
			toString = {
				template = "${object.className}{${member.name()}=${member.value}, ${otherMembers}}",
			},
		},
		configuration = {
			runtimes = {
				{
					name = "JavaSE-11",
					path = "/usr/lib/jvm/java-11-openjdk/",
				},
				{
					name = "JavaSE-15",
					path = "/usr/lib/jvm/java-15-openjdk/",
				},
			},
		},
	},
}
config.cmd = { "java-lsp.sh", workspace_folder }
config.on_attach = jdtls_on_attach

local jar_patterns = {
	"/dev/microsoft/java-debug/com.microsoft.java.debug.plugin/target/com.microsoft.java.debug.plugin-*.jar",
	"/dev/dgileadi/vscode-java-decompiler/server/*.jar",
	"/dev/microsoft/vscode-java-test/server/*.jar",
}
local bundles = {}
for _, jar_pattern in ipairs(jar_patterns) do
	for _, bundle in ipairs(vim.split(vim.fn.glob(home .. jar_pattern), "\n")) do
		if not vim.endswith(bundle, "com.microsoft.java.test.runner.jar") then
			table.insert(bundles, bundle)
		end
	end
end
local extendedClientCapabilities = jdtls.extendedClientCapabilities
extendedClientCapabilities.resolveAdditionalTextEditsSupport = true
config.init_options = {
	bundles = bundles,
	extendedClientCapabilities = extendedClientCapabilities,
}
jdtls.start_or_attach(config)