# Business Logic — Closure.execute() [10 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.KKW01021SF.Closure` |
| Layer | Service (webview screen processing logic, invoked as a callback) |
| Module | `KKW01021SF` (Package: `eo.web.webview.KKW01021SF`) |

## 1. Role

### Closure.execute()

The `Closure.execute()` method is a callback that implements the item-evaluation pattern within the KKW01021SF screen processing module. It is invoked by `Items.each()` to inspect each data item in a collection and conditionally mark it as selectable.

The method compares the submission date (`mskmYmd` / "申込む年月日") stored on the enclosing `KKW01021SFLogic` instance against the same field extracted from the current `BeanMap` item. If the two values match — meaning the item was submitted on the expected date — the method sets a `Boolean.TRUE` flag (mapped under the key "選択" / "choice") back into the item's map. This flag signals to downstream UI rendering or validation logic that the item should be presented as an active or selectable entry.

This method follows the **Callback / Closure** design pattern: it is defined as an inner class implementing a functional interface (likely `Consumer<BeanMap>` or similar) and is passed to `Items.each()` for iteration-based processing. Its role in the larger system is that of a **precondition filter** — it does not modify business data, but it annotates items with metadata (the "choice" flag) that controls their visibility or interactivity on the screen.

The method implements a single conditional branch:
- **Match branch** (dates match): Sets `choice = Boolean.TRUE` into the item, marking it as selectable.
- **No-match branch** (dates differ): The item is left unmodified — the absence of the `CHOICE_03` flag effectively marks it as non-selectable.

This is a lightweight, side-effect-only utility with no external service calls, database access, or CRUD operations.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["execute(item)"])
    READ["Read mskmYmd from item via KKW01021SFConst.MSKM_YMD_03 = \"申込む年月日\""]
    COND["this.mskmYmd equals mskmYmd?"]
    ASSIGN["Set choice = Boolean.TRUE"]
    PUT["Put choice into item via KKW01021SFConst.CHOICE_03 = \"選択\""]
    END_NODE(["End — return"])

    START --> READ
    READ --> COND
    COND -->|true| ASSIGN
    COND -->|false| END_NODE
    ASSIGN --> PUT
    PUT --> END_NODE
```

**Processing steps:**

1. **Extract submission date** — Read the value associated with key `KKW01021SFConst.MSKM_YMD_03` ("申込む年月日" / "submitted year/month/day") from the `item` `BeanMap`.
2. **Compare dates** — Check whether the extracted date equals `this.mskmYmd`, the date value stored on the enclosing `KKW01021SFLogic` instance (set via the `setMskmYmd()` setter).
3. **If dates match (true branch):**
   - Create a `Boolean.TRUE` flag stored in local variable `choice`.
   - Write this flag into the item's map under key `KKW01021SFConst.CHOICE_03` ("選択" / "choice").
4. **If dates differ (false branch):** Skip the assignment — the item remains unmodified, effectively marking it as not selectable.
5. **Return** — no return value (void).

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| 1 | `item` | `BeanMap` | A single data record (item) from the screen's item collection. The map carries field key-value pairs representing the data presented on or returned from the KKW01021SF screen. |

**Instance fields read:**

| Field | Type | Business Description |
|-------|------|---------------------|
| `this.mskmYmd` | `String` | The expected submission date ("申込む年月日") stored on the enclosing logic instance, typically set during screen initialization or prior processing. Used as the reference date against which each item is compared. |

## 4. CRUD Operations / Called Services

This method does **not** perform any CRUD operations. It does not invoke any service components (SC), CBS (batch processing service), or DAO layers. It operates entirely on in-memory data structures (`BeanMap`) with a single conditional assignment.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| *(none)* | — | — | — | This method is a pure in-memory predicate/annotator with no persistence side effects. |

## 5. Dependency Trace

### Pre-computed evidence from code analysis graph:

No screen/batch entry points found within 8 hops. Direct callers found: 1 method.

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Caller: `Items.each()` | `Items.each(closure)` -> `Closure.execute(item)` | *(none — this method performs no CRUD)* |

**Notes on caller:**
- `Items.each()` is an iteration utility that applies a closure/callback to each element in a collection. This `Closure` instance is passed to it, and `execute(BeanMap)` is invoked once per item. The caller itself (`Items.each()`) does not appear to be a screen entry point — it is a utility method invoked by higher-level logic within the KKW01021SF screen processing flow.

## 6. Per-Branch Detail Blocks

**Block 1** — [EXTRACT] (L1685)

> Extract the submission date field from the item map using the constant key.

| # | Type | Code |
|---|------|------|
| 1 | SET | `String mskmYmd = (String)item.get(KKW01021SFConst.MSKM_YMD_03);` // Extract submission date from item [-> KKW01021SFConst.MSKM_YMD_03="申込む年月日"] |

**Block 2** — [IF] `(this.mskmYmd.equals(mskmYmd))` (L1686)

> Compare the stored expected date with the item's submission date. If they match, mark the item as selectable.

| # | Type | Code |
|---|------|------|
| 1 | COND | `if (this.mskmYmd.equals(mskmYmd))` // Compare instance stored date with item's submitted date |

**Block 2.1** — [IF-BRANCH: true] (L1688–1691)

> The item's submission date matches the expected date. Set the selectable flag.

| # | Type | Code |
|---|------|------|
| 1 | SET | `Boolean choice = Boolean.TRUE;` // Create selectable flag |
| 2 | SET | `item.put(KKW01021SFConst.CHOICE_03, choice);` // Mark item as selectable [-> KKW01021SFConst.CHOICE_03="選択"] |

**Block 2.2** — [IF-BRANCH: false] (implicit)

> The item's submission date does not match the expected date. No action is taken — the item remains unmodified and will not carry a `CHOICE_03` flag, effectively excluding it from selection.

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `mskmYmd` | Field | Submitted year/month/day — the date on which a service order or request was submitted. Japanese: "申込む年月日". |
| `CHOICE_03` | Field / Key | Choice flag — a Boolean indicator stored in a BeanMap that signals whether an item is selectable on the screen. Japanese key: "選択". |
| `MSKM_YMD_03` | Constant | Map key for the submission date field. Japanese value: "申込む年月日". |
| BeanMap | Technical | A map-like data structure (typically from Apache Commons BeanUtils) used to carry screen data fields as key-value pairs. |
| Closure | Pattern | An inner class implementing a functional interface (consumer pattern) that is passed as a callback to be applied to each element in a collection via `Items.each()`. |
| KKW01021SF | Module | A webview screen module responsible for displaying and processing a submission-related screen (likely related to service order submission or modification). |
| `each()` | Utility | A collection iteration method that applies a given closure to each item in an item list, enabling bulk annotation or filtering of screen data. |