7510131a7d
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat
63 lines
2.9 KiB
Markdown
63 lines
2.9 KiB
Markdown
# 1. Goal
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Check the temperature log of a refrigerated shipment. A logistics program calls the
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check before it releases the shipment. The check must give one reason code for each
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log that is not correct.
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# 2. Open questions
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None.
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# 3. Context
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- The exception class {{P}}CX_COLD_CHAIN exists in package $TMP. It is active.
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- The class inherits from CX_STATIC_CHECK. It has the read-only attribute MV_RULE
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(type STRING), the constructor with the importing parameter IV_RULE (type STRING),
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and the redefined method GET_TEXT.
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- GET_TEXT returns the text Cold chain check failed: <rule code>.
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- A temperature log is a table of readings. One reading has the time offset in
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minutes (OFFSET_MIN) and the temperature in tenths of a degree Celsius
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(TEMP_TENTHS). Example: the value -185 means -18.5 degrees Celsius.
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# 4. Contract
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- Create the class {{P}}COLD_CHAIN_CHECK in package $TMP.
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- The class is public, final, and has a public constructor.
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- The class has these public types:
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- TY_READING: a structure with the fields OFFSET_MIN (type I) and TEMP_TENTHS
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(type I).
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- TT_READINGS: a standard table of TY_READING with an empty key.
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- TY_CONFIG: a structure with the fields MIN_TENTHS (type I), MAX_TENTHS
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(type I), MIN_DURATION (type I), and MAX_GAP (type I).
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- The constructor has the importing parameter IS_CONFIG of type TY_CONFIG.
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- The class has the method CHECK with the importing parameter IT_READINGS of type
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TT_READINGS, the returning parameter RV_MEAN of type I, and the addition
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RAISING {{P}}CX_COLD_CHAIN.
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- Do not add other public methods.
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- Do not change {{P}}CX_COLD_CHAIN.
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# 5. Business rules
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Apply the rules in this sequence. Raise the exception {{P}}CX_COLD_CHAIN with the
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rule code of the first rule that fails. Pass the rule code in the parameter IV_RULE.
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The rule codes are the character strings TOO_FEW, NO_START, TIME_ORDER, TOO_SHORT,
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GAP, TOO_HIGH, and TOO_LOW.
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The caller always passes a configuration with MIN_TENTHS less than or equal to
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MAX_TENTHS.
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1. If IT_READINGS has less than 2 entries, use TOO_FEW.
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2. If the offset of the first entry is not 0, use NO_START.
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3. If the offsets are not strictly increasing, use TIME_ORDER.
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4. If the offset of the last entry is less than MIN_DURATION, use TOO_SHORT.
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5. If the difference between the offsets of two consecutive entries is greater than
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MAX_GAP, use GAP.
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6. Read the entries in the table order. If TEMP_TENTHS is greater than MAX_TENTHS,
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use TOO_HIGH. If TEMP_TENTHS is less than MIN_TENTHS, use TOO_LOW.
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7. Else return the sum of all TEMP_TENTHS divided by the number of entries. Truncate
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the result toward zero.
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# 6. Constraints
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- Release target: 8.16.
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- Coding standards: Clean ABAP. Method length below 40 statements. No global
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variables. No comment that restates the code.
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- Out of scope: do not change {{P}}CX_COLD_CHAIN.
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# 7. Acceptance
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- The class is active and has no syntax error.
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- The hidden tests pass.
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- Write your own ABAP Unit tests for the class.
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