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PODetermine Correct Method Signature During Runtime
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copied!<p>I am using the following the following class <code>org.apache.poi.hssf.usermodel.HSSFCell</code>, with a list of the following methods:</p> <pre><code>void setCellValue(boolean value) void setCellValue(java.util.Calendar value) void setCellValue(java.util.Date value) void setCellValue(double value) void setCellValue(HSSFRichTextString value) void setCellValue(java.util.Calendar value) void setCellValue(HSSFRichTextString value) </code></pre> <p>Take note that, there are no methods with Object as method parameter.</p> <p>Now, I have no way to determine my value class type during compiled time. I can only determine my value class type during runtime. Hence, how I can determine the correct method to be called, if I do not know the method signature during compiled time?</p> <p>My code is below:</p> <pre><code>final int rowCount = tableModel.getRowCount(); for (int i = 0; i < rowCount; i++) { final HSSFRow row = sheet.createRow(i + 1); for (int j = 0; j < columnCount; j++) { final Object object = tableModel.getValueAt(i, j); final Class myClass = tableModel.getColumnClass(j); // How to perform casting during compiled time, and invoke // the setCellValue with correct signature? if (object != null) { row.createCell(j).setCellValue(??); // Does not accept Object! } } } </code></pre> <p>Perhaps ugly if...else with <code>instanceof</code> would resolve my problem. However, if I do not want the ugly if...else with <code>instanceof</code>, is there any better way to do so?</p>

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