MemoryTableModel.java

package elw.dp.app;

import elw.dp.mips.Memory;
import elw.dp.mips.asm.Data;

import javax.swing.table.AbstractTableModel;

public class MemoryTableModel extends AbstractTableModel {
    public static final String COL_ADDR = "Addr";
    private static final String COL_BIN = "Bin8";
    private static final String COL_HEX_WORD = "Hex32";
    private static final String COL_DEC_WORD = "Dec32";
    public static final String COL_ACC = InstructionsTableModel.COL_ACC;

    private final String[] columns = new String[]{COL_ACC, COL_ADDR, COL_HEX_WORD, COL_DEC_WORD, COL_BIN};
    private final Memory memory;

    public MemoryTableModel(Memory memory) {
        this.memory = memory;
    }

    public String getColumnName(int column) {
        return columns[column];
    }

    public int getColumnCount() {
        return columns.length;
    }

    public int getRowCount() {
        return memory.getSize();
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
        final String colName = columns[columnIndex];
        final int address = memory.getAddressAt(rowIndex);

        if (COL_ADDR.equals(colName)) {
            return Data.str(address, 16, 8);
        } else if (COL_BIN.equals(colName)) {
            //Look at this hack on the next line! This should be done inside Data.str()
            return Data.str((long) memory.getByteInternal(address) & 0xFF, 2, 8);
        } else if (COL_HEX_WORD.equals(colName)) {
            if (!memory.hasWord(address)) {
                return "?";
            }
            return Data.str((long) memory.getWordInternal(address) & 0xFFFFFFFFL, 16, 8);
        } else if (COL_DEC_WORD.equals(colName)) {
            if (!memory.hasWord(address)) {
                return "?";
            }
            return Data.str(memory.getWordInternal(address), 10, 0);
        } else if (COL_ACC.equals(colName)) {
            return getAccessMod(address);
        }

        return "";
    }

    private String getAccessMod(int address) {
        StringBuffer accessMod = new StringBuffer();

        if (memory.getReadAdresses().contains(address)) {
            accessMod.append("r");
        }

        if (memory.getWriteAdresses().contains(address)) {
            accessMod.append("w");
        }

        return accessMod.toString();
    }
}