InstructionsTableModel.java

package elw.dp.app;

import elw.dp.mips.Instruction;
import elw.dp.mips.Instructions;
import elw.dp.mips.asm.Data;

import javax.swing.table.AbstractTableModel;

public class InstructionsTableModel extends AbstractTableModel {
    public static final String COL_ADDR = "Addr";
    private static final String COL_BIN = "Bin";
    private static final String COL_LABELS = "Labels";
    public static final String COL_CODE = "Code";
    public static final String COL_ACC = "rw";

    private final String[] columns = new String[]{COL_ACC, COL_ADDR, COL_BIN, COL_CODE, COL_LABELS};
    private final Instructions instructions;

    public InstructionsTableModel(Instructions instructions) {
        this.instructions = instructions;
    }

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

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

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

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

        if (COL_ADDR.equals(colName)) {
            return Data.int2hex(address, 2);
        } else if (COL_BIN.equals(colName)) {
            final Instruction internal = instructions.getInternal(address);
            if (internal != null) {
                final String code = internal.getBinaryCode();
                return groupBy(code, 4);
            }
        } else if (COL_CODE.equals(colName)) {
            final Instruction internal = instructions.getInternal(address);
            if (internal != null) {
                return internal.getCodeLine();
            }
        } else if (COL_ACC.equals(colName)) {
            return getAccessMod(address);
        } else if (COL_LABELS.equals(colName)) {
            final Instruction internal = instructions.getInternal(address);
            if (internal != null) {
                StringBuilder labelsStr = new StringBuilder();
                for (String label : internal.getLabels()) {
                    if (labelsStr.length() > 0) {
                        labelsStr.append(", ");
                    }
                    labelsStr.append(label);
                }
                return labelsStr.toString();
            }
        }

        return "";
    }

    private String groupBy(final String code, final int group) {
        if (code.length() > group) {
            return code.substring(0, group) + " " + groupBy(code.substring(group), group);
        }

        return code;
    }

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

        if (instructions.getReadAddresses().contains(rowIndex)) {
            accessMod.append("r");
        }

        return accessMod.toString();
    }
}