CODEWITHSUNDEEP
java
Rob Mason
Rob Mason

Reputation: 1417

Alternative to Java Enum

I have an Enum that handles columns in a table. It is in production.

public enum Column {

    NAME("m_Name", "Name", "TEXT"), ADDRESS("m_Address", "Address", "TEXT");

    private String value;
    private String label;
    private String sortType;

    private Column(String value, String label, String sortType) {
        this.setValue(value);
        this.setLabel(label);
        this.setSortType(sortType);
    }
}

I now need to add custom columns that I will need to be dynamic. I realise that I can't make enums dynamic. What is the alternative?

Upvotes: 3

Views: 11150

Answers (1)

OldCurmudgeon
OldCurmudgeon

Reputation: 65889

If you adjust Column to implement an interface and instead of using Column elsewhere use the interface you can then grow dynamic columns using an ordinary class.

interface DbColumn {

    String getLabel();

    String getValue();
}

public enum Column implements DbColumn {

    NAME("m_Name", "Name"), ADDRESS("m_Address", "Address");

    private final String value;
    private final String label;

    private Column(String value, String label) {
        this.value = value;
        this.label = label;
    }

    @Override
    public String getLabel() {
        return label;
    }

    @Override
    public String getValue() {
        return value;
    }
}

public class DynamicColumn implements DbColumn {

    private final String value;
    private final String label;

    private DynamicColumn(String value, String label) {
        this.value = value;
        this.label = label;
    }

    @Override
    public String getLabel() {
        return label;
    }

    @Override
    public String getValue() {
        return value;
    }

}

Upvotes: 6

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