package com.onaro.util.jfc.tables.filter;

import java.util.ArrayList;
import java.util.List;

public abstract class AbstractSelectionFilter<E> extends AbstractFilter implements FilterEditorProvider {
    public static final String ALL_TEXT = Messages.INSTANCE.getAllText();
    public static final String EMPTY_TEXT = Messages.INSTANCE.getEmptyText();

    private List<Object> allValues;


    public AbstractSelectionFilter() {
        allValues = new ArrayList<Object>();
        allValues.add(ALL_TEXT);
        allValues.add(EMPTY_TEXT);
    }

    protected void parsePattern() throws FilterException {
        if(ALL_TEXT.equals(pattern)) pattern = null;
    }

    /**
     * Tests if the selected value that was defined in the pattern
     *
     * @param value the value to test
     * @return true if the value matches this filter
     */
    public boolean isAccepted(Object value) {
        assert pattern != null : "this method should not be called if the isActive() is false - pattern==null"; //$NON-NLS-1$
        if (EMPTY_TEXT.equals(pattern)) {
            return value == null || value.toString().length() == 0;
        } else {
            return pattern.equals(value);
        }
    }


    public List<Object> getAllValues() {
        return allValues;
    }

    protected void add(E e) {
        allValues.add(e);
    }
}