Allow primary keys to be any type, and test it.

[online-glom:gwt-glom.git] / src / main / java / org / glom / web / shared / TypedDataItem.java

/*
 * Copyright (C) 2011 Openismus GmbH
 *
 * This file is part of GWT-Glom.
 *
 * GWT-Glom is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.glom.web.shared;

import java.util.Date;

import org.glom.web.shared.libglom.Field.GlomFieldType;

/**
 * This specialization of DataItem can hold a primary key item.
 */
@SuppressWarnings("serial")
public class TypedDataItem extends DataItem {
        private boolean empty = true;
        private GlomFieldType type = GlomFieldType.TYPE_INVALID;
        private String unknown = null;

        public TypedDataItem() {
        }

        public boolean isEmpty() {
                return empty;
        }

        /** Get the value.
         * 
         * This is a generic alternative to getNumber(), getText(), etc.
         * @return
         */
        public Object getValue() {
                switch(type) {
                case TYPE_NUMERIC:
                        return getNumber();
                case TYPE_TEXT:
                        return getText();
                case TYPE_DATE:
                        return getDate();
                //TODO: case TYPE_TIME:
                //      return getTime();
                case TYPE_BOOLEAN:
                        return getBoolean();
                case TYPE_IMAGE:
                        return getImageData();
                case TYPE_INVALID:
                        return "value-with-invalid-type";
                default:
                        return "value-with-unknown-type";
                }
        }

        //TODO: Why is this override necessary?
        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.shared.DataItem#setBoolean(boolean)
         */
        @Override
        public void setBoolean(final boolean bool) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_BOOLEAN;
                super.setBoolean(bool);
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.shared.DataItem#setNumber(double)
         */
        @Override
        public void setNumber(final double number) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_NUMERIC;
                super.setNumber(number);
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.shared.DataItem#setText(java.lang.String)
         */
        @Override
        public void setText(final String text) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_TEXT;
                super.setText(text);
        }
        
        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.shared.DataItem#setNumber(double)
         */
        @Override
        public void setDate(final Date date) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_DATE;
                super.setDate(date);
        }

        public void setImageData(final byte[] imageData) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_IMAGE;
                super.setImageData(imageData);
        }

        public void setImageDataUrl(final String image) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_IMAGE;
                super.setImageDataUrl(image);
        }
        

        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.shared.DataItem#setText(java.lang.String)
         */
        public void setUnknown(final String value) {
                this.empty = false;
                this.type = GlomFieldType.TYPE_INVALID;
                this.unknown = value;
        }

        public String getUnknown() {
                return unknown;
        }

        public GlomFieldType getType() {
                return type;
        }

}