source: josm/trunk/src/org/openstreetmap/josm/gui/tagging/TagModel.java@ 2040

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.gui.tagging;

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

public class TagModel {
        
        /** the name of the tag */
        private String name = null;
        
        /** the list of values */
        private ArrayList<String> values = null;
        
        /**
         * constructor
         */
        public TagModel() {
                values = new ArrayList<String>();
                setName("");
                setValue("");
        }
        
        /**
         * constructor 
         * @param name the tag name 
         */
        public TagModel(String name) {
                this();
                setName(name);
        }
        
        /**
         * constructor 
         * 
         * @param name the tag name 
         * @param value the tag value 
         */
        public TagModel(String name, String value) {
                this();
                setName(name);
                setValue(value);
        }
        
        /**
         * sets the name. Converts name to "" if null.
         * @param name the tag name 
         */
        public void setName(String name) {
                name = (name == null) ? "" : name;
                this.name = name; 
        }
        
        /** 
         * @return the tag name 
         */
        public String getName(){
                return name;
        }
        
        /**
         * removes all values from the list of values 
         */
        public void clearValues() {
                this.values.clear();
        }
        
        /**
         * sets a unique value for this tag. Converts value to "", if null.
         * @param value the value. 
         */
        public void setValue(String value) {
                value = (value == null) ? "" : value;
                clearValues();
                this.values.add(value);
        }
        
        /**
         * 
         * @param value the value to be checked; converted to "" if null 
         * @return true, if the values of this tag include <code>value</code>; false otherwise 
         */
        public boolean hasValue(String value) {
                value = (value == null) ? "" : value;
                return values.contains(value);
        }
        
        public void addValue(String value) {
                value = (value == null) ? "" : value;
                if (hasValue(value)) {
                        return; 
                }
                values.add(value);
        }
        
        
        /**
         * removes a value from the list of values. Converts value to "" if null
         * @param value the value 
         */
        public void removeValue(String value){
                value = (value == null) ? "" : value; 
                values.remove(value);
        }       
        
        public List<String> getValues() {
                return values;
        }
        
        public String getValue() {
                if (getValueCount() == 0) {
                        return "";
                } else if (getValueCount() == 1) {
                        return values.get(0);
                } else {
                        StringBuilder sb = new StringBuilder();                 
                        for (int i =0; i < values.size(); i++) {
                                sb.append(values.get(i));
                                if (i + 1 < values.size()) {
                                        sb.append(";");
                                }
                        }
                        return sb.toString();
                }
        }
        
        public int getValueCount() {
                return values.size();
        }
}