simpleformatkit.java

esri的ArcGIS Server超级学习模板程序（for java）

package com.esri.solutions.jitk.web.data.results;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;

public class SimpleFormatKit implements FormatKit {

    /**
     * Literal to be used for formatting null values. Can be null.
     */
    private String nullLiteral;
    
    /**
     * List of available formatters.
     */
    private List<ValueFormat> formats;
    
    /**
     * The default format to use if no other matching formatter can be found.
     *
     */
    private ValueFormat defaultFormat = new DefaultValueFormat();
    
    public SimpleFormatKit() {
        this(getDefaultFormats());
    }
    
    public SimpleFormatKit(List<ValueFormat> formats) {
        setFormats(formats);
    }
    
    public String getNullLiteral() {
        return nullLiteral;
    }
    
    public void setNullLiteral(String nullLiteral) {
        this.nullLiteral = nullLiteral;
    }
    
    public void setFormats(List<ValueFormat> formats) {
        if (formats == null) {
            this.formats = new ArrayList<ValueFormat>();
        } else {
            this.formats = formats;
        }
    }
    
    public String format(Object value, Locale locale) {
        if (value == null) {
            // should the null literal should be locale specific?
            return nullLiteral == null ? null : nullLiteral.toString(); 
        }
        
        for (ValueFormat format : formats) {
           if (format.canFormat(value.getClass())) {
               return format.format(value, locale);
           }
        }
        return defaultFormat.format(value);
    }

    public String format(Object value) {
        return format(value, Locale.getDefault());
    }
    
    public static List<ValueFormat> getDefaultFormats() {
        List<ValueFormat> defaultFormats = new ArrayList<ValueFormat>();
        defaultFormats.add(new NumberValueFormat());
        defaultFormats.add(new StringValueFormat());
        return Collections.unmodifiableList(defaultFormats);
    }
    
    @SuppressWarnings("unchecked")
	public ValueFormat[] getFormats(Class[] types) {
        ValueFormat[] formatArr = new ValueFormat[types.length];
        for (int i = 0; i < types.length; i++) {
            outer:
                for (ValueFormat format : formats) {
                    if (format.canFormat(types[i])) {
                        formatArr[i] = format;
                        continue outer;
                    }
                }
                formatArr[i] = defaultFormat;                
        }
        return formatArr; 
    }
}