/*
* The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
* for visualizing and manipulating spatial features with geometry and attributes.
*
* Copyright (C) 2003 Vivid Solutions
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.vividsolutions.jump.workbench.ui.plugin.analysis;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jump.I18N;
import com.vividsolutions.jump.util.FlexibleDateParser;
import com.vividsolutions.jump.workbench.ui.GenericNames;
/**
* A function object for {@link Geometry} functions (which return a Geometry).
* Provides metadata about the function.
*
* @author Martin Davis
* @version 1.0
*/
public abstract class AttributePredicate
{
static AttributePredicate[] method = {
new EqualPredicate(),
new NotEqualPredicate(),
new LessThanPredicate(),
new LessThanOrEqualPredicate(),
new GreaterThanPredicate(),
new GreaterThanOrEqualPredicate(),
new ContainsPredicate(),
new StartsWithPredicate(),
};
static List getNames()
{
List names = new ArrayList();
for (int i = 0; i < method.length; i++) {
names.add(method[i].name);
}
return names;
}
static AttributePredicate getPredicate(String name)
{
for (int i = 0; i < method.length; i++) {
if (method[i].name.equals(name))
return method[i];
}
return null;
}
private static FlexibleDateParser dateParser = new FlexibleDateParser();
private String name;
private String description;
public AttributePredicate(String name)
{
this(name, null);
}
public AttributePredicate(String name, String description)
{
this.name = name;
this.description = description;
}
public String getName() { return name; }
public abstract boolean isTrue(Object arg1, Object arg2);
protected boolean compareObjects(Object arg1, Object arg2)
{
Object o2 = coerce((String) arg2, arg1);
if (o2 == null)
return false;
int comp = compareTo(arg1, o2);
if (comp == NOT_COMPARABLE) return false;
return testCompareValue(comp);
}
/**
* Subclasses calling compareObjects should override this method
* @param comp
* @return false
*/
protected boolean testCompareValue(int comp)
{
return false;
}
public static Object coerce(String constantValue, Object attrVal)
{
try {
if (attrVal instanceof Boolean) {
return new Boolean(getBooleanLoose(constantValue));
}
if (attrVal instanceof Double) {
return new Double(constantValue);
}
if (attrVal instanceof Integer) {
return new Integer(constantValue);
}
if (attrVal instanceof String) {
return constantValue;
}
if (attrVal instanceof Date) {
return dateParser.parse(constantValue, true);
}
}
catch (ParseException ex) {
// eat it
}
catch (NumberFormatException ex) {
// eat it
}
// just return it as a String
return null;
}
protected static final int NOT_COMPARABLE = Integer.MIN_VALUE;
protected static int compareTo(Object o1, Object o2) {
if (o1 instanceof Boolean && o2 instanceof Boolean)
return ((Boolean) o1).equals(o2) ? 0 : 1;
if (! (o1 instanceof Comparable)) return NOT_COMPARABLE;
if (! (o2 instanceof Comparable)) return NOT_COMPARABLE;
return ((Comparable) o1).compareTo((Comparable) o2);
}
private static boolean getBooleanLoose(String boolStr)
{
return boolStr.equalsIgnoreCase("true")
|| boolStr.equalsIgnoreCase("yes")
|| boolStr.equalsIgnoreCase("1")
|| boolStr.equalsIgnoreCase("y");
}
private static class EqualPredicate extends AttributePredicate {
public EqualPredicate() { super("="); }
public boolean isTrue(Object arg1, Object arg2) {
return compareObjects(arg1, arg2); }
protected boolean testCompareValue(int comp) { return comp == 0; }
}
private static class NotEqualPredicate extends AttributePredicate {
public NotEqualPredicate() { super("<>"); }
public boolean isTrue(Object arg1, Object arg2) {
return compareObjects(arg1, arg2); }
protected boolean testCompareValue(int comp) { return comp != 0; }
}
private static class LessThanPredicate extends AttributePredicate {
public LessThanPredicate() { super("<"); }
public boolean isTrue(Object arg1, Object arg2) {
return compareObjects(arg1, arg2);
}
protected boolean testCompareValue(int comp) { return comp < 0; }
}
private static class LessThanOrEqualPredicate extends AttributePredicate {
public LessThanOrEqualPredicate() { super("<="); }
public boolean isTrue(Object arg1, Object arg2) {
return compareObjects(arg1, arg2);
}
protected boolean testCompareValue(int comp) { return comp <= 0; }
}
private static class GreaterThanPredicate extends AttributePredicate {
public GreaterThanPredicate() { super(">"); }
public boolean isTrue(Object arg1, Object arg2) {
return compareObjects(arg1, arg2);
}
protected boolean testCompareValue(int comp) { return comp > 0; }
}
private static class GreaterThanOrEqualPredicate extends AttributePredicate {
public GreaterThanOrEqualPredicate() { super(">="); }
public boolean isTrue(Object arg1, Object arg2) {
return compareObjects(arg1, arg2);
}
protected boolean testCompareValue(int comp) { return comp >= 0; }
}
private static class ContainsPredicate extends AttributePredicate {
public ContainsPredicate() { super(GenericNames.CONTAINS); }
public boolean isTrue(Object arg1, Object arg2) {
if (arg1 == null || arg2 == null) return false;
return arg1.toString().indexOf(arg2.toString()) >= 0;
}
}
private static class StartsWithPredicate extends AttributePredicate {
public StartsWithPredicate() { super(I18N.get("ui.plugin.analysis.AttributePredicate.starts-with")); }
public boolean isTrue(Object arg1, Object arg2) {
if (arg1 == null || arg2 == null) return false;
return arg1.toString().startsWith(arg2.toString());
}
}
}