/**
* Copyright (C) 2009-2010 Wilfred Springer
*
* This file is part of Preon.
*
* Preon 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, or (at your option) any later version.
*
* Preon 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
* Preon; see the file COPYING. If not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Linking this library statically or dynamically with other modules is making a
* combined work based on this library. Thus, the terms and conditions of the
* GNU General Public License cover the whole combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent modules, and
* to copy and distribute the resulting executable under terms of your choice,
* provided that you also meet, for each linked independent module, the terms
* and conditions of the license of that module. An independent module is a
* module which is not derived from or based on this library. If you modify this
* library, you may extend this exception to your version of the library, but
* you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.codehaus.preon.el.ctx;
import org.junit.Test;
import static org.junit.Assert.*;
import org.codehaus.preon.el.BindingException;
import org.codehaus.preon.el.Document;
import org.codehaus.preon.el.InvalidExpressionException;
import org.codehaus.preon.el.Reference;
import org.codehaus.preon.el.util.StringBuilderDocument;
public class VariableContextTest {
@Test
public void testPropertySelectors() {
final Data data = new Data();
data.data = new Data();
data.data.str = "foobar";
VariableDefinitions defs = new DataVariableDefinitions();
VariableContext context = new VariableContext(defs);
Reference<VariableResolver> reference = context.selectAttribute("data");
reference = reference.selectAttribute("data");
reference = reference.selectAttribute("str");
assertEquals("foobar", reference.resolve(new DataResolver(data)));
}
@Test
public void testIndexSelectors() throws InvalidExpressionException {
final Data data = new Data();
data.datas = new Data[2];
data.datas[0] = new Data();
data.datas[1] = new Data();
data.datas[0].str = "foo";
data.datas[1].str = "bar";
VariableDefinitions defs = new DataVariableDefinitions();
VariableContext context = new VariableContext(defs);
Reference<VariableResolver> reference = context.selectAttribute("data");
reference = reference.selectAttribute("datas");
reference = reference.selectItem("1");
reference = reference.selectAttribute("str");
assertEquals("bar", reference.resolve(new DataResolver(data)));
}
@Test
public void testReferenceEquality() throws InvalidExpressionException {
VariableDefinitions defs = new DataVariableDefinitions();
VariableContext context = new VariableContext(defs);
Reference<VariableResolver> reference = context.selectAttribute("data");
// VariableReference equality
assertEquals(reference, reference);
// PropertyReference equality
reference = reference.selectAttribute("data");
assertEquals(reference, reference);
// IndexReference equality
reference = reference.selectItem("data.number");
assertEquals(reference, reference);
}
@Test
public void testDocumentation() throws InvalidExpressionException {
VariableDefinitions defs = new DataVariableDefinitions();
VariableContext context = new VariableContext(defs);
Reference<VariableResolver> reference = context.selectAttribute("data");
Document document = null;
document = new StringBuilderDocument();
reference.document(document);
assertEquals("the data", document.toString());
documentProperty(reference);
documentArrayElement(context, reference);
documentPropertyOfArrayElement(context, reference);
}
private void documentArrayElement(VariableContext context,
Reference<VariableResolver> reference)
throws InvalidExpressionException {
Document document;
reference = reference.selectAttribute("datas");
reference = reference.selectItem("1");
document = new StringBuilderDocument();
reference.document(document);
assertEquals("the second element of the datas (a Data[]) of the data",
document.toString());
}
private void documentPropertyOfArrayElement(VariableContext context,
Reference<VariableResolver> reference)
throws InvalidExpressionException {
Document document;
reference = reference.selectAttribute("datas");
reference = reference.selectItem("1");
reference = reference.selectAttribute("number");
document = new StringBuilderDocument();
reference.document(document);
assertEquals(
"the number (a int) of the second element of the datas (a Data[]) of the data",
document.toString());
}
private void documentProperty(Reference<VariableResolver> reference) {
Document document;
reference = reference.selectAttribute("number");
document = new StringBuilderDocument();
reference.document(document);
assertEquals("the number (a int) of the data", document.toString());
}
public static class Data {
public int number;
public Data data;
public String str;
public Data[] datas;
public int[] ints;
}
public static class DataResolver implements VariableResolver {
private Data data;
public DataResolver(Data data) {
this.data = data;
}
public Object get(String name) {
if ("data".equals(name)) {
return data;
} else {
throw new BindingException("No such variable: " + name); // TODO
}
}
}
private static class DataVariableDefinitions implements VariableDefinitions {
public String[] getNames() {
return new String[] { "data" };
}
public Class getType(String name) {
return Data.class;
}
public void document(Document target) {
target.text("an object with variable data");
}
}
}