org.apache.shale.test.mock.MockValueBinding Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.shale.test.mock;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.faces.application.Application;
import javax.faces.component.StateHolder;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.PropertyNotFoundException;
import javax.faces.el.PropertyResolver;
import javax.faces.el.ReferenceSyntaxException;
import javax.faces.el.ValueBinding;
import javax.faces.el.VariableResolver;
/**
* Mock implementation of ValueBinding.
*/
public class MockValueBinding extends ValueBinding implements StateHolder {
// ------------------------------------------------------------ Constructors
/**
* Construct a default instance.
*/
public MockValueBinding() {
this(null, null);
}
/**
* Construct a new value binding for the specified expression.
*
* @param application Application instance to be wrapped
* @param ref Expression to be wrapped
*/
public MockValueBinding(Application application, String ref) {
this.application = application;
if (ref != null) {
if (ref.startsWith("#{") && ref.endsWith("}")) {
ref = ref.substring(2, ref.length() - 1);
}
}
this.ref = ref;
}
// ----------------------------------------------------- Mock Object Methods
/**
* Return the expression string for this value binding.
*/
public String ref() {
return this.ref;
}
// ------------------------------------------------------ Instance Variables
/**
* The Application instance for this application.
*/
private transient Application application; // Restored as necessary
/**
* The expression this value binding will evaluate.
*/
private String ref;
// ---------------------------------------------------- ValueBinding Methods
/** {@inheritDoc} */
public Object getValue(FacesContext context)
throws EvaluationException, PropertyNotFoundException {
if (context == null) {
throw new NullPointerException();
}
List names = parse(ref);
// Resolve the variable name
VariableResolver vr = application().getVariableResolver();
String name = (String) names.get(0);
Object base = vr.resolveVariable(context, name);
if (names.size() < 2) {
return (base);
}
// Resolve the property names
PropertyResolver pr = application().getPropertyResolver();
for (int i = 1; i < names.size(); i++) {
base = pr.getValue(base, (String) names.get(i));
}
// Return the resolved value
return (base);
}
/** {@inheritDoc} */
public void setValue(FacesContext context, Object value)
throws EvaluationException, PropertyNotFoundException {
if (context == null) {
throw new NullPointerException();
}
List names = parse(ref);
// Resolve the variable name
VariableResolver vr = application().getVariableResolver();
String name = (String) names.get(0);
Object base = vr.resolveVariable(context, name);
if (names.size() < 2) {
if ("applicationScope".equals(name)
|| "requestScope".equals(name)
|| "sessionScope".equals(name)) {
throw new ReferenceSyntaxException("Cannot set '"
+ name + "'");
}
Map map = econtext().getRequestMap();
if (map.containsKey(name)) {
map.put(name, value);
return;
}
map = econtext().getSessionMap();
if ((map != null) && (map.containsKey(name))) {
map.put(name, value);
return;
}
map = econtext().getApplicationMap();
if (map.containsKey(name)) {
map.put(name, value);
return;
}
econtext().getRequestMap().put(name, value);
return;
}
// Resolve the property names
PropertyResolver pr = application().getPropertyResolver();
for (int i = 1; i < (names.size() - 1); i++) {
// System.out.println(" property=" + names.get(i));
base = pr.getValue(base, (String) names.get(i));
}
// Update the last property
pr.setValue(base, (String) names.get(names.size() - 1), value);
}
/** {@inheritDoc} */
public boolean isReadOnly(FacesContext context)
throws PropertyNotFoundException {
if (context == null) {
throw new NullPointerException();
}
List names = parse(ref);
// Resolve the variable name
VariableResolver vr = application().getVariableResolver();
String name = (String) names.get(0);
Object base = vr.resolveVariable(context, name);
if (names.size() < 2) {
return true;
}
// Resolve the property names
PropertyResolver pr = application().getPropertyResolver();
for (int i = 1; i < names.size() - 1; i++) {
base = pr.getValue(base, (String) names.get(i));
}
// Return the read only state of the final property
return pr.isReadOnly(base, (String) names.get(names.size() - 1));
}
/** {@inheritDoc} */
public Class getType(FacesContext context)
throws PropertyNotFoundException {
if (context == null) {
throw new NullPointerException();
}
List names = parse(ref);
// Resolve the variable name
VariableResolver vr = application().getVariableResolver();
String name = (String) names.get(0);
Object base = vr.resolveVariable(context, name);
if (names.size() < 2) {
return base.getClass();
}
// Resolve the property names
PropertyResolver pr = application().getPropertyResolver();
for (int i = 1; i < names.size() - 1; i++) {
base = pr.getValue(base, (String) names.get(i));
}
// Return the type of the final property
return pr.getType(base, (String) names.get(names.size() - 1));
}
/** {@inheritDoc} */
public String getExpressionString() {
return "#{" + ref + "}";
}
// ----------------------------------------------------- StateHolder Methods
/** {@inheritDoc} */
public Object saveState(FacesContext context) {
Object[] values = new Object[1];
values[0] = ref;
return values;
}
/** {@inheritDoc} */
public void restoreState(FacesContext context, Object state) {
Object[] values = (Object[]) state;
ref = (String) values[0];
}
/**
* Flag indicating that this value is transient.
*/
private boolean transientFlag = false;
/** {@inheritDoc} */
public boolean isTransient() {
return this.transientFlag;
}
/** {@inheritDoc} */
public void setTransient(boolean transientFlag) {
this.transientFlag = transientFlag;
}
// --------------------------------------------------------- Private Methods
/**
* Return the relevant Application instance.
*/
private Application application() {
if (application == null) {
application = FacesContext.getCurrentInstance().getApplication();
}
return (application);
}
/**
* Return the relevant ExternalContext instance.
*/
private ExternalContext econtext() {
return (FacesContext.getCurrentInstance().getExternalContext());
}
/**
* Return a list of the expression elements in this expression.
*
* @param ref Expression to be parsed
*/
private List parse(String ref) {
List names = new ArrayList();
StringBuffer expr = new StringBuffer(ref);
boolean isBlockOn = false;
for (int i = expr.length() - 1; i > -1; i--) {
if (expr.charAt(i) == ' ') {
expr.deleteCharAt(i);
} else if (expr.charAt(i) == ']') {
expr.deleteCharAt(i);
} else if (expr.charAt(i) == '[') {
expr.deleteCharAt(i);
} else if (expr.charAt(i) == '\'') {
if (!isBlockOn) {
expr.deleteCharAt(i);
} else {
names.add(0, expr.substring(i + 1));
expr.delete(i, expr.length());
}
isBlockOn = !isBlockOn;
} else if (expr.charAt(i) == '.' && !isBlockOn) {
names.add(0, expr.substring(i + 1));
expr.delete(i, expr.length());
}
}
if (expr.length() > 0) {
names.add(0, expr.toString());
}
if (names.size() < 1) {
throw new ReferenceSyntaxException("No expression in '"
+ ref + "'");
}
for (int i = 0; i < names.size(); i++) {
String name = (String) names.get(i);
if (name.length() < 1) {
throw new ReferenceSyntaxException("Invalid expression '"
+ ref + "'");
}
}
return (names);
}
}