| /* |
| * 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 javax.faces.component; |
| |
| import org.apache.myfaces.core.api.shared.SharedRendererUtils; |
| import org.apache.myfaces.core.api.shared.ComponentUtils; |
| import org.apache.myfaces.core.api.shared.SelectItemsIterator; |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| import javax.el.ValueExpression; |
| import javax.faces.application.FacesMessage; |
| import javax.faces.context.ExternalContext; |
| import javax.faces.context.FacesContext; |
| import javax.faces.convert.Converter; |
| import javax.faces.convert.ConverterException; |
| import javax.faces.model.SelectItem; |
| import javax.faces.render.Renderer; |
| |
| import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFComponent; |
| import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFJspProperties; |
| import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFJspProperty; |
| import org.apache.myfaces.core.api.shared.ExternalSpecifications; |
| import org.apache.myfaces.core.api.shared.MessageUtils; |
| |
| /** |
| * Base class for the various component classes that allow a user to select zero or more options from a set. |
| * <p> |
| * This is not an abstract class; java code can create an instance of this, configure its rendererType appropriately, |
| * and add it to a view. However there is no tag class for this component, ie it cannot be added directly to a page when |
| * using JSP (and other presentation technologies are expected to behave similarly). Instead, there is a family of |
| * subclasses that extend this base functionality, and they do have tag classes. |
| * </p> |
| * <p> |
| * See the javadoc for this class in the <a href="http://java.sun.com/j2ee/javaserverfaces/1.2/docs/api/index.html">JSF |
| * Specification</a> for further details. |
| * </p> |
| */ |
| @JSFComponent(defaultRendererType = "javax.faces.Listbox") |
| @JSFJspProperties |
| (properties={ |
| @JSFJspProperty(name="hideNoSelectionOption", returnType="boolean"), |
| @JSFJspProperty(name="collectionType", returnType="java.lang.String") |
| } |
| ) |
| public class UISelectMany extends UIInput |
| { |
| public static final String COMPONENT_TYPE = "javax.faces.SelectMany"; |
| public static final String COMPONENT_FAMILY = "javax.faces.SelectMany"; |
| |
| public static final String INVALID_MESSAGE_ID = "javax.faces.component.UISelectMany.INVALID"; |
| |
| public UISelectMany() |
| { |
| setRendererType("javax.faces.Listbox"); |
| } |
| |
| @Override |
| public String getFamily() |
| { |
| return COMPONENT_FAMILY; |
| } |
| |
| public Object[] getSelectedValues() |
| { |
| return (Object[]) getValue(); |
| } |
| |
| public void setSelectedValues(Object[] selectedValues) |
| { |
| setValue(selectedValues); |
| } |
| |
| @Override |
| public ValueExpression getValueExpression(String name) |
| { |
| if (name == null) |
| { |
| throw new NullPointerException("name"); |
| } |
| |
| if (name.equals("selectedValues")) |
| { |
| return super.getValueExpression("value"); |
| } |
| else |
| { |
| return super.getValueExpression(name); |
| } |
| } |
| |
| @Override |
| public void setValueExpression(String name, ValueExpression binding) |
| { |
| if (name == null) |
| { |
| throw new NullPointerException("name"); |
| } |
| |
| if (name.equals("selectedValues")) |
| { |
| super.setValueExpression("value", binding); |
| } |
| else |
| { |
| super.setValueExpression(name, binding); |
| } |
| } |
| |
| /** |
| * @return true if Objects are different (!) |
| */ |
| @Override |
| protected boolean compareValues(Object previous, Object value) |
| { |
| if (previous == null) |
| { |
| // one is null, the other not |
| return value != null; |
| } |
| else if (value == null) |
| { |
| // one is null, the other not |
| return true; |
| } |
| else |
| { |
| if (previous instanceof Object[] && value instanceof Object[]) |
| { |
| return compareObjectArrays((Object[]) previous, (Object[]) value); |
| } |
| else if (previous instanceof Collection && value instanceof Collection) |
| { |
| return compareCollections((Collection<?>) previous, (Collection<?>) value); |
| } |
| else if (previous.getClass().isArray() && value.getClass().isArray()) |
| { |
| return comparePrimitiveArrays(previous, value); |
| } |
| else |
| { |
| // Objects have different classes |
| return true; |
| } |
| } |
| } |
| |
| private boolean compareObjectArrays(Object[] previous, Object[] value) |
| { |
| int length = value.length; |
| if (previous.length != length) |
| { |
| // different length |
| return true; |
| } |
| |
| boolean[] scoreBoard = new boolean[length]; |
| for (int i = 0; i < length; i++) |
| { |
| Object p = previous[i]; |
| boolean found = false; |
| for (int j = 0; j < length; j++) |
| { |
| if (scoreBoard[j] == false) |
| { |
| Object v = value[j]; |
| if ((p == null && v == null) || (p != null && v != null && p.equals(v))) |
| { |
| scoreBoard[j] = true; |
| found = true; |
| break; |
| } |
| } |
| } |
| if (!found) |
| { |
| return true; // current element of previous array not found in new array |
| } |
| } |
| |
| return false; // arrays are identical |
| } |
| |
| private boolean compareCollections(Collection<?> previous, Collection<?> value) |
| { |
| int length = value.size(); |
| if (previous.size() != length) |
| { |
| // different length |
| return true; |
| } |
| |
| boolean[] scoreBoard = new boolean[length]; |
| for (Iterator<?> itPrevious = previous.iterator(); itPrevious.hasNext();) |
| { |
| Object p = itPrevious.next(); |
| boolean found = false; |
| int j = 0; |
| for (Iterator<?> itValue = value.iterator(); itValue.hasNext(); j++) |
| { |
| Object v = itValue.next(); |
| if (scoreBoard[j] == false) |
| { |
| if ((p == null && v == null) || (p != null && v != null && p.equals(v))) |
| { |
| scoreBoard[j] = true; |
| found = true; |
| break; |
| } |
| } |
| } |
| if (!found) |
| { |
| return true; // current element of previous Collection not found in new Collection |
| } |
| } |
| |
| return false; // Collections are identical |
| } |
| |
| private boolean comparePrimitiveArrays(Object previous, Object value) |
| { |
| int length = Array.getLength(value); |
| if (Array.getLength(previous) != length) |
| { |
| // different length |
| return true; |
| } |
| |
| boolean[] scoreBoard = new boolean[length]; |
| for (int i = 0; i < length; i++) |
| { |
| Object p = Array.get(previous, i); |
| boolean found = false; |
| for (int j = 0; j < length; j++) |
| { |
| if (scoreBoard[j] == false) |
| { |
| Object v = Array.get(value, j); |
| if ((p == null && v == null) || (p != null && v != null && p.equals(v))) |
| { |
| scoreBoard[j] = true; |
| found = true; |
| break; |
| } |
| } |
| } |
| if (!found) |
| { |
| return true; // current element of previous array not found in new array |
| } |
| } |
| |
| return false; // arrays are identical |
| } |
| |
| @Override |
| protected void validateValue(FacesContext context, Object convertedValue) |
| { |
| Iterator<?> itemValues = _createItemValuesIterator(convertedValue); |
| |
| // verify that iterator was successfully created for convertedValue type |
| if (itemValues == null) |
| { |
| MessageUtils.addErrorMessage(context, this, INVALID_MESSAGE_ID, new Object[] { MessageUtils.getLabel( |
| context, this) }); |
| setValid(false); |
| return; |
| } |
| |
| boolean hasValues = itemValues.hasNext(); |
| |
| // if UISelectMany is required, then there must be some selected values |
| if (isRequired() && !hasValues) |
| { |
| if (getRequiredMessage() != null) |
| { |
| String requiredMessage = getRequiredMessage(); |
| context.addMessage(this.getClientId(context), new FacesMessage(FacesMessage.SEVERITY_ERROR, |
| requiredMessage, requiredMessage)); |
| } |
| else |
| { |
| MessageUtils.addErrorMessage(context, this, REQUIRED_MESSAGE_ID, |
| new Object[] { MessageUtils.getLabel(context, this) }); |
| } |
| setValid(false); |
| return; |
| } |
| |
| // run the validators if there are item values to validate, or |
| // if we are required to validate empty fields |
| if (hasValues || shouldValidateEmptyFields(context)) |
| { |
| ComponentUtils.callValidators(context, this, convertedValue); |
| } |
| |
| if (isValid() && hasValues) |
| { |
| // all selected values must match to the values of the available options |
| |
| // Since the iterator is used twice, it has sense to traverse it only once. |
| Collection<SelectItem> items = new ArrayList<>(); |
| for (Iterator<SelectItem> iter = new SelectItemsIterator(this, context); iter.hasNext();) |
| { |
| items.add(iter.next()); |
| } |
| |
| Converter converter = getConverter(); |
| while (itemValues.hasNext()) |
| { |
| Object itemValue = itemValues.next(); |
| |
| // selected value must match to one of the available options |
| // and if required is true it must not match an option with noSelectionOption set to true (since 2.0) |
| if (!_SelectItemsUtil.matchValue(context, this, itemValue, items.iterator(), converter) |
| || ( |
| this.isRequired() |
| && _SelectItemsUtil.isNoSelectionOption(context, this, itemValue, items.iterator(), |
| converter) |
| )) |
| { |
| MessageUtils.addErrorMessage(context, this, INVALID_MESSAGE_ID, |
| new Object[] { MessageUtils.getLabel(context, this) }); |
| setValid(false); |
| return; |
| } |
| } |
| } |
| } |
| |
| @Override |
| protected Object getConvertedValue(FacesContext context, Object submittedValue) throws ConverterException |
| { |
| Renderer renderer = getRenderer(context); |
| if (renderer != null) |
| { |
| return renderer.getConvertedValue(context, this, submittedValue); |
| } |
| else if (submittedValue == null) |
| { |
| return null; |
| } |
| else if (submittedValue instanceof String[]) |
| { |
| return SharedRendererUtils.getConvertedUISelectManyValue(context, this, (String[]) submittedValue); |
| } |
| return submittedValue; |
| } |
| |
| private Iterator<?> _createItemValuesIterator(Object convertedValue) |
| { |
| if (convertedValue == null) |
| { |
| return Collections.emptyList().iterator(); |
| } |
| else |
| { |
| Class<?> valueClass = convertedValue.getClass(); |
| if (valueClass.isArray()) |
| { |
| return new _PrimitiveArrayIterator(convertedValue); |
| } |
| else if (convertedValue instanceof Object[]) |
| { |
| Object[] values = (Object[]) convertedValue; |
| return Arrays.asList(values).iterator(); |
| } |
| else if (convertedValue instanceof Collection) |
| { |
| Collection<?> values = (Collection<?>) convertedValue; |
| return values.iterator(); |
| } |
| else |
| { |
| // unsupported type for iteration |
| return null; |
| } |
| } |
| } |
| |
| // Copied from javax.faces.component.UIInput |
| private boolean shouldValidateEmptyFields(FacesContext context) |
| { |
| ExternalContext ec = context.getExternalContext(); |
| Boolean validateEmptyFields = (Boolean) ec.getApplicationMap().get(VALIDATE_EMPTY_FIELDS_PARAM_NAME); |
| |
| if (validateEmptyFields == null) |
| { |
| String param = ec.getInitParameter(VALIDATE_EMPTY_FIELDS_PARAM_NAME); |
| |
| // null means the same as auto. |
| if (param == null) |
| { |
| param = "auto"; |
| } |
| else |
| { |
| // The environment variables are case insensitive. |
| param = param.toLowerCase(); |
| } |
| |
| if (param.equals("auto") && ExternalSpecifications.isBeanValidationAvailable()) |
| { |
| validateEmptyFields = true; |
| } |
| else if (param.equals("true")) |
| { |
| validateEmptyFields = true; |
| } |
| else |
| { |
| validateEmptyFields = false; |
| } |
| |
| // cache the parsed value |
| ec.getApplicationMap().put(VALIDATE_EMPTY_FIELDS_PARAM_NAME, validateEmptyFields); |
| } |
| |
| return validateEmptyFields; |
| } |
| } |