| // Copyright 2007, 2008, 2009, 2010 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry5.internal.services; |
| |
| import org.apache.tapestry5.Binding; |
| import org.apache.tapestry5.BindingConstants; |
| import org.apache.tapestry5.ComponentResources; |
| import org.apache.tapestry5.FieldTranslator; |
| import org.apache.tapestry5.FieldValidator; |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.ValidationException; |
| import org.apache.tapestry5.ValueEncoder; |
| import org.apache.tapestry5.internal.TapestryInternalUtils; |
| import org.apache.tapestry5.internal.bindings.InvariantBinding; |
| import org.apache.tapestry5.ioc.Messages; |
| import org.apache.tapestry5.ioc.internal.util.InternalUtils; |
| import org.apache.tapestry5.ioc.services.PropertyAccess; |
| import org.apache.tapestry5.runtime.Component; |
| import org.apache.tapestry5.services.BindingSource; |
| import org.apache.tapestry5.services.ComponentDefaultProvider; |
| import org.apache.tapestry5.services.FieldTranslatorSource; |
| import org.apache.tapestry5.services.FieldValidatorDefaultSource; |
| import org.apache.tapestry5.services.ValueEncoderSource; |
| |
| public class ComponentDefaultProviderImpl implements ComponentDefaultProvider |
| { |
| private final PropertyAccess propertyAccess; |
| |
| private final BindingSource bindingSource; |
| |
| private final ValueEncoderSource valueEncoderSource; |
| |
| private final FieldTranslatorSource fieldTranslatorSource; |
| |
| private final FieldValidatorDefaultSource fieldValidatorDefaultSource; |
| |
| static final FieldValidator NOOP_VALIDATOR = new FieldValidator() |
| { |
| public void validate(Object value) throws ValidationException |
| { |
| // Do nothing |
| } |
| |
| public void render(MarkupWriter writer) |
| { |
| } |
| |
| public boolean isRequired() |
| { |
| return false; |
| } |
| }; |
| |
| public ComponentDefaultProviderImpl(PropertyAccess propertyAccess, BindingSource bindingSource, |
| ValueEncoderSource valueEncoderSource, |
| FieldTranslatorSource fieldTranslatorSource, |
| FieldValidatorDefaultSource fieldValidatorDefaultSource) |
| { |
| this.propertyAccess = propertyAccess; |
| this.bindingSource = bindingSource; |
| this.valueEncoderSource = valueEncoderSource; |
| this.fieldTranslatorSource = fieldTranslatorSource; |
| this.fieldValidatorDefaultSource = fieldValidatorDefaultSource; |
| } |
| |
| public String defaultLabel(ComponentResources resources) |
| { |
| assert resources != null; |
| String componentId = resources.getId(); |
| String key = componentId + "-label"; |
| |
| Messages containerMessages = resources.getContainerResources().getMessages(); |
| |
| if (containerMessages.contains(key)) return containerMessages.get(key); |
| |
| return TapestryInternalUtils.toUserPresentable(componentId); |
| } |
| |
| public Binding defaultBinding(String parameterName, ComponentResources resources) |
| { |
| assert InternalUtils.isNonBlank(parameterName); |
| assert resources != null; |
| String componentId = resources.getId(); |
| |
| Component container = resources.getContainer(); |
| |
| // Only provide a default binding if the container actually contains the property. |
| // This sets up an error condition for when the parameter is not bound, and |
| // the binding can't be deduced. |
| |
| if (propertyAccess.getAdapter(container).getPropertyAdapter(componentId) == null) |
| return null; |
| |
| ComponentResources containerResources = resources.getContainerResources(); |
| |
| return bindingSource.newBinding( |
| "default " + parameterName, |
| containerResources, |
| BindingConstants.PROP, |
| componentId); |
| } |
| |
| @SuppressWarnings({ "unchecked" }) |
| public ValueEncoder defaultValueEncoder(String parameterName, ComponentResources resources) |
| { |
| assert InternalUtils.isNonBlank(parameterName); |
| assert resources != null; |
| Class parameterType = resources.getBoundType(parameterName); |
| |
| if (parameterType == null) return null; |
| |
| return valueEncoderSource.getValueEncoder(parameterType); |
| } |
| |
| public FieldTranslator defaultTranslator(String parameterName, ComponentResources resources) |
| { |
| return fieldTranslatorSource.createDefaultTranslator(resources, parameterName); |
| } |
| |
| public Binding defaultTranslatorBinding(final String parameterName, final ComponentResources resources) |
| { |
| String description = String.format("default translator, parameter %s of %s", |
| parameterName, resources.getCompleteId()); |
| |
| return new InvariantBinding(resources.getLocation(), FieldTranslator.class, description) |
| { |
| public Object get() |
| { |
| return defaultTranslator(parameterName, resources); |
| } |
| }; |
| } |
| |
| public FieldValidator defaultValidator(String parameterName, ComponentResources resources) |
| { |
| FieldValidator result = fieldValidatorDefaultSource.createDefaultValidator(resources, parameterName); |
| |
| return result == null ? NOOP_VALIDATOR : result; |
| } |
| |
| public Binding defaultValidatorBinding(final String parameterName, final ComponentResources resources) |
| { |
| String description = String.format("default validator, parameter %s of %s", parameterName, |
| resources.getCompleteId()); |
| |
| return new InvariantBinding(resources.getLocation(), FieldValidator.class, description) |
| { |
| public Object get() |
| { |
| return defaultValidator(parameterName, resources); |
| } |
| }; |
| } |
| } |