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173
gui/admin-gui/src/main/java/com/evolveum/midpoint/gui/impl/model/FlexibleLabelModel.java
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| /* | ||
| * Copyright (c) 2010-2017 Evolveum | ||
| * | ||
| * 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 com.evolveum.midpoint.gui.impl.model; | ||
|
|
||
| import com.evolveum.midpoint.gui.api.util.ModelServiceLocator; | ||
| import com.evolveum.midpoint.prism.*; | ||
| import com.evolveum.midpoint.prism.delta.PrismValueDeltaSetTriple; | ||
| import com.evolveum.midpoint.prism.path.ItemPath; | ||
| import com.evolveum.midpoint.prism.polystring.PolyString; | ||
| import com.evolveum.midpoint.repo.common.expression.Expression; | ||
| import com.evolveum.midpoint.repo.common.expression.ExpressionEvaluationContext; | ||
| import com.evolveum.midpoint.repo.common.expression.ExpressionFactory; | ||
| import com.evolveum.midpoint.repo.common.expression.ExpressionVariables; | ||
| import com.evolveum.midpoint.schema.constants.ExpressionConstants; | ||
| import com.evolveum.midpoint.schema.internals.InternalsConfig; | ||
| import com.evolveum.midpoint.schema.result.OperationResult; | ||
| import com.evolveum.midpoint.task.api.Task; | ||
| import com.evolveum.midpoint.util.DOMUtil; | ||
| import com.evolveum.midpoint.util.exception.ExpressionEvaluationException; | ||
| import com.evolveum.midpoint.util.exception.ObjectNotFoundException; | ||
| import com.evolveum.midpoint.util.exception.SchemaException; | ||
| import com.evolveum.midpoint.util.exception.SystemException; | ||
| import com.evolveum.midpoint.util.logging.LoggingUtils; | ||
| import com.evolveum.midpoint.util.logging.Trace; | ||
| import com.evolveum.midpoint.util.logging.TraceManager; | ||
| import com.evolveum.midpoint.web.page.error.PageError; | ||
| import com.evolveum.midpoint.xml.ns._public.common.common_3.ExpressionType; | ||
| import com.evolveum.midpoint.xml.ns._public.common.common_3.GuiFlexibleLabelType; | ||
|
|
||
| import org.apache.commons.lang.Validate; | ||
| import org.apache.poi.ss.formula.functions.T; | ||
| import org.apache.wicket.RestartResponseException; | ||
| import org.apache.wicket.model.IModel; | ||
|
|
||
| import java.util.Collection; | ||
|
|
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| import javax.xml.namespace.QName; | ||
|
|
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| /** | ||
| * Model that returns string value for a flexible label. The label value defaults to | ||
| * the value of a fixed property. But if an expression is specified then the value | ||
| * is determined by the expression. | ||
| * This implementation works on containerable models (not wrappers). | ||
| * | ||
| * @author semancik | ||
| */ | ||
| public class FlexibleLabelModel<C extends Containerable> implements IModel<String> { | ||
| private static final long serialVersionUID = 1L; | ||
|
|
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| private static final Trace LOGGER = TraceManager.getTrace(FlexibleLabelModel.class); | ||
|
|
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| private IModel<C> model; | ||
| private ItemPath path; | ||
| private GuiFlexibleLabelType configuration; | ||
| private ModelServiceLocator serviceLocator; | ||
|
|
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| public FlexibleLabelModel(IModel<C> model, QName item, ModelServiceLocator serviceLocator, GuiFlexibleLabelType configuration) { | ||
| this(model, new ItemPath(item), serviceLocator, configuration); | ||
| } | ||
|
|
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| public FlexibleLabelModel(IModel<C> model, ItemPath path, ModelServiceLocator serviceLocator, GuiFlexibleLabelType configuration) { | ||
| Validate.notNull(model, "Containerable model must not be null."); | ||
| Validate.notNull(path, "Item path must not be null."); | ||
|
|
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| this.model = model; | ||
| this.path = path; | ||
| this.configuration = configuration; | ||
| this.serviceLocator = serviceLocator; | ||
| } | ||
|
|
||
| @Override | ||
| public String getObject() { | ||
| if (configuration == null) { | ||
| return getDefaultValue(); | ||
| } else { | ||
| ExpressionType expressionType = configuration.getExpression(); | ||
| if (expressionType == null) { | ||
| return getDefaultValue(); | ||
| } else { | ||
| Task task = serviceLocator.getPageTask(); | ||
| OperationResult result = task.getResult(); | ||
| String contextDesc = "flexible label "+path+" expression"; | ||
| try { | ||
| return getExpressionValue(expressionType, contextDesc, task, result); | ||
| } catch (SchemaException | ExpressionEvaluationException | ObjectNotFoundException e) { | ||
| result.recordFatalError(e); | ||
| LoggingUtils.logUnexpectedException(LOGGER, contextDesc, e, path); | ||
| if (InternalsConfig.nonCriticalExceptionsAreFatal()) { | ||
| throw new SystemException(e.getMessage(), e); | ||
| } else { | ||
| return "[Expression error]"; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| private String getDefaultValue() { | ||
| C object = model.getObject(); | ||
| PrismProperty<?> property; | ||
| try { | ||
| property = object.asPrismContainerValue().findOrCreateProperty(path); | ||
| } catch (SchemaException ex) { | ||
| LoggingUtils.logUnexpectedException(LOGGER, "Couldn't create property in path {}", ex, path); | ||
| //todo show message in page error [lazyman] | ||
| throw new RestartResponseException(PageError.class); | ||
| } | ||
|
|
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| return getStringRealValue(property != null ? property.getRealValue() : null); | ||
| } | ||
|
|
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| private String getExpressionValue(ExpressionType expressionType, String contextDesc, Task task, OperationResult result) throws SchemaException, ExpressionEvaluationException, ObjectNotFoundException { | ||
|
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| C object = model.getObject(); | ||
| ExpressionFactory expressionFactory = serviceLocator.getExpressionFactory(); | ||
| PrismPropertyDefinition<String> outputDefinition = new PrismPropertyDefinitionImpl<>(ExpressionConstants.OUTPUT_ELEMENT_NAME, | ||
| DOMUtil.XSD_STRING, object.asPrismContainerValue().getPrismContext()); | ||
| Expression<PrismPropertyValue<String>,PrismPropertyDefinition<String>> expression = expressionFactory.makeExpression(expressionType, outputDefinition, contextDesc, task, result); | ||
| ExpressionVariables variables = new ExpressionVariables(); | ||
| variables.addVariableDefinition(ExpressionConstants.VAR_OBJECT, object); | ||
| addAdditionalExpressionVariables(variables); | ||
| ExpressionEvaluationContext context = new ExpressionEvaluationContext(null, variables, contextDesc, task, result); | ||
| PrismValueDeltaSetTriple<PrismPropertyValue<String>> outputTriple = expression.evaluate(context); | ||
| if (outputTriple == null) { | ||
| return ""; | ||
| } | ||
| Collection<PrismPropertyValue<String>> outputValues = outputTriple.getNonNegativeValues(); | ||
| if (outputValues.isEmpty()) { | ||
| return ""; | ||
| } | ||
| if (outputValues.size() > 1) { | ||
| throw new SchemaException("Expression "+contextDesc+" produced more than one value"); | ||
| } | ||
| return outputValues.iterator().next().getRealValue(); | ||
| } | ||
|
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| protected void addAdditionalExpressionVariables(ExpressionVariables variables) { | ||
| } | ||
|
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| @Override | ||
| public void setObject(String object) { | ||
| throw new UnsupportedOperationException("Model is read-only"); | ||
| } | ||
|
|
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| @Override | ||
| public void detach() { | ||
| } | ||
|
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| private <T> String getStringRealValue(T value) { | ||
| if (value == null) { | ||
| return ""; | ||
| } | ||
| if (value instanceof PolyString) { | ||
| return ((PolyString) value).getOrig(); | ||
| } | ||
|
|
||
| return value.toString(); | ||
| } | ||
| } |
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