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https://github.com/bancika/diy-layout-creator
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bancika
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package org.diylc.presenter;
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import java.awt.Graphics2D;
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import java.awt.Image;
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import java.awt.RenderingHints;
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import java.awt.image.BufferedImage;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.swing.Icon;
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import javax.swing.ImageIcon;
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import org.apache.log4j.Logger;
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import org.diylc.common.ComponentType;
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import org.diylc.common.PropertyWrapper;
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import org.diylc.core.CreationMethod;
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import org.diylc.core.IDIYComponent;
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import org.diylc.core.IPropertyValidator;
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import org.diylc.core.annotations.ComponentDescriptor;
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import org.diylc.core.annotations.EditableProperty;
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import com.rits.cloning.Cloner;
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/**
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* Utility class with component processing methods.
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*
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* @author Branislav Stojkovic
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*/
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public class ComponentProcessor {
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private static final Logger LOG = Logger.getLogger(ComponentProcessor.class);
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private static ComponentProcessor instance;
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private Map<String, List<PropertyWrapper>> propertyCache;
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private Map<String, IPropertyValidator> propertyValidatorCache;
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private Map<String, ComponentType> componentTypeMap;
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private Cloner cloner;
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public static ComponentProcessor getInstance() {
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if (instance == null) {
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instance = new ComponentProcessor();
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}
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return instance;
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}
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private ComponentProcessor() {
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super();
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this.cloner = new Cloner();
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this.propertyCache = new HashMap<String, List<PropertyWrapper>>();
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this.componentTypeMap = new HashMap<String, ComponentType>();
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this.propertyValidatorCache = new HashMap<String, IPropertyValidator>();
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}
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public ComponentType extractComponentTypeFrom(Class<? extends IDIYComponent<?>> clazz) {
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if (componentTypeMap.containsKey(clazz.getName())) {
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return componentTypeMap.get(clazz.getName());
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}
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String name;
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String description;
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CreationMethod creationMethod;
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String category;
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String namePrefix;
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String author;
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Icon icon;
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double zOrder;
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boolean stretchable;
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if (clazz.isAnnotationPresent(ComponentDescriptor.class)) {
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ComponentDescriptor annotation = clazz.getAnnotation(ComponentDescriptor.class);
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name = annotation.name();
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description = annotation.description();
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creationMethod = annotation.creationMethod();
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category = annotation.category();
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namePrefix = annotation.instanceNamePrefix();
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author = annotation.author();
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zOrder = annotation.zOrder();
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stretchable = annotation.stretchable();
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} else {
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name = clazz.getSimpleName();
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description = "";
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creationMethod = CreationMethod.SINGLE_CLICK;
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category = "Uncategorized";
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namePrefix = "Unknown";
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author = "Unknown";
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zOrder = IDIYComponent.COMPONENT;
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stretchable = true;
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}
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icon = null;
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// Draw component icon.
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try {
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IDIYComponent<?> componentInstance = (IDIYComponent<?>) clazz.newInstance();
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Image image = new BufferedImage(Presenter.ICON_SIZE, Presenter.ICON_SIZE,
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java.awt.image.BufferedImage.TYPE_INT_ARGB);
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Graphics2D g2d = (Graphics2D) image.getGraphics();
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g2d
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.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
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RenderingHints.VALUE_ANTIALIAS_ON);
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componentInstance.drawIcon(g2d, Presenter.ICON_SIZE, Presenter.ICON_SIZE);
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icon = new ImageIcon(image);
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} catch (InstantiationException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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}
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ComponentType componentType = new ComponentType(name, description, creationMethod,
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category, namePrefix, author, icon, clazz, zOrder, stretchable);
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componentTypeMap.put(clazz.getName(), componentType);
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return componentType;
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}
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/**
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* Extracts all editable properties from the component class.
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*
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* @param clazz
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* @return
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*/
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public List<PropertyWrapper> extractProperties(Class<?> clazz) {
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if (propertyCache.containsKey(clazz.getName())) {
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return cloner.deepClone(propertyCache.get(clazz.getName()));
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}
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List<PropertyWrapper> properties = new ArrayList<PropertyWrapper>();
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for (Method method : clazz.getMethods()) {
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if (method.getName().startsWith("get")) {
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try {
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if (method.isAnnotationPresent(EditableProperty.class)
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&& !method.isAnnotationPresent(Deprecated.class)) {
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EditableProperty annotation = method.getAnnotation(EditableProperty.class);
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String name;
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if (annotation.name().equals("")) {
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name = method.getName().substring(3);
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} else {
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name = annotation.name();
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}
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IPropertyValidator validator = getPropertyValidator(annotation
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.validatorClass());
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Method setter = clazz.getMethod("set" + method.getName().substring(3),
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method.getReturnType());
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PropertyWrapper property = new PropertyWrapper(name,
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method.getReturnType(), method, setter, annotation.defaultable(),
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validator);
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properties.add(property);
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}
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} catch (NoSuchMethodException e) {
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LOG.debug("No matching setter found for \"" + method.getName()
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+ "\". Skipping...");
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}
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}
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}
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propertyCache.put(clazz.getName(), properties);
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return cloner.deepClone(properties);
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}
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/**
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* Returns properties mutual for all the selected components.
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*
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* @param selectedComponents
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* @return
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*/
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public List<PropertyWrapper> getMutualSelectionProperties(
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List<IDIYComponent<?>> selectedComponents) throws Exception {
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if (selectedComponents.isEmpty()) {
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return null;
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}
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List<PropertyWrapper> properties = new ArrayList<PropertyWrapper>();
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IDIYComponent<?> firstComponent = selectedComponents.get(0);
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properties.addAll(extractProperties(firstComponent.getClass()));
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// Initialize values
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for (PropertyWrapper property : properties) {
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property.readFrom(firstComponent);
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}
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for (int i = 1; i < selectedComponents.size(); i++) {
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IDIYComponent<?> component = selectedComponents.get(i);
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List<PropertyWrapper> newProperties = extractProperties(component.getClass());
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for (PropertyWrapper property : newProperties) {
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property.readFrom(component);
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}
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properties.retainAll(newProperties);
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// for (PropertyWrapper property : properties) {
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// try {
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// property.readUniqueFrom(component);
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// } catch (Exception e) {
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// // TODO Auto-generated catch block
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// e.printStackTrace();
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// }
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// }
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}
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Collections.sort(properties, ComparatorFactory.getInstance().getPropertyNameComparator());
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return properties;
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}
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private IPropertyValidator getPropertyValidator(Class<? extends IPropertyValidator> clazz) {
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if (propertyValidatorCache.containsKey(clazz.getName())) {
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return propertyValidatorCache.get(clazz.getName());
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}
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IPropertyValidator validator;
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try {
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validator = clazz.newInstance();
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} catch (Exception e) {
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LOG.error("Could not instantiate validator for " + clazz.getName(), e);
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return null;
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}
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propertyValidatorCache.put(clazz.getName(), validator);
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return validator;
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}
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}
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