org.eclipse.wb.internal.core.xml.model.description.rules.CreatePropertiesPropertyDescriptorRule.java Source code

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Here is the source code for org.eclipse.wb.internal.core.xml.model.description.rules.CreatePropertiesPropertyDescriptorRule.java

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/*******************************************************************************
 * Copyright (c) 2011 Google, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Google, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.wb.internal.core.xml.model.description.rules;

import org.eclipse.wb.internal.core.model.property.editor.PropertyEditor;
import org.eclipse.wb.internal.core.utils.GenericTypeResolver;
import org.eclipse.wb.internal.core.utils.GenericsUtils;
import org.eclipse.wb.internal.core.utils.execution.ExecutionUtils;
import org.eclipse.wb.internal.core.utils.execution.RunnableObjectEx;
import org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils;
import org.eclipse.wb.internal.core.xml.model.description.ComponentDescription;
import org.eclipse.wb.internal.core.xml.model.description.DescriptionPropertiesHelper;
import org.eclipse.wb.internal.core.xml.model.description.GenericPropertyDescription;
import org.eclipse.wb.internal.core.xml.model.property.accessor.ExpressionAccessor;
import org.eclipse.wb.internal.core.xml.model.property.accessor.MethodExpressionAccessor;
import org.eclipse.wb.internal.core.xml.model.property.converter.ExpressionConverter;

import org.apache.commons.digester.Rule;
import org.apache.commons.lang.StringUtils;
import org.xml.sax.Attributes;

import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.List;

/**
 * The {@link Rule} that adds {@link GenericPropertyDescription}s for {@link PropertyDescriptor}s.
 * 
 * @author scheglov_ke
 * @coverage XML.model.description
 */
public final class CreatePropertiesPropertyDescriptorRule extends Rule {
    ////////////////////////////////////////////////////////////////////////////
    //
    // Rule
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    public void begin(String namespace, String name, Attributes attributes) throws Exception {
        ComponentDescription componentDescription = (ComponentDescription) digester.peek();
        List<PropertyDescriptor> descriptors = ReflectionUtils.getPropertyDescriptors(null,
                componentDescription.getComponentClass());
        for (PropertyDescriptor propertyDescriptor : descriptors) {
            addSingleProperty(componentDescription, propertyDescriptor);
        }
    }

    private void addSingleProperty(ComponentDescription componentDescription, PropertyDescriptor propertyDescriptor)
            throws Exception {
        Method setMethod = propertyDescriptor.getWriteMethod();
        if (setMethod == null) {
            return;
        }
        if (!ReflectionUtils.isPublic(setMethod)) {
            return;
        }
        // prepare description parts
        String title = propertyDescriptor.getName();
        String attribute = StringUtils.substringBeforeLast(StringUtils.uncapitalize(title), "(");
        Method getMethod = propertyDescriptor.getReadMethod();
        Class<?> propertyType = resolvePropertyType(componentDescription, setMethod);
        // prepare property parts
        String id = setMethod.getName() + "(" + ReflectionUtils.getFullyQualifiedName(propertyType, false) + ")";
        ExpressionAccessor accessor = new MethodExpressionAccessor(attribute, setMethod, getMethod);
        ExpressionConverter converter = DescriptionPropertiesHelper.getConverterForType(propertyType);
        PropertyEditor editor = DescriptionPropertiesHelper.getEditorForType(propertyType);
        // create property
        GenericPropertyDescription property = new GenericPropertyDescription(id, title, propertyType, accessor);
        property.setConverter(converter);
        property.setEditor(editor);
        // add property
        componentDescription.addProperty(property);
    }

    private static Class<?> resolvePropertyType(ComponentDescription componentDescription, Method setMethod) {
        Class<?> propertyType = setMethod.getParameterTypes()[0];
        final Type genericPropertyType = setMethod.getGenericParameterTypes()[0];
        if (genericPropertyType instanceof TypeVariable<?>) {
            final Class<?> declaringClass = setMethod.getDeclaringClass();
            final Class<?> actualClass = componentDescription.getComponentClass();
            return ExecutionUtils.runObjectIgnore(new RunnableObjectEx<Class<?>>() {
                public Class<?> runObject() throws Exception {
                    String typeName = GenericsUtils.getTypeName(
                            GenericTypeResolver.superClass(GenericTypeResolver.EMPTY, actualClass, declaringClass),
                            genericPropertyType);
                    return actualClass.getClassLoader().loadClass(typeName);
                }
            }, propertyType);
        }
        return propertyType;
    }
}