org.eclipse.wb.internal.rcp.databinding.xwt.model.widgets.XmlObjectReferenceProvider.java Source code

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Here is the source code for org.eclipse.wb.internal.rcp.databinding.xwt.model.widgets.XmlObjectReferenceProvider.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.rcp.databinding.xwt.model.widgets;

import com.google.common.collect.Sets;

import org.eclipse.wb.core.model.ObjectInfo;
import org.eclipse.wb.internal.core.databinding.model.reference.IReferenceProvider;
import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.utils.xml.DocumentAttribute;
import org.eclipse.wb.internal.core.utils.xml.DocumentElement;
import org.eclipse.wb.internal.core.utils.xml.DocumentModelVisitor;
import org.eclipse.wb.internal.core.xml.model.XmlObjectInfo;
import org.eclipse.wb.internal.rcp.databinding.xwt.model.beans.BeansObserveTypeContainer;

import org.apache.commons.lang.ClassUtils;
import org.apache.commons.lang.StringUtils;

import java.util.Set;
import java.util.UUID;

/**
 * 
 * @author lobas_av
 * 
 */
public class XmlObjectReferenceProvider implements IReferenceProvider {
    private final XmlObjectInfo m_objectInfo;
    private final String m_defaultReference;

    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public XmlObjectReferenceProvider(XmlObjectInfo objectInfo) {
        m_objectInfo = objectInfo;
        m_defaultReference = UUID.randomUUID().toString();
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // IReferenceProvider
    //
    ////////////////////////////////////////////////////////////////////////////
    public String getReference() throws Exception {
        return StringUtils.defaultString(getName(m_objectInfo), m_defaultReference);
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Utils
    //
    ////////////////////////////////////////////////////////////////////////////
    public static String getName(ObjectInfo objectInfo) throws Exception {
        Property property = objectInfo.getPropertyByTitle("Name");
        if (property == null) {
            return null;
        }
        Object value = property.getValue();
        return value == Property.UNKNOWN_VALUE ? null : (String) value;
    }

    public static void generateName(XmlObjectInfo objectInfo) throws Exception {
        if (getName(objectInfo) == null) {
            final Set<String> variables = Sets.newHashSet();
            //
            DocumentElement rootElement = objectInfo.getElement().getRoot();
            final String[] xName = new String[1];
            //
            for (DocumentAttribute attribute : rootElement.getDocumentAttributes()) {
                String name = attribute.getName();
                String value = attribute.getValue();
                if (name.startsWith(BeansObserveTypeContainer.NAMESPACE_KEY)) {
                    if (value.equals("http://www.eclipse.org/xwt")) {
                        xName[0] = name.substring(BeansObserveTypeContainer.NAMESPACE_KEY.length()) + ":Name";
                        break;
                    }
                }
            }
            //
            rootElement.accept(new DocumentModelVisitor() {
                @Override
                public void visit(DocumentAttribute attribute) {
                    if (attribute.getName().equalsIgnoreCase(xName[0])) {
                        variables.add(attribute.getValue());
                    }
                }
            });
            //
            String baseVariable = StringUtils
                    .uncapitalize(ClassUtils.getShortClassName(objectInfo.getDescription().getComponentClass()));
            String variable = baseVariable;
            int variableIndex = 1;
            // ensure unique
            while (variables.contains(variable)) {
                variable = baseVariable + "_" + Integer.toString(variableIndex++);
            }
            //
            Property property = objectInfo.getPropertyByTitle("Name");
            property.setValue(variable);
        }
    }
}