com.google.gdt.eclipse.designer.uibinder.parser.UiBinderDescriptionProcessor.java Source code

Introduction

Here is the source code for com.google.gdt.eclipse.designer.uibinder.parser.UiBinderDescriptionProcessor.java

Source

/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * 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.google.gdt.eclipse.designer.uibinder.parser;

import com.google.common.collect.Sets;

import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.xml.model.EditorContext;
import org.eclipse.wb.internal.core.xml.model.XmlObjectInfo;
import org.eclipse.wb.internal.core.xml.model.description.ComponentDescription;
import org.eclipse.wb.internal.core.xml.model.description.GenericPropertyDescription;
import org.eclipse.wb.internal.core.xml.model.description.IDescriptionProcessor;

import org.apache.commons.lang.StringUtils;

import java.util.List;
import java.util.Set;

/**
 * {@link IDescriptionProcessor} for UiBinder.
 * 
 * @author scheglov_ke
 * @coverage XWT.parser
 */
public class UiBinderDescriptionProcessor implements IDescriptionProcessor {
    ////////////////////////////////////////////////////////////////////////////
    //
    // Instance
    //
    ////////////////////////////////////////////////////////////////////////////
    public static final IDescriptionProcessor INSTANCE = new UiBinderDescriptionProcessor();

    private UiBinderDescriptionProcessor() {
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // IDescriptionProcessor
    //
    ////////////////////////////////////////////////////////////////////////////
    public void process(EditorContext context, ComponentDescription componentDescription) throws Exception {
        if (context instanceof UiBinderContext) {
            removeAmbiguousProperties(componentDescription);
        }
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Utils
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * @return <code>true</code> if given {@link XmlObjectInfo} is UiBinder.
     */
    public static boolean isUiBinder(XmlObjectInfo object) {
        EditorContext context = object.getContext();
        return context instanceof UiBinderContext;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Implementation
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * UiBinder does not allow attributes for setter which differs only in type, so we should not
     * create {@link Property}s for them, unless String.
     */
    private void removeAmbiguousProperties(ComponentDescription componentDescription) {
        List<GenericPropertyDescription> properties = componentDescription.getProperties();
        // prepare duplicate names of properties
        Set<String> propertyNames = Sets.newHashSet();
        Set<String> duplicateNames = Sets.newHashSet();
        for (GenericPropertyDescription propertyDescription : properties) {
            String title = propertyDescription.getTitle();
            String name = StringUtils.substringBefore(title, "(");
            if (propertyNames.contains(name)) {
                duplicateNames.add(name);
            } else {
                propertyNames.add(name);
            }
        }
        // if name of property is duplicate, remove it
        for (GenericPropertyDescription propertyDescription : properties) {
            String title = propertyDescription.getTitle();
            String name = StringUtils.substringBefore(title, "(");
            if (duplicateNames.contains(name) && propertyDescription.getType() != String.class) {
                propertyDescription.setEditor(null);
            }
        }
    }
}