QNamespaceValueBinding.java

/*******************************************************************************
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * Contributors:
 *               Kamesh Sampath - initial implementation
 *******************************************************************************/

package com.liferay.ide.portlet.core.model.internal;

import com.liferay.ide.portlet.core.util.PortletAppModelConstants;

import java.util.List;

import org.eclipse.sapphire.Property;
import org.eclipse.sapphire.modeling.xml.XmlAttribute;
import org.eclipse.sapphire.modeling.xml.XmlElement;
import org.eclipse.sapphire.modeling.xml.XmlNode;
import org.eclipse.sapphire.modeling.xml.XmlPath;
import org.eclipse.sapphire.modeling.xml.XmlValueBindingImpl;
import org.eclipse.sapphire.modeling.xml.annotations.CustomXmlValueBinding;
import org.w3c.dom.Attr;

/**
 * @author Kamesh Sampath
 */
public class QNamespaceValueBinding extends XmlValueBindingImpl
{

    String[] params;
    XmlPath path;

    /*
     * (non-Javadoc)
     * @see org.eclipse.sapphire.modeling.PropertyBinding#init(org.eclipse.sapphire.modeling.Element,
     * org.eclipse.sapphire.modeling.Property, java.lang.String[])
     */
    @Override
    public void init( Property property )
    {
        super.init( property );

        this.params = property.definition().getAnnotation( CustomXmlValueBinding.class ).params();
        this.path = new XmlPath( params[0], resource().getXmlNamespaceResolver() );
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.sapphire.modeling.ValuePropertyBinding#read()
     */
    @Override
    public String read()
    {
        String value = null;
        XmlElement parent = xml( false );
        XmlElement qNameElement = null;
        // Fix for Alias QName not displayed in list
        if( parent.getLocalName().equals( params[0] ) )
        {
            qNameElement = parent;
        }
        else
        {
            qNameElement = parent.getChildElement( params[0], false );
        }
        if( qNameElement != null )
        {
            // System.out.println( qNameElement );
            List<XmlAttribute> listOfAttibutes = qNameElement.getAttributes();
            XmlAttribute xmlAttribute =
                listOfAttibutes != null && listOfAttibutes.size() > 0 ? listOfAttibutes.get( 0 ) : null;
            if( xmlAttribute != null )
            {
                value = xmlAttribute.getText();
            }
        }

        // System.out.println( "QNamespaceValueBinding.read() - Value:" + value );

        return value != null ? value.trim() : value;
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.sapphire.modeling.ValuePropertyBinding#write(java.lang.String)
     */
    @Override
    public void write( String value )
    {
        String val = value;

        // System.out.println( "VALUE ___________________ " + val );

        XmlElement parent = xml( true );
        /*
         * In some cases the parent node and the child nodes will be same, we need to ensure that we dont create them
         * accidentally again
         */
        // System.out.println( "QNamespaceValueBinding.write() - Parent local name:" + parent.getLocalName() );
        XmlElement qNameElement = null;
        if( parent.getLocalName().equals( params[0] ) )
        {
            qNameElement = parent;
        }
        else
        {
            qNameElement = parent.getChildElement( params[0], true );
        }

        if( qNameElement != null && val != null )
        {
            // System.out.println( "QNamespaceValueBinding.write() - 1" );
            val = value.trim();
            org.w3c.dom.Element qnameDef = qNameElement.getDomNode();
            /*
             * Check to ensure that the attribute is not added multiple times, check if the attribute already exist if
             * yes remove it add add it afresh
             */
            Attr oldQnsAttribute = qnameDef.getAttributeNode( PortletAppModelConstants.DEFAULT_QNAME_NS_DECL );
            if( oldQnsAttribute == null )
            {
                // System.out.println( "QNamespaceValueBinding.write() - Attrib does not exist" );
                qnameDef.setAttributeNS(
                    PortletAppModelConstants.XMLNS_NS_URI, PortletAppModelConstants.DEFAULT_QNAME_NS_DECL, val );
            }
            else
            {
                // System.out.println( "QNamespaceValueBinding.write() - Attrib  exist" );
                qnameDef.removeAttributeNode( oldQnsAttribute );
                qnameDef.setAttributeNS(
                    PortletAppModelConstants.XMLNS_NS_URI, PortletAppModelConstants.DEFAULT_QNAME_NS_DECL, val );
            }

        }// Remove the nod/e if it exists and current value is null
        else if( qNameElement != null && val == null )
        {
            qNameElement.remove();
        }

    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.sapphire.modeling.xml.XmlValuePropertyBinding#getXmlNode()
     */
    @Override
    public XmlNode getXmlNode()
    {
        final XmlElement element = xml( false );
        if( element != null )
        {
            return element.getChildNode( this.path, false );
        }

        return null;
    }

}