Package org.apache.tapestry.contrib.informal

Source Code of org.apache.tapestry.contrib.informal.InheritInformalAny

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*
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* reserved.
*
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* modification, are permitted provided that the following conditions
* are met:
*
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*    notice, this list of conditions and the following disclaimer.
*
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*    if any, must include the following acknowledgment:
*       "This product includes software developed by the
*        Apache Software Foundation (http://apache.org/)."
*    Alternately, this acknowledgment may appear in the software itself,
*    if and wherever such third-party acknowledgments normally appear.
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*    must not be used to endorse or promote products derived from this
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*    or "Tapestry", nor may "Apache" or "Tapestry" appear in their
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* SUCH DAMAGE.
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*
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* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/

package org.apache.tapestry.contrib.informal;

import java.util.Iterator;
import java.util.Map;

import org.apache.tapestry.AbstractComponent;
import org.apache.tapestry.IAsset;
import org.apache.tapestry.IBinding;
import org.apache.tapestry.IComponent;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.spec.IComponentSpecification;

/**
*
*  A version of the Any component that inherits the informal attributes of its parent
*
@version $Id: InheritInformalAny.java,v 1.4 2003/04/16 16:43:19 hlship Exp $
@author mindbridge
@since 2.2
*
**/

public class InheritInformalAny extends AbstractComponent
{
    // Bindings
    private IBinding m_objElementBinding;

    public IBinding getElementBinding()
    {
        return m_objElementBinding;
    }

    public void setElementBinding(IBinding objElementBinding)
    {
        m_objElementBinding = objElementBinding;
    }

    protected void generateParentAttributes(IMarkupWriter writer, IRequestCycle cycle)
    {
        String attribute;

        IComponent objParent = getContainer();
        if (objParent == null)
            return;

        IComponentSpecification specification = objParent.getSpecification();
        Map bindings = objParent.getBindings();
        if (bindings == null)
            return;

        Iterator i = bindings.entrySet().iterator();

        while (i.hasNext())
        {
            Map.Entry entry = (Map.Entry) i.next();
            String name = (String) entry.getKey();

            // Skip over formal parameters stored in the bindings
            // Map.  We're just interested in informal parameters.

            if (specification.getParameter(name) != null)
                continue;

            IBinding binding = (IBinding) entry.getValue();

            Object value = binding.getObject();
            if (value == null)
                continue;

            if (value instanceof IAsset)
            {
                IAsset asset = (IAsset) value;

                // Get the URL of the asset and insert that.
                attribute = asset.buildURL(cycle);
            }
            else
                attribute = value.toString();

            writer.attribute(name, attribute);
        }

    }

    public void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
    {
        String strElement = m_objElementBinding.getObject().toString();

        writer.begin(strElement);
        generateParentAttributes(writer, cycle);
        renderInformalParameters(writer, cycle);

        renderBody(writer, cycle);

        writer.end();
    }

}
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