com.asual.summer.core.faces.RepeatComponentRenderer.java Source code

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Here is the source code for com.asual.summer.core.faces.RepeatComponentRenderer.java

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/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.asual.summer.core.faces;

import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;

import org.apache.commons.lang.StringUtils;

import com.asual.summer.core.util.ObjectUtils;

/**
 * 
 * @author Rostislav Hristov
 *
 */
public class RepeatComponentRenderer extends Renderer {

    public void encodeBegin(FacesContext context, UIComponent component) throws IOException {

        String componentTag = ComponentUtils.getComponentTag(component);
        RepeatComponent repeatComponent = ((RepeatComponent) component);
        ResponseWriter writer = context.getResponseWriter();

        if (componentTag != null) {

            writer.startElement(componentTag, component);

            Map<String, Object> attrs;

            if (ComponentUtils.getComponentClass((Component) component) == null) {
                attrs = ComponentUtils.getAttributes((Component) component, componentTag);
            } else {
                attrs = new HashMap<String, Object>();
            }

            List<String> classes = ComponentUtils.getComponentClasses((Component) component);
            if (classes.size() != 0) {
                attrs.put("class", StringUtils.join(classes, " "));
            }

            for (String key : attrs.keySet()) {
                if (ComponentUtils.shouldWriteAttribute((Component) component, key) && attrs.get(key) != null) {
                    ComponentUtils.writeAttribute(writer, key, attrs.get(key));
                }
            }

            Object value = repeatComponent.getValue();
            if ((value == null || ObjectUtils.size(value) == 0) && repeatComponent.getDataEmpty() != null) {
                if (componentTag.matches("tbody")) {
                    writer.startElement("tr", repeatComponent);
                }
                if (componentTag.matches("tbody|tr")) {
                    writer.startElement("td", repeatComponent);
                }
                writer.write(repeatComponent.getDataEmpty());
                if (componentTag.matches("tbody|tr")) {
                    writer.endElement("td");
                }
                if (componentTag.matches("tbody")) {
                    writer.endElement("tr");
                }
            }
        }

        if (!StringUtils.isEmpty(repeatComponent.getDataEmptyOption())) {
            writer.startElement("option", repeatComponent);
            writer.writeAttribute("value", "", null);
            writer.write(repeatComponent.getDataEmptyOption());
            writer.endElement("option");
        }
    }

    public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
        if (component.getChildCount() > 0) {
            Iterator<?> itr = component.getChildren().iterator();
            while (itr.hasNext()) {
                ((UIComponent) itr.next()).encodeAll(context);
            }
        }
    }

    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        String componentTag = ComponentUtils.getComponentTag(component);
        if (componentTag != null) {
            ResponseWriter writer = context.getResponseWriter();
            writer.endElement(componentTag);
        }
    }

    public boolean getRendersChildren() {
        return true;
    }

}