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The Adobe Experience Manager SDK

There is a newer version: 2024.11.18751.20241128T090041Z-241100

/*
 * ADOBE CONFIDENTIAL
 * __________________
 *
 *  Copyright 2016 Adobe
 *  All Rights Reserved.
 *
 * NOTICE: All information contained herein is, and remains
 * the property of Adobe and its suppliers, if any. The intellectual
 * and technical concepts contained herein are proprietary to Adobe
 * and its suppliers and are protected by all applicable intellectual
 * property laws, including trade secret and copyright laws.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Adobe.
 */

package com.adobe.granite.contexthub.commons;

import org.apache.commons.lang3.StringUtils;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceUtil;
import org.apache.sling.api.resource.ValueMap;

import static org.apache.jackrabbit.JcrConstants.JCR_CONTENT;

public class Utils {

    private static final String PN_PREFIX = "./" + JCR_CONTENT;
    /**
     * Returns the content property of the given page. If the resource does not
     * contain this property, the parent resource is checked against given property
     * or null if resource has no parent.
     *
     * @param resource - resource
     * @param property - property name
     * @return the property value or null
     */
    public static String getInheritedProperty(Resource resource, String property) {
        String previousPath = null;
        String value = null;
        String localProperty = property;

        //If the property has the form "./jcr:content/propertyName". It removes the "jcr:content" prefix
        //leaving the property name as ./propertyName. This is needed because the algorithm below
        //always checks for the property on the jcr:content node.
        if (StringUtils.startsWith(localProperty, PN_PREFIX)) {
            localProperty = "." + localProperty.substring(PN_PREFIX.length());
        }

        while ((value == null) && (resource != null)) {
            Resource here = resource;

            /* get "jcr:content" child if needed */
            if (!JCR_CONTENT.equals(here.getName())) {
                here = here.getChild(JCR_CONTENT);
            }

            /* is resource found? */
            if (here != null) {
                String currentPath = here.getPath();

                if (!currentPath.equals(previousPath)) {
                    ValueMap properties = ResourceUtil.getValueMap(here);

                    previousPath = currentPath;
                    value = properties.get(localProperty, String.class);

                    /* check parent if value is empty */
                    if ((value != null) && (value.length() == 0)) {
                        value = null;
                    }
                }
            }

            /* get parent */
            resource = resource.getParent();
        }

        return value;
    }
}