de.hybris.platform.acceleratorservices.util.HtmlElementHelper.java Source code

Introduction

Here is the source code for de.hybris.platform.acceleratorservices.util.HtmlElementHelper.java

Source

/*
 * [y] hybris Platform
 *
 * Copyright (c) 2000-2014 hybris AG
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of hybris
 * ("Confidential Information"). You shall not disclose such Confidential
 * Information and shall use it only in accordance with the terms of the
 * license agreement you entered into with hybris.
 *
 *  
 */
package de.hybris.platform.acceleratorservices.util;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import static com.google.common.base.Preconditions.checkArgument;
import static de.hybris.platform.servicelayer.util.ServicesUtil.validateParameterNotNull;

public class HtmlElementHelper {
    private static final Logger LOG = Logger.getLogger(HtmlElementHelper.class);

    public void writeOpenElement(final PageContext pageContext, final String elementName,
            final Map<String, String> attributes) {
        validateParameterNotNull(pageContext, "Parameter pageContext must not be null");
        validateParameterNotNull(elementName, "Parameter elementName must not be null");
        checkArgument(StringUtils.isNotBlank(elementName), "Parameter elementName must not be blank");

        final JspWriter out = pageContext.getOut();

        try {
            out.write("<" + elementName);
            if (attributes != null && !attributes.isEmpty()) {
                for (final Map.Entry<String, String> entry : attributes.entrySet()) {
                    // TODO: Correct escaping
                    out.write(" " + entry.getKey() + "=\"" + entry.getValue() + "\"");
                }
            }
            out.write(">");
            out.write("\n");
        } catch (final IOException e) {
            LOG.warn("Could not write open element: " + e.getMessage());
        }
    }

    public void writeEndElement(final PageContext pageContext, final String elementName) {
        validateParameterNotNull(pageContext, "Parameter pageContext must not be null");
        validateParameterNotNull(elementName, "Parameter elementName must not be null");
        checkArgument(StringUtils.isNotBlank(elementName), "Parameter elementName must not be blank");

        final JspWriter out = pageContext.getOut();

        try {
            out.write("</" + elementName + ">");
        } catch (final IOException e) {
            LOG.warn("Could not write end element: " + e.getMessage());
        }
    }

    public Map<String, String> mergeAttributeMaps(final Map<String, String>... maps) {
        final Map<String, String> result = new HashMap<>();

        if (maps != null && maps.length > 0) {
            for (final Map<String, String> map : maps) {
                if (map != null) {
                    for (final Map.Entry<String, String> entry : map.entrySet()) {
                        if (!result.containsKey(entry.getKey())) {
                            // Just add it to the string
                            final String valueString = entry.getValue();
                            if (valueString != null) {
                                result.put(entry.getKey(), valueString);
                            }
                        } else {
                            final String valueString = mergeAttributeValue(entry.getKey(),
                                    result.get(entry.getKey()), entry.getValue());
                            if (valueString == null) {
                                result.remove(entry.getKey());
                            } else {
                                result.put(entry.getKey(), valueString);
                            }
                        }
                    }
                }
            }
        }

        return result;
    }

    protected String mergeAttributeValue(final String key, final String currentValue, final String newValue) {
        if ("class".equals(key)) {
            return currentValue + " " + newValue;
        }
        return newValue;
    }
}