Example usage for org.apache.wicket.request.resource PackageResource getResourceStream

Introduction

In this page you can find the example usage for org.apache.wicket.request.resource PackageResource getResourceStream.

Prototype

@Override
public IResourceStream getResourceStream() 

Source Link

Document

locate resource stream for current resource

Usage

From source file:org.hippoecm.frontend.skin.IconUtil.java

License:Apache License

public static String svgAsString(PackageResourceReference reference, String... cssClasses)
        throws ResourceStreamNotFoundException, IOException {
    final PackageResource resource = reference.getResource();
    final IResourceStream resourceStream = resource.getResourceStream();
    if (resourceStream == null) {
        throw new ResourceStreamNotFoundException("Cannot find SVG icon " + resource);
    }/*from   w ww. ja  v a 2 s  . c  o m*/
    String svgAsString = IOUtils.toString(resourceStream.getInputStream());

    int rootIndex = svgAsString.indexOf("<svg");
    if (rootIndex == -1) {
        throw new IllegalArgumentException("Cannot find SVG root element in " + resource);
    }

    //skip everything (comments, xml declaration and dtd definition) before <svg element
    svgAsString = svgAsString.substring(rootIndex);

    //append css classes if present
    final String cssClassesAsString = cssClassesAsString(cssClasses);
    if (StringUtils.isNotEmpty(cssClassesAsString)) {
        //check if class attribute is present and part of <svg element
        final int classAttributeIndex = svgAsString.indexOf("class=\"");
        if (classAttributeIndex > -1 && classAttributeIndex < svgAsString.indexOf(">")) {
            int insertCssClassesAt = classAttributeIndex + 7;
            svgAsString = svgAsString.substring(0, insertCssClassesAt) + cssClassesAsString + " "
                    + svgAsString.substring(insertCssClassesAt);
        } else {
            svgAsString = "<svg class=\"" + cssClassesAsString + "\"" + svgAsString.substring(4);
        }
    }

    return svgAsString;
}

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