Example usage for com.liferay.portal.kernel.diff DiffUtil diff

Introduction

In this page you can find the example usage for com.liferay.portal.kernel.diff DiffUtil diff.

Prototype

public static List<DiffResult>[] diff(Reader source, Reader target) 

Source Link

Document

This is a diff method with default values.

Usage

From source file:com.liferay.document.library.web.internal.portlet.action.CompareVersionsMVCRenderCommand.java

License:Open Source License

protected void compareVersions(RenderRequest renderRequest) throws Exception {

    long sourceFileVersionId = ParamUtil.getLong(renderRequest, "sourceFileVersionId");
    long targetFileVersionId = ParamUtil.getLong(renderRequest, "targetFileVersionId");

    FileVersion sourceFileVersion = _dlAppService.getFileVersion(sourceFileVersionId);

    InputStream sourceIs = sourceFileVersion.getContentStream(false);

    String sourceExtension = sourceFileVersion.getExtension();

    if (sourceExtension.equals("css") || sourceExtension.equals("htm") || sourceExtension.equals("html")
            || sourceExtension.equals("js") || sourceExtension.equals("txt") || sourceExtension.equals("xml")) {

        String sourceContent = HtmlUtil.escape(StringUtil.read(sourceIs));

        sourceIs = new UnsyncByteArrayInputStream(sourceContent.getBytes(StringPool.UTF8));
    }//from   w  w w  .java 2s.  c o  m

    FileVersion targetFileVersion = _dlAppLocalService.getFileVersion(targetFileVersionId);

    InputStream targetIs = targetFileVersion.getContentStream(false);

    String targetExtension = targetFileVersion.getExtension();

    if (targetExtension.equals("css") || targetExtension.equals("htm") || targetExtension.equals("html")
            || targetExtension.equals("js") || targetExtension.equals("txt") || targetExtension.equals("xml")) {

        String targetContent = HtmlUtil.escape(StringUtil.read(targetIs));

        targetIs = new UnsyncByteArrayInputStream(targetContent.getBytes(StringPool.UTF8));
    }

    if (DocumentConversionUtil.isEnabled()) {
        if (DocumentConversionUtil.isConvertBeforeCompare(sourceExtension)) {

            String sourceTempFileId = DLUtil.getTempFileId(sourceFileVersion.getFileEntryId(),
                    sourceFileVersion.getVersion());

            sourceIs = new FileInputStream(
                    DocumentConversionUtil.convert(sourceTempFileId, sourceIs, sourceExtension, "txt"));
        }

        if (DocumentConversionUtil.isConvertBeforeCompare(targetExtension)) {

            String targetTempFileId = DLUtil.getTempFileId(targetFileVersion.getFileEntryId(),
                    targetFileVersion.getVersion());

            targetIs = new FileInputStream(
                    DocumentConversionUtil.convert(targetTempFileId, targetIs, targetExtension, "txt"));
        }
    }

    List<DiffResult>[] diffResults = DiffUtil.diff(new InputStreamReader(sourceIs),
            new InputStreamReader(targetIs));

    renderRequest.setAttribute(WebKeys.DIFF_RESULTS, diffResults);

    renderRequest.setAttribute(WebKeys.SOURCE_NAME,
            sourceFileVersion.getTitle() + StringPool.SPACE + sourceFileVersion.getVersion());
    renderRequest.setAttribute(WebKeys.TARGET_NAME,
            targetFileVersion.getTitle() + StringPool.SPACE + targetFileVersion.getVersion());
}

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