LspfResource的支持

支持LspfResource

LspfResource包含有关层保护设置的设置。Aspose.PSD支持PSD文件中的LspfResource。为此，API提供了LspfResource类。

以下代码段显示了Aspose.PSD如何支持LspfResource。

    // For complete examples and data files, please go to https://github.com/aspose-psd/Aspose.PSD-for-Java
    public static void main(String[] args) {
        String sourceDir = Utils.GetDataDir_PSD();
        String outputDir = Utils.GetDataDir_Output();
        final String actualPropertyValueIsWrongMessage = "Expected property value is not equal to actual value";

        String sourceFileName = sourceDir + "SampleForLspfResource.psd";
        String destinationFileName = outputDir + "SampleForLspfResource_out.psd";
        boolean isRequiredResourceFound = false;
        PsdImage im = null;
        try {
            im = (PsdImage) Image.load(sourceFileName);
            for (Layer layer : im.getLayers()) {
                for (LayerResource layerResource : layer.getResources()) {
                    if (layerResource instanceof LspfResource) {
                        LspfResource resource = (LspfResource) layerResource;

                        isRequiredResourceFound = true;

                        assertIsTrue(!resource.isCompositeProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(!resource.isPositionProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(!resource.isTransparencyProtected(), actualPropertyValueIsWrongMessage);

                        // Test editing and saving
                        resource.setCompositeProtected(true);
                        assertIsTrue(resource.isCompositeProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(!resource.isPositionProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(!resource.isTransparencyProtected(), actualPropertyValueIsWrongMessage);

                        resource.setCompositeProtected(false);
                        resource.setPositionProtected(true);
                        assertIsTrue(!resource.isCompositeProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(resource.isPositionProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(!resource.isTransparencyProtected(), actualPropertyValueIsWrongMessage);

                        resource.setPositionProtected(false);
                        resource.setTransparencyProtected(true);
                        assertIsTrue(!resource.isCompositeProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(!resource.isPositionProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(resource.isTransparencyProtected(), actualPropertyValueIsWrongMessage);

                        resource.setCompositeProtected(true);
                        resource.setPositionProtected(true);
                        resource.setTransparencyProtected(true);

                        im.save(destinationFileName);
                        break;
                    }
                }
            }
        } finally {
            if (im != null) im.dispose();
        }

        assertIsTrue(isRequiredResourceFound, "The specified LspfResource not found");
        isRequiredResourceFound = false;

        PsdImage im2 = null;
        try {
            im2 = (PsdImage) Image.load(destinationFileName);
            for (Layer layer : im2.getLayers()) {
                for (LayerResource layerResource : layer.getResources()) {
                    if (layerResource instanceof LspfResource) {
                        LspfResource resource = (LspfResource) layerResource;

                        isRequiredResourceFound = true;

                        assertIsTrue(resource.isCompositeProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(resource.isPositionProtected(), actualPropertyValueIsWrongMessage);
                        assertIsTrue(resource.isTransparencyProtected(), actualPropertyValueIsWrongMessage);

                        break;
                    }
                }
            }
        } finally {
            if (im2 != null) im2.dispose();
        }

        assertIsTrue(isRequiredResourceFound, "The specified LspfResource not found");
        System.out.println("LspfResource updating works as expected. Press any key.");
    }

    private static void assertIsTrue(boolean condition, String message) {
        if (!condition) {
            throw new FormatException(message);
        }
    }