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feat: sample TIFF validation, with added TAG check
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‎code-samples-tiff/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>code-samples-tiff</artifactId>
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<parent>
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<groupId>org.fugerit.java</groupId>
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<artifactId>code-samples</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<name>Fugerit Code Samples TIFF</name>
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<description>My code samples.</description>
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<licenses>
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<license>
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<name>Apache License, Version 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
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<distribution>repo</distribution>
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</license>
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</licenses>
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<properties>
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<imageio-tiff-version>3.10.1</imageio-tiff-version>
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</properties>
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<scm>
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<connection>scm:git:git://github.com/fugerit-org/code-samples.git</connection>
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<developerConnection>scm:git:ssh://github.com/fugerit-org/code-samples.git</developerConnection>
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<url>https://github.com/fugerit-org/code-samples.git</url>
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<tag>HEAD</tag>
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</scm>
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<dependencies>
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<dependency>
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<groupId>com.twelvemonkeys.imageio</groupId>
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<artifactId>imageio-tiff</artifactId>
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<version>${imageio-tiff-version}</version>
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</dependency>
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</dependencies>
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<organization>
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<url>https://www.fugerit.org</url>
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<name>Fugerit</name>
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</organization>
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<url>https://www.fugerit.org/</url>
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</project>

‎code-samples-tiff/src/main/java/org/fugerit/java/code/samples/tiff/TiffMetadataValidator.java‎

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package org.fugerit.java.code.samples.tiff;
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import com.twelvemonkeys.imageio.metadata.tiff.TIFFEntry;
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import com.twelvemonkeys.imageio.plugins.tiff.TIFFImageMetadata;
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import lombok.extern.slf4j.Slf4j;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageReader;
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import javax.imageio.metadata.IIOMetadata;
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import javax.imageio.stream.ImageInputStream;
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import java.io.File;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.List;
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import org.w3c.dom.Node;
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import org.w3c.dom.NamedNodeMap;
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@Slf4j
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public class TiffMetadataValidator {
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public static boolean validateTiffAndMetadata(File file, int... idTags) {
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ImageReader reader = null;
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try (ImageInputStream iis = ImageIO.createImageInputStream(file)) {
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Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);
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if (!readers.hasNext()) {
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log.warn("No ImageReader available for {}", file);
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return Boolean.TRUE;
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}
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reader = readers.next();
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reader.setInput(iis, true);
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IIOMetadata meta = reader.getImageMetadata(0);
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// TIFF plugin metadata format name
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String[] formatNames = meta.getMetadataFormatNames();
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for (String format : formatNames) {
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log.info("Metadata format: {}", format);
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Node root = meta.getAsTree(format);
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dumpNode(root, 0);
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}
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if (meta instanceof TIFFImageMetadata) {
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for ( int idTag : idTags ) {
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TIFFImageMetadata tiffMeta = (TIFFImageMetadata) meta;
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TIFFEntry entry = (TIFFEntry) tiffMeta.getTIFFField(idTag);
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if (entry == null) {
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return Boolean.FALSE;
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}
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}
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} else {
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return Boolean.FALSE;
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}
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return Boolean.TRUE;
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} catch (Exception e) {
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log.error("Error reading TIFF metadata from {}: {}", file, e.getMessage(), e);
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return Boolean.FALSE;
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} finally {
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if (reader != null) {
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reader.dispose();
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}
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}
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}
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private static void dumpNode(Node node, int level) {
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < level; i++) {
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sb.append(" ");
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}
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String indent = sb.toString();
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log.info("{}Node: {}", indent, node.getNodeName());
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NamedNodeMap attributes = node.getAttributes();
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if (attributes != null) {
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for (int i = 0; i < attributes.getLength(); i++) {
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Node attr = attributes.item(i);
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log.info("{} @{} = {}", indent, attr.getNodeName(), attr.getNodeValue());
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}
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}
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Node child = node.getFirstChild();
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while (child != null) {
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dumpNode(child, level + 1);
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child = child.getNextSibling();
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}
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}
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}

‎code-samples-tiff/src/main/java/org/fugerit/java/code/samples/tiff/TiffValidator.java‎

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package org.fugerit.java.code.samples.tiff;
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import lombok.extern.slf4j.Slf4j;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageReader;
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import javax.imageio.stream.ImageInputStream;
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import java.io.File;
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import java.util.Iterator;
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@Slf4j
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public class TiffValidator {
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private TiffValidator() {}
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public static boolean isValidTiff(File file) {
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try (ImageInputStream iis = ImageIO.createImageInputStream(file)) {
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if (iis == null) {
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return false;
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}
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Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);
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if (!readers.hasNext()) {
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return false; // no reader for this format
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}
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ImageReader reader = readers.next();
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reader.setInput(iis, true);
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reader.read(0); // try reading first page/frame
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reader.dispose();
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return Boolean.TRUE;
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} catch (Exception e) {
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log.error( e.getMessage(), e );
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return Boolean.FALSE;
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}
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}
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}

‎code-samples-tiff/src/test/java/org/fugerit/java/code/samples/tiff/TiffMetadataValidatorTest.java‎

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package org.fugerit.java.code.samples.tiff;
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import com.twelvemonkeys.imageio.metadata.exif.TIFF;
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import lombok.extern.slf4j.Slf4j;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import java.io.File;
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@Slf4j
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public class TiffMetadataValidatorTest {
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@Test
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void testValidTiffNotValid() {
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File sampleFile = new File("src/test/resources/sample/sample.tiff");
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boolean res = TiffMetadataValidator.validateTiffAndMetadata( sampleFile, TIFF.TAG_X_RESOLUTION );
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Assertions.assertFalse(res);
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}
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@Test
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void testValidTiffValid() {
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File sampleFile = new File("src/test/resources/sample/file_example_TIFF_1MB.tiff");
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boolean res = TiffMetadataValidator.validateTiffAndMetadata( sampleFile, TIFF.TAG_X_RESOLUTION );
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Assertions.assertTrue(res);
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}
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}

‎code-samples-tiff/src/test/java/org/fugerit/java/code/samples/tiff/TiffValidatorTest.java‎

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package org.fugerit.java.code.samples.tiff;
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import lombok.extern.slf4j.Slf4j;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import java.io.File;
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@Slf4j
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class TiffValidatorTest {
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@Test
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void testValidTiff() {
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File sampleFile = new File("src/test/resources/sample/sample.tiff");
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boolean valid = TiffValidator.isValidTiff( sampleFile );
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log.info( "validation result : {} -> {}", valid, sampleFile.getAbsolutePath() );
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Assertions.assertTrue(valid);
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}
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}

‎code-samples-tiff/src/test/resources/sample/file_example_TIFF_1MB.tiff‎

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‎code-samples-tiff/src/test/resources/sample/sample.tiff‎

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‎pom.xml‎

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<module>code-samples-openpdf</module>
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<module>code-samples-itext2</module>
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<module>code-samples-fop</module>
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<module>code-samples-tiff</module>
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</modules>
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<scm>

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