DOI Utils

src/main/java/org/genesys2/util/DOIUtils.java

+/*
+ * Copyright 2017 Global Crop Diversity Trust
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.genesys2.util;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class DOIUtils {
+	// 10. digit+ / not-whitespace+
+	public static final Pattern DOI_PATTERN = Pattern.compile("^(10\\.[0-9]+)/(\\S+)$");
+
+	public static boolean isValidDoi(String doi) {
+		return DOI_PATTERN.matcher(doi).matches();
+	}
+
+	public static DOI parseDOI(String doi) throws InvalidDOIException {
+		Matcher matcher = DOI_PATTERN.matcher(doi);
+		if (matcher.find()) {
+			return new DOI(matcher.group(1), matcher.group(2));
+		} else {
+			throw new InvalidDOIException(doi);
+		}
+	}
+
+	/**
+	 * Test if string is a DOI.
+	 * 
+	 * @param doi
+	 * @throws InvalidDOIException
+	 */
+	public static void validateDoi(String doi) throws InvalidDOIException {
+		if (!DOI_PATTERN.matcher(doi).matches()) {
+			throw new InvalidDOIException(doi);
+		}
+	}
+
+	public static class DOI {
+		private String prefix;
+		private String id;
+
+		public DOI(String prefix, String id) {
+			this.prefix = prefix;
+			this.id = id;
+		}
+		
+		public String getPrefix() {
+			return prefix;
+		}
+		
+		public String getId() {
+			return id;
+		}
+
+		public String toString() {
+			return "doi:" + prefix + "/" + id;
+		};
+	}
+}

src/main/java/org/genesys2/util/InvalidDOIException.java

+/*
+ * Copyright 2017 Global Crop Diversity Trust
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.genesys2.util;
+
+public class InvalidDOIException extends Exception {
+
+	private static final long serialVersionUID = 5335103695130893198L;
+
+	private String candidateDoi;
+
+	public InvalidDOIException(String doi) {
+		super("The DOI is not valid: " + doi);
+		this.candidateDoi = doi;
+	}
+
+	public String getCandidateDoi() {
+		return candidateDoi;
+	}
+
+}

src/test/java/org/genesys2/util/DOITest.java

+/*
+ * Copyright 2017 Global Crop Diversity Trust
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.genesys2.util;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.genesys2.util.DOIUtils.DOI;
+import org.junit.Test;
+
+public class DOITest {
+
+	@Test
+	public void properDoiTest() throws InvalidDOIException {
+		DOIUtils.validateDoi("10.01032/rmh0000008");
+		DOIUtils.validateDoi("10.04105/XXJPH.2009.160184");
+		DOIUtils.validateDoi("10.0305/XXJPH/2009-160184-2");
+		DOIUtils.validateDoi("10.1/A");
+		DOIUtils.validateDoi("10.18730/AB1R6");
+		DOIUtils.validateDoi("10.0155/AB1R6");
+	}
+	
+
+	@Test(expected = InvalidDOIException.class)
+	public void withWhitespace() throws InvalidDOIException {
+		DOIUtils.validateDoi(" 10.0155/AB1R6");
+	}
+
+	@Test(expected = InvalidDOIException.class)
+	public void withWhitespace2() throws InvalidDOIException {
+		DOIUtils.validateDoi("10.0155/AB1R6 ");
+	}
+	
+	@Test(expected = InvalidDOIException.class)
+	public void no10Dot() throws InvalidDOIException {
+		DOIUtils.validateDoi("2.18730/A");
+	}
+	
+	@Test(expected = InvalidDOIException.class)
+	public void noSlashTest() throws InvalidDOIException {
+		DOIUtils.validateDoi("10.18730");
+	}
+
+	@Test(expected = InvalidDOIException.class)
+	public void noIdTest() throws InvalidDOIException {
+		DOIUtils.validateDoi("10.18730/");
+	}
+	
+	@Test
+	public void parseDoi() throws InvalidDOIException {
+		DOI doi = DOIUtils.parseDOI("10.18730/AB1R6");
+		assertThat(doi.getPrefix(), is("10.18730"));
+		assertThat(doi.getId(), is("AB1R6"));
+		assertThat(doi.toString(), is("doi:10.18730/AB1R6"));
+	}
+}