DATAREST-78. Remove leading slash in @query path.

spring-data-rest-repository/src/main/java/org/springframework/data/rest/repository/support/ResourceMappingUtils.java

@@ -1,8 +1,5 @@
 package org.springframework.data.rest.repository.support;
 
-import static org.springframework.core.annotation.AnnotationUtils.*;
-import static org.springframework.util.StringUtils.*;
-
 import java.lang.reflect.Method;
 
 import org.springframework.data.mapping.PersistentEntity;
@@ -12,6 +9,11 @@
 import org.springframework.data.rest.config.ResourceMapping;
 import org.springframework.data.rest.repository.annotation.RestResource;
 
+import static org.springframework.core.annotation.AnnotationUtils.findAnnotation;
+import static org.springframework.data.rest.repository.support.ResourceStringUtils.hasText;
+import static org.springframework.data.rest.repository.support.ResourceStringUtils.removeLeadingSlash;
+import static org.springframework.util.StringUtils.uncapitalize;
+
 /**
  * Helper methods to get the default rel and path values or to use values supplied by annotations.
  *
@@ -56,16 +58,16 @@ public static String formatRel(RepositoryRestConfiguration config,
  ResourceMapping propertyMapping = entityMapping.getResourceMappingFor(persistentProperty.getName());
 
  return String.format("%s.%s.%s",
-  repoMapping.getRel(),
-  entityMapping.getRel(),
-  (null != propertyMapping ? propertyMapping.getRel() : persistentProperty.getName()));
+ repoMapping.getRel(),
+ entityMapping.getRel(),
+ (null != propertyMapping ? propertyMapping.getRel() : persistentProperty.getName()));
  }
 
  public static String findPath(Class<?> type) {
  RestResource anno;
  if(null != (anno = findAnnotation(type, RestResource.class))) {
  if(hasText(anno.path())) {
- return anno.path();
+ return removeLeadingSlash(anno.path());
  }
  }
 
@@ -76,7 +78,7 @@ public static String findPath(Method method) {
  RestResource anno;
  if(null != (anno = findAnnotation(method, RestResource.class))) {
  if(hasText(anno.path())) {
- return anno.path();
+ return removeLeadingSlash(anno.path());
  }
  }
 

spring-data-rest-repository/src/main/java/org/springframework/data/rest/repository/support/ResourceStringUtils.java

@@ -0,0 +1,45 @@
+package org.springframework.data.rest.repository.support;
+
+/**
+ * Helper methods aiming at handling String representations of resources.
+ *
+ * @author Florent Biville
+ */
+public class ResourceStringUtils {
+ /**
+ * Checks whether the given input contains actual text (slash excluded).
+ * This is a specializing variant of {@link org.springframework.util.StringUtils )}#hasText.
+ */
+ public static boolean hasText(CharSequence input) {
+ int strLen = input.length();
+for (int i = 0; i < strLen; i++) {
+if (!Character.isWhitespace(input.charAt(i)) && !startsWithSlash(input.charAt(i))) {
+return true;
+}
+}
+return false;
+ }
+
+ /**
+ * Returns a string without the leading slash, if any.
+ */
+ public static String removeLeadingSlash(String path) {
+ if (path.length() == 0) {
+ return path;
+ }
+
+ boolean hasLeadingSlash = startsWithSlash(path);
+ if (path.length() == 1) {
+ return hasLeadingSlash ? "" : path;
+ }
+ return hasLeadingSlash ? path.substring(1) : path;
+ }
+
+ private static boolean startsWithSlash(String path) {
+ return path.charAt(0) == '/';
+ }
+
+ private static boolean startsWithSlash(char c) {
+ return c == '/';
+ }
+}

spring-data-rest-repository/src/test/java/org/springframework/data/rest/config/ResourceMappingUnitTests.java

@@ -9,6 +9,7 @@
 import org.junit.Test;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.rest.repository.domain.jpa.AnnotatedPersonRepository;
+import org.springframework.data.rest.repository.domain.jpa.AnnotatedWithLeadingSlashPersonRepository;
 import org.springframework.data.rest.repository.domain.jpa.PersonRepository;
 import org.springframework.data.rest.repository.domain.jpa.PlainPersonRepository;
 
@@ -60,4 +61,52 @@ public void shouldDetectAnnotatedRelAndPathOnMethod() throws Exception {
  assertThat(mapping.isExported(), is(true));
  }
 
+ @Test
+ public void shouldDetectPathAndRemoveLeadingSlashIfAny() {
+ ResourceMapping mapping = new ResourceMapping(
+ findRel(AnnotatedWithLeadingSlashPersonRepository.class),
+ findPath(AnnotatedWithLeadingSlashPersonRepository.class),
+ findExported(AnnotatedWithLeadingSlashPersonRepository.class)
+ );
+
+ // The rel attribute defaults to class name
+ assertThat(mapping.getRel(), is("annotatedWithLeadingSlashPerson"));
+ assertThat(mapping.getPath(), is("people"));
+ // The exported defaults to true
+ assertThat(mapping.isExported(), is(true));
+ }
+
+ @Test
+ public void shouldDetectPathAndRemoveLeadingSlashIfAnyOnMethod() throws Exception {
+ Method method = AnnotatedWithLeadingSlashPersonRepository.class.getMethod("findByFirstName", String.class, Pageable.class);
+ ResourceMapping mapping = new ResourceMapping(
+ findRel(method),
+ findPath(method),
+ findExported(method)
+ );
+
+ // The rel attribute defaults to class name
+ assertThat(mapping.getRel(), is("findByFirstName"));
+ assertThat(mapping.getPath(), is("firstname"));
+ // The exported defaults to true
+ assertThat(mapping.isExported(), is(true));
+ }
+
+ @Test
+ public void shouldReturnDefaultIfPathContainsOnlySlashTextOnMethod() throws Exception {
+ Method method = AnnotatedWithLeadingSlashPersonRepository.class.getMethod("findByLastName", String.class, Pageable.class);
+ ResourceMapping mapping = new ResourceMapping(
+ findRel(method),
+ findPath(method),
+ findExported(method)
+ );
+
+ // The rel defaults to method name
+ assertThat(mapping.getRel(), is("findByLastName"));
+ // The path contains only a leading slash therefore defaults to method name
+ assertThat(mapping.getPath(), is("findByLastName"));
+ // The exported defaults to true
+ assertThat(mapping.isExported(), is(true));
+ }
+
 }

spring-data-rest-repository/src/test/java/org/springframework/data/rest/repository/domain/jpa/AnnotatedWithLeadingSlashPersonRepository.java

@@ -0,0 +1,21 @@
+package org.springframework.data.rest.repository.domain.jpa;
+
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.repository.query.Param;
+import org.springframework.data.rest.repository.annotation.RestResource;
+
+/**
+ * A repository to manage {@link org.springframework.data.rest.repository.domain.jpa.Person}s.
+ *
+ * @author Florent Biville
+ */
+@RestResource(path = "/people")
+public interface AnnotatedWithLeadingSlashPersonRepository {
+
+ @RestResource(path = "/firstname")
+ public Page<Person> findByFirstName(@Param("firstName") String firstName, Pageable pageable);
+
+ @RestResource(path = " / ")
+ public Page<Person> findByLastName(@Param("lastName") String firstName, Pageable pageable);
+}

spring-data-rest-repository/src/test/java/org/springframework/data/rest/repository/support/ResourceStringUtilsTest.java

@@ -0,0 +1,57 @@
+package org.springframework.data.rest.repository.support;
+
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.junit.runners.Parameterized.Parameters;
+
+/**
+ * Ensures proper detection and removal of leading slash in strings.
+ *
+ * @author Florent Biville
+ */
+@RunWith(Parameterized.class)
+public class ResourceStringUtilsTest {
+
+ private String actual;
+ private String expected;
+ private boolean hasText;
+
+ public ResourceStringUtilsTest(String testDescription,
+ String actual,
+ String expected,
+ boolean hasText) {
+ this.actual = actual;
+ this.expected = expected;
+ this.hasText = hasText;
+ }
+
+ @Parameters(name = "{0}")
+ public static Collection<?> parameters() {
+ return Arrays.asList(new Object[][] {
+ {"empty string has no text and should remain empty", "", "", false},
+ {"blank string has no text and should remain as is", " ", " ", false},
+ {"string made of only a leading slash has no text and should be returned empty", "/", "", false},
+ {"blank string with only slashes has no text and should be returned as is", " / ", " / ", false},
+ {"normal string has text and should be returned as such", "hello", "hello", true},
+ {"normal string with leading slash has text and should be returned without leading slash", "/hello", "hello", true},
+ });
+ }
+
+ @Test
+ public void shouldDetectTextPresence() {
+ assertThat(ResourceStringUtils.hasText(actual), is(hasText));
+ }
+
+ @Test
+ public void shouldRemoveLeadingSlashIfAny() {
+ assertThat(ResourceStringUtils.removeLeadingSlash(actual), is(expected));
+ }
+}