Case insensitive like operator

querydsl · Nov 13, 2015 · 96698c2 · 96698c2
1 parent 983aab4
commit 96698c2
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Showing 21 changed files with 202 additions and 54 deletions.
diff --git a/querydsl-collections/src/main/java/com/mysema/query/collections/CollQueryFunctions.java b/querydsl-collections/src/main/java/com/mysema/query/collections/CollQueryFunctions.java
@@ -17,6 +17,7 @@
 import java.lang.reflect.Field;
 import java.math.BigDecimal;
 import java.util.*;
+import java.util.regex.Pattern;
 
 import com.google.common.base.Objects;
 import com.mysema.query.types.Expression;
@@ -252,6 +253,33 @@ public static boolean like(String str, String like, char escape) {
         return like(str, like);
     }
 
+    public static boolean likeIgnoreCase(String str, String like) {
+        final StringBuilder pattern = new StringBuilder(like.length() + 4);
+        for (int i = 0; i < like.length(); i++) {
+            final char ch = like.charAt(i);
+            if (ch == '%') {
+                pattern.append(".*");
+                continue;
+            } else if (ch == '_') {
+                pattern.append('.');
+                continue;
+            } else if (ch == '.' || ch == '$' || ch == '^') {
+                pattern.append('\\');
+            }
+            pattern.append(ch);
+        }
+        if (pattern.toString().equals(like)) {
+            return str.equalsIgnoreCase(like);
+        } else {
+            return Pattern.compile(pattern.toString(), Pattern.CASE_INSENSITIVE)
+                    .matcher(str).matches();
+        }
+    }
+
+    public static boolean likeIgnoreCase(String str, String like, char escape) {
+        return likeIgnoreCase(str, like);
+    }
+
     public static <T> T get(Object parent, String f) {
         try {
             Field field = ReflectionUtils.getFieldOrNull(parent.getClass(), f);

diff --git a/querydsl-collections/src/main/java/com/mysema/query/collections/CollQueryTemplates.java b/querydsl-collections/src/main/java/com/mysema/query/collections/CollQueryTemplates.java
@@ -73,7 +73,9 @@ protected CollQueryTemplates() {
 
         // String
         add(Ops.LIKE, functions + ".like({0},{1})");
+        add(Ops.LIKE_IC, functions + ".likeIgnoreCase({0},{1})");
         add(Ops.LIKE_ESCAPE, functions + ".like({0},{1},{2})");
+        add(Ops.LIKE_ESCAPE_IC, functions + ".likeIgnoreCase({0},{1},{2})");
 
         // Path types
         for (PathType type : new PathType[] {

diff --git a/querydsl-core/src/main/java/com/mysema/query/types/ExpressionUtils.java b/querydsl-core/src/main/java/com/mysema/query/types/ExpressionUtils.java
@@ -757,6 +757,23 @@ public static Expression<?> toExpression(Object o) {
         }
     }
 
+    /**
+     * Converts the given expression to lower(expression)
+     *
+     * <p>Constants are lower()ed at creation time</p>
+     *
+     * @param stringExpression the string to lower()
+     * @return lower(stringExpression)
+     */
+    public static Expression<String> toLower(Expression<String> stringExpression) {
+        if (stringExpression instanceof Constant) {
+            Constant<String> constantExpression = (Constant<String>) stringExpression;
+            return ConstantImpl.create(constantExpression.getConstant().toLowerCase(Locale.ENGLISH));
+        } else {
+            return operation(String.class, Ops.LOWER, stringExpression);
+        }
+    }
+
     /**
      * Create an expression out of the given order specifiers
      *

diff --git a/querydsl-core/src/main/java/com/mysema/query/types/JavaTemplates.java b/querydsl-core/src/main/java/com/mysema/query/types/JavaTemplates.java
@@ -61,7 +61,7 @@ public JavaTemplates() {
         add(Ops.TRIM, "{0}.trim()");
         add(Ops.UPPER, "{0}.toUpperCase()");
         add(Ops.MATCHES, "{0}.matches({1})");
-        add(Ops.MATCHES_IC, "{0}.matches({1})");
+        add(Ops.MATCHES_IC, "{0l}.matches({1l})");
         add(Ops.STRING_LENGTH, "{0}.length()");
         add(Ops.STRING_IS_EMPTY, "{0}.isEmpty()");
         add(Ops.STRING_CONTAINS, "{0}.contains({1})");

diff --git a/querydsl-core/src/main/java/com/mysema/query/types/Ops.java b/querydsl-core/src/main/java/com/mysema/query/types/Ops.java
@@ -154,8 +154,12 @@ public final class Ops {
 
     public static final Operator<Boolean> LIKE = new OperatorImpl<Boolean>(NS, "LIKE");
 
+    public static final Operator<Boolean> LIKE_IC = new OperatorImpl<Boolean>(NS, "LIKE_IC");
+
     public static final Operator<Boolean> LIKE_ESCAPE = new OperatorImpl<Boolean>(NS, "LIKE_ESCAPE");
 
+    public static final Operator<Boolean> LIKE_ESCAPE_IC = new OperatorImpl<Boolean>(NS, "LIKE_ESCAPE_IC");
+
     // case
     public static final Operator<Object>  CASE = new OperatorImpl<Object>(NS, "CASE");
 

diff --git a/querydsl-core/src/main/java/com/mysema/query/types/Templates.java b/querydsl-core/src/main/java/com/mysema/query/types/Templates.java
@@ -13,6 +13,7 @@
  */
 package com.mysema.query.types;
 
+import java.util.Arrays;
 import java.util.IdentityHashMap;
 import java.util.Map;
 
@@ -142,7 +143,9 @@ public String escapeForLike(String str) {
         add(Ops.INDEX_OF_2ARGS, "indexOf({0},{1},{2})");
         add(Ops.STRING_IS_EMPTY, "empty({0})");
         add(Ops.LIKE, "{0} like {1}", Precedence.COMPARISON);
+        add(Ops.LIKE_IC, "{0l} like {1l}", Precedence.COMPARISON);
         add(Ops.LIKE_ESCAPE, "{0} like {1} escape '{2s}'", Precedence.COMPARISON);
+        add(Ops.LIKE_ESCAPE_IC, "{0l} like {1l} escape '{2s}'", Precedence.COMPARISON);
 
         add(Ops.StringOps.LEFT, "left({0},{1})");
         add(Ops.StringOps.RIGHT, "right({0},{1})");
@@ -329,8 +332,12 @@ public final int getPrecedence(Operator<?> op) {
         return precedence.get(op).intValue();
     }
 
-    protected void setPrecedence(int p, Operator... ops) {
-        for (Operator op : ops) {
+    protected void setPrecedence(int p, Operator<?>... ops) {
+        setPrecedence(p, Arrays.asList(ops));
+    }
+
+    protected void setPrecedence(int p, Iterable<? extends Operator<?>> ops) {
+        for (Operator<?> op : ops) {
             precedence.put(op, p);
         }
     }

diff --git a/querydsl-core/src/main/java/com/mysema/query/types/expr/StringExpression.java b/querydsl-core/src/main/java/com/mysema/query/types/expr/StringExpression.java
@@ -319,7 +319,27 @@ public BooleanExpression like(String str) {
     public BooleanExpression like(Expression<String> str) {
         return BooleanOperation.create(Ops.LIKE, mixin, str);
     }
-
+
+    /**
+     * Expr: {@code this like str} ignoring case.
+     *
+     * @param str string
+     * @return this like string
+     */
+    public BooleanExpression likeIgnoreCase(String str) {
+        return BooleanOperation.create(Ops.LIKE_IC, mixin, ConstantImpl.create(str));
+    }
+
+    /**
+     * Expr: {@code this like str} ignoring case.
+     *
+     * @param str string
+     * @return this like string
+     */
+    public BooleanExpression likeIgnoreCase(Expression<String> str) {
+        return BooleanOperation.create(Ops.LIKE_IC, mixin, str);
+    }
+
     /**
      * Expr: {@code this like str}
      *
@@ -340,6 +360,28 @@ public BooleanExpression like(Expression<String> str, char escape) {
         return BooleanOperation.create(Ops.LIKE_ESCAPE, mixin, str, ConstantImpl.create(escape));
     }
 
+    /**
+     * Expr: {@code this like str} ignoring case
+     *
+     * @param str string
+     * @param escape escape character
+     * @return this like string
+     */
+    public BooleanExpression likeIgnoreCase(String str, char escape) {
+        return BooleanOperation.create(Ops.LIKE_ESCAPE_IC, mixin, ConstantImpl.create(str), ConstantImpl.create(escape));
+    }
+
+    /**
+     * Expr: {@code this like str} ignoring case
+     *
+     * @param str string
+     * @param escape escape character
+     * @return this like string
+     */
+    public BooleanExpression likeIgnoreCase(Expression<String> str, char escape) {
+        return BooleanOperation.create(Ops.LIKE_ESCAPE_IC, mixin, str, ConstantImpl.create(escape));
+    }
+
     /**
      * Get the position of the given String in this String, the first position is 1
      * 

diff --git a/querydsl-core/src/test/java/com/mysema/query/FilterFactory.java b/querydsl-core/src/test/java/com/mysema/query/FilterFactory.java
@@ -318,6 +318,14 @@ public Collection<Predicate> string(StringExpression expr, StringExpression othe
         rv.add(expr.like("%"+knownValue.substring(1), '!'));
         rv.add(expr.like("%"+knownValue.substring(1,2)+"%", '!'));
 
+        rv.add(expr.likeIgnoreCase(knownValue.substring(0, 1) + "%"));
+        rv.add(expr.likeIgnoreCase("%" + knownValue.substring(1)));
+        rv.add(expr.likeIgnoreCase("%" + knownValue.substring(1, 2) + "%"));
+
+        rv.add(expr.likeIgnoreCase(knownValue.substring(0, 1) + "%", '!'));
+        rv.add(expr.likeIgnoreCase("%" + knownValue.substring(1), '!'));
+        rv.add(expr.likeIgnoreCase("%" + knownValue.substring(1, 2) + "%", '!'));
+
         rv.add(expr.notLike(knownValue.substring(0,1)+"%"));
         rv.add(expr.notLike("%"+knownValue.substring(1)));
         rv.add(expr.notLike("%"+knownValue.substring(1,2)+"%"));

diff --git a/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLSerializer.java b/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLSerializer.java
@@ -279,11 +279,19 @@ protected void visitOperation(Class<?> type, Operator<?> operator, List<? extend
             handle(args.get(0)).append(" instanceof ");
             append(((Constant<Class<?>>) args.get(1)).getConstant().getName());
 
-        } else if (operator == Ops.LIKE || operator == Ops.LIKE_ESCAPE) {
-            super.visitOperation(type, Ops.MATCHES, 
-                ImmutableList.of(args.get(0), ExpressionUtils.likeToRegex((Expression<String>) args.get(1), false)));
-
-        // exists    
+        } else if (operator == Ops.LIKE || operator == Ops.LIKE_ESCAPE || operator == Ops.LIKE_IC || operator == Ops.LIKE_ESCAPE_IC) {
+            @SuppressWarnings("unchecked") //This is the expected type for like
+            Expression<String> string = (Expression<String>) args.get(0);
+            @SuppressWarnings("unchecked") //This is the expected type for like
+            Expression<String> regex = ExpressionUtils.likeToRegex((Expression<String>) args.get(1), false);
+            if (operator == Ops.LIKE_IC || operator == Ops.LIKE_ESCAPE_IC) {
+                string = ExpressionUtils.toLower(string);
+                regex = ExpressionUtils.toLower(regex);
+            }
+            super.visitOperation(type, Ops.MATCHES,
+                ImmutableList.of(string, regex));
+
+        // exists
         } else if (operator == Ops.EXISTS && args.get(0) instanceof SubQueryExpression) {
             final SubQueryExpression subQuery = (SubQueryExpression) args.get(0);
             append("(");

diff --git a/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLTemplates.java b/querydsl-jdo/src/main/java/com/mysema/query/jdo/JDOQLTemplates.java
@@ -34,7 +34,9 @@ protected JDOQLTemplates() {
         add(Ops.EQ_IGNORE_CASE, "{0l}.equals({1l})");
         add(Ops.STRING_IS_EMPTY, "{0} == \"\"", Precedence.EQUALITY);
         add(Ops.LIKE, "{0}.like({1})");
+        add(Ops.LIKE_IC, "{0l}.like({1l})");
         add(Ops.LIKE_ESCAPE, "{0}.like({1})");
+        add(Ops.LIKE_ESCAPE_IC, "{0}.like({1})");
 
         add(Ops.STRING_CAST, "(String){0}");
 

diff --git a/querydsl-jdo/src/test/java/com/mysema/query/jdo/BasicsTest.java b/querydsl-jdo/src/test/java/com/mysema/query/jdo/BasicsTest.java
@@ -13,9 +13,17 @@
  */
 package com.mysema.query.jdo;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+import java.io.IOException;
+
 import javax.jdo.PersistenceManager;
 import javax.jdo.Transaction;
-import java.io.IOException;
+
+import org.junit.BeforeClass;
+import org.junit.Ignore;
+import org.junit.Test;
 
 import com.google.common.collect.ImmutableList;
 import com.mysema.query.BooleanBuilder;
@@ -26,11 +34,6 @@
 import com.mysema.query.jdo.test.domain.QProduct;
 import com.mysema.query.types.Expression;
 import com.mysema.query.types.Projections;
-import org.junit.BeforeClass;
-import org.junit.Ignore;
-import org.junit.Test;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 
 public class BasicsTest extends AbstractJDOTest {
 
@@ -222,6 +225,10 @@ public void Starts_With() {
     @Test
     public void Matches() {
         assertEquals("matches", 1, query(product,product.name.matches("Sony.*")).size());
+        assertEquals(
+                query(product, product.name.matches("Sony.*")).size(),
+                query(product, product.name.likeIgnoreCase("sony%")).size()
+        );
     }
 
     @Test

diff --git a/querydsl-jdo/src/test/java/com/mysema/query/jdo/JDOQLMethodsTest.java b/querydsl-jdo/src/test/java/com/mysema/query/jdo/JDOQLMethodsTest.java
@@ -63,6 +63,7 @@ private <A,K,V> List<BooleanExpression> getFilters(
            str.substring(1).eq(knownString),
            str.substring(1,2).eq(knownString),
            str.lower().eq(knownString),
+           str.likeIgnoreCase(knownString),
            str.upper().eq(knownString),
            str.matches(".*"),
            // java.util.Collection

diff --git a/querydsl-jpa/src/main/java/com/mysema/query/jpa/JPQLTemplates.java b/querydsl-jpa/src/main/java/com/mysema/query/jpa/JPQLTemplates.java
@@ -13,8 +13,11 @@
  */
 package com.mysema.query.jpa;
 
+import java.util.Set;
+
 import javax.annotation.Nullable;
 
+import com.google.common.collect.ImmutableSet;
 import com.mysema.query.types.Operator;
 import com.mysema.query.types.Ops;
 import com.mysema.query.types.PathType;
@@ -34,6 +37,13 @@ public class JPQLTemplates extends Templates {
 
     public static final JPQLTemplates DEFAULT = new JPQLTemplates();
 
+    protected static final Set<? extends Operator<?>> OTHER_LIKE_CASES
+            = ImmutableSet.<Operator<?>>of(Ops.MATCHES, Ops.MATCHES_IC,
+                    Ops.ENDS_WITH, Ops.ENDS_WITH_IC,
+                    Ops.LIKE_IC, Ops.LIKE_ESCAPE_IC,
+                    Ops.STARTS_WITH, Ops.STARTS_WITH_IC,
+                    Ops.STRING_CONTAINS, Ops.STRING_CONTAINS_IC);
+
     private final QueryHandler queryHandler;
 
     protected JPQLTemplates() {
@@ -52,10 +62,7 @@ protected JPQLTemplates(char escape, QueryHandler queryHandler) {
                  Ops.BETWEEN, Ops.COL_IS_EMPTY);
 
         // other like cases
-        setPrecedence(Precedence.COMPARISON, Ops.MATCHES, Ops.MATCHES_IC,
-                Ops.ENDS_WITH, Ops.ENDS_WITH_IC,
-                Ops.STARTS_WITH, Ops.STARTS_WITH_IC,
-                Ops.STRING_CONTAINS, Ops.STRING_CONTAINS_IC);
+        setPrecedence(Precedence.COMPARISON, OTHER_LIKE_CASES);
 
         add(Ops.CASE, "case {0} end");
         add(Ops.CASE_WHEN,  "when {0} then {1} {2}", 0);

diff --git a/querydsl-sql/src/main/java/com/mysema/query/sql/DB2Templates.java b/querydsl-sql/src/main/java/com/mysema/query/sql/DB2Templates.java
@@ -147,10 +147,7 @@ public DB2Templates(char escape, boolean quote) {
         setPrecedence(Precedence.COMPARISON, Ops.IS_NULL, Ops.IS_NOT_NULL, Ops.LIKE, Ops.LIKE_ESCAPE, Ops.BETWEEN,
                 Ops.IN, Ops.NOT_IN, Ops.EXISTS);
 
-        // other like cases
-        setPrecedence(Precedence.COMPARISON, Ops.ENDS_WITH, Ops.ENDS_WITH_IC,
-                Ops.STARTS_WITH, Ops.STARTS_WITH_IC,
-                Ops.STRING_CONTAINS, Ops.STRING_CONTAINS_IC);
+        setPrecedence(Precedence.COMPARISON, OTHER_LIKE_CASES);
 
         add(SQLOps.NEXTVAL, "next value for {0s}");
 

diff --git a/querydsl-sql/src/main/java/com/mysema/query/sql/HSQLDBTemplates.java b/querydsl-sql/src/main/java/com/mysema/query/sql/HSQLDBTemplates.java
@@ -58,10 +58,7 @@ public HSQLDBTemplates(char escape, boolean quote) {
         setPrecedence(Precedence.COMPARISON + 1, Ops.IS_NULL, Ops.IS_NOT_NULL, Ops.LIKE, Ops.LIKE_ESCAPE, Ops.BETWEEN,
                 Ops.IN, Ops.NOT_IN, Ops.EXISTS);
 
-        // other like cases
-        setPrecedence(Precedence.COMPARISON + 1, Ops.ENDS_WITH, Ops.ENDS_WITH_IC,
-                Ops.STARTS_WITH, Ops.STARTS_WITH_IC,
-                Ops.STRING_CONTAINS, Ops.STRING_CONTAINS_IC);
+        setPrecedence(Precedence.COMPARISON + 1, OTHER_LIKE_CASES);
 
         add(Ops.TRIM, "trim(both from {0})");
         add(Ops.NEGATE, "{0} * -1", Precedence.ARITH_HIGH);

diff --git a/querydsl-sql/src/main/java/com/mysema/query/sql/OracleTemplates.java b/querydsl-sql/src/main/java/com/mysema/query/sql/OracleTemplates.java
@@ -77,10 +77,7 @@ public OracleTemplates(char escape, boolean quote) {
         setPrecedence(Precedence.COMPARISON + 1, Ops.IS_NULL, Ops.IS_NOT_NULL, Ops.LIKE, Ops.LIKE_ESCAPE, Ops.BETWEEN,
                 Ops.IN, Ops.NOT_IN, Ops.EXISTS);
 
-        // other like cases
-        setPrecedence(Precedence.COMPARISON + 1, Ops.ENDS_WITH, Ops.ENDS_WITH_IC,
-                Ops.STARTS_WITH, Ops.STARTS_WITH_IC,
-                Ops.STRING_CONTAINS, Ops.STRING_CONTAINS_IC);
+        setPrecedence(Precedence.COMPARISON + 1, OTHER_LIKE_CASES);
 
         add(Ops.ALIAS, "{0} {1}");
         add(SQLOps.NEXTVAL, "{0s}.nextval");