feat(col): add per-type shorthand classes in builder.col package

Each class in the new col package wraps a single ColumnType constant or
factory method behind a concise name and a uniform of() / of(params)
factory. Developers can use a wildcard import to write:

    import com.github.ezframework.javaquerybuilder.query.builder.col.*;

    .column("id",         Int.of().notNull().autoIncrement())
    .column("username",   VarChar.of(64).notNull().unique())
    .column("price",      Decimal.of(10, 2))
    .column("created_at", Timestamp.of())

instead of prefixing every type with ColumnType.

Classes added (31 total):
  Fixed types: TinyInt, SmallInt, Int, BigInt, SqlFloat, SqlDouble,
    Real, Bool, Text, TinyText, MediumText, LongText, Clob,
    Blob, TinyBlob, MediumBlob, LongBlob, Date, Time, DateTime,
    Json, Serial, BigSerial, Uuid
  Parameterised types: Timestamp (overloaded of() / of(int)),
    VarChar, Char, Decimal, Numeric, Binary, VarBinary

  - SqlFloat / SqlDouble / Bool named to avoid shadowing java.lang types
    when the package is wildcard-imported
  - ColTypesTest: 34 tests covering all classes and modifier chaining

Author: ez-plugins

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/BigInt.java

@@ -0,0 +1,33 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code BIGINT}.
+ *
+ * <p>Delegates to {@link ColumnType#BIGINT}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("user_id", BigInt.of().notNull())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#BIGINT
+ */
+public final class BigInt {
+
+    /** Prevent instantiation. */
+    private BigInt() {
+    }
+
+    /**
+     * Returns the {@code BIGINT} column type.
+     *
+     * @return a {@link ColumnType} representing {@code BIGINT}
+     */
+    public static ColumnType of() {
+        return ColumnType.BIGINT;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/BigSerial.java

@@ -0,0 +1,33 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code BIGSERIAL} (auto-incrementing 8-byte integer; PostgreSQL).
+ *
+ * <p>Delegates to {@link ColumnType#BIGSERIAL}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("id", BigSerial.of())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#BIGSERIAL
+ */
+public final class BigSerial {
+
+    /** Prevent instantiation. */
+    private BigSerial() {
+    }
+
+    /**
+     * Returns the {@code BIGSERIAL} column type.
+     *
+     * @return a {@link ColumnType} representing {@code BIGSERIAL}
+     */
+    public static ColumnType of() {
+        return ColumnType.BIGSERIAL;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Binary.java

@@ -0,0 +1,34 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code BINARY(length)} (fixed-length binary string).
+ *
+ * <p>Delegates to {@link ColumnType#binary(int)}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("hash", Binary.of(32).notNull())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#binary(int)
+ */
+public final class Binary {
+
+    /** Prevent instantiation. */
+    private Binary() {
+    }
+
+    /**
+     * Returns the {@code BINARY(length)} column type.
+     *
+     * @param length number of bytes; must be positive
+     * @return a {@link ColumnType} representing {@code BINARY(length)}
+     */
+    public static ColumnType of(final int length) {
+        return ColumnType.binary(length);
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Blob.java

@@ -0,0 +1,33 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code BLOB} (binary large object).
+ *
+ * <p>Delegates to {@link ColumnType#BLOB}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("data", Blob.of())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#BLOB
+ */
+public final class Blob {
+
+    /** Prevent instantiation. */
+    private Blob() {
+    }
+
+    /**
+     * Returns the {@code BLOB} column type.
+     *
+     * @return a {@link ColumnType} representing {@code BLOB}
+     */
+    public static ColumnType of() {
+        return ColumnType.BLOB;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Bool.java

@@ -0,0 +1,34 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code BOOLEAN}.
+ *
+ * <p>Named {@code Bool} to avoid shadowing {@link java.lang.Boolean}.
+ * Delegates to {@link ColumnType#BOOLEAN}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("active", Bool.of().notNull().defaultValue("true"))
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#BOOLEAN
+ */
+public final class Bool {
+
+    /** Prevent instantiation. */
+    private Bool() {
+    }
+
+    /**
+     * Returns the {@code BOOLEAN} column type.
+     *
+     * @return a {@link ColumnType} representing {@code BOOLEAN}
+     */
+    public static ColumnType of() {
+        return ColumnType.BOOLEAN;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Char.java

@@ -0,0 +1,34 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code CHAR(length)} (fixed-length character string).
+ *
+ * <p>Delegates to {@link ColumnType#charType(int)}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("country_code", Char.of(2).notNull())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#charType(int)
+ */
+public final class Char {
+
+    /** Prevent instantiation. */
+    private Char() {
+    }
+
+    /**
+     * Returns the {@code CHAR(length)} column type.
+     *
+     * @param length number of characters; must be positive
+     * @return a {@link ColumnType} representing {@code CHAR(length)}
+     */
+    public static ColumnType of(final int length) {
+        return ColumnType.charType(length);
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Clob.java

@@ -0,0 +1,33 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code CLOB} (character large object; standard SQL).
+ *
+ * <p>Delegates to {@link ColumnType#CLOB}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("report", Clob.of())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#CLOB
+ */
+public final class Clob {
+
+    /** Prevent instantiation. */
+    private Clob() {
+    }
+
+    /**
+     * Returns the {@code CLOB} column type.
+     *
+     * @return a {@link ColumnType} representing {@code CLOB}
+     */
+    public static ColumnType of() {
+        return ColumnType.CLOB;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Date.java

@@ -0,0 +1,33 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code DATE} (calendar date without time-of-day).
+ *
+ * <p>Delegates to {@link ColumnType#DATE}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("birth_date", Date.of().notNull())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#DATE
+ */
+public final class Date {
+
+    /** Prevent instantiation. */
+    private Date() {
+    }
+
+    /**
+     * Returns the {@code DATE} column type.
+     *
+     * @return a {@link ColumnType} representing {@code DATE}
+     */
+    public static ColumnType of() {
+        return ColumnType.DATE;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/DateTime.java

@@ -0,0 +1,34 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code DATETIME} (date and time without timezone;
+ * MySQL / MariaDB / SQLite).
+ *
+ * <p>Delegates to {@link ColumnType#DATETIME}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("scheduled_at", DateTime.of().notNull())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#DATETIME
+ */
+public final class DateTime {
+
+    /** Prevent instantiation. */
+    private DateTime() {
+    }
+
+    /**
+     * Returns the {@code DATETIME} column type.
+     *
+     * @return a {@link ColumnType} representing {@code DATETIME}
+     */
+    public static ColumnType of() {
+        return ColumnType.DATETIME;
+    }
+}

src/main/java/com/github/ezframework/javaquerybuilder/query/builder/col/Decimal.java

@@ -0,0 +1,35 @@
+package com.github.ezframework.javaquerybuilder.query.builder.col;
+
+import com.github.ezframework.javaquerybuilder.query.builder.ColumnType;
+
+/**
+ * Column type shorthand for {@code DECIMAL(precision, scale)}.
+ *
+ * <p>Delegates to {@link ColumnType#decimal(int, int)}. Use modifier methods on the
+ * returned {@link ColumnType} to append column-level constraints:</p>
+ *
+ * <pre>{@code
+ * .column("price", Decimal.of(10, 2).notNull())
+ * }</pre>
+ *
+ * @author EzFramework
+ * @version 1.1.0
+ * @see ColumnType#decimal(int, int)
+ */
+public final class Decimal {
+
+    /** Prevent instantiation. */
+    private Decimal() {
+    }
+
+    /**
+     * Returns the {@code DECIMAL(precision, scale)} column type.
+     *
+     * @param precision total number of significant digits; must be positive
+     * @param scale     number of digits after the decimal point; must be &ge; 0
+     * @return a {@link ColumnType} representing {@code DECIMAL(precision, scale)}
+     */
+    public static ColumnType of(final int precision, final int scale) {
+        return ColumnType.decimal(precision, scale);
+    }
+}