DATAJDBC-309 - Add infrastructure for semantic SQL generation

pom.xml

@@ -5,7 +5,7 @@
 
 	<groupId>org.springframework.data</groupId>
 	<artifactId>spring-data-relational-parent</artifactId>
-	<version>1.1.0.BUILD-SNAPSHOT</version>
+	<version>1.1.0.DATAJDBC-309-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<name>Spring Data Relational Parent</name>

spring-data-jdbc-distribution/pom.xml

@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.data</groupId>
 		<artifactId>spring-data-relational-parent</artifactId>
-		<version>1.1.0.BUILD-SNAPSHOT</version>
+		<version>1.1.0.DATAJDBC-309-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 

spring-data-jdbc/pom.xml

@@ -5,7 +5,7 @@
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>spring-data-jdbc</artifactId>
-	<version>1.1.0.BUILD-SNAPSHOT</version>
+	<version>1.1.0.DATAJDBC-309-SNAPSHOT</version>
 
 	<name>Spring Data JDBC</name>
 	<description>Spring Data module for JDBC repositories.</description>
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.data</groupId>
 		<artifactId>spring-data-relational-parent</artifactId>
-		<version>1.1.0.BUILD-SNAPSHOT</version>
+		<version>1.1.0.DATAJDBC-309-SNAPSHOT</version>
 	</parent>
 
 	<properties>

spring-data-relational/pom.xml

@@ -5,15 +5,15 @@
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>spring-data-relational</artifactId>
-	<version>1.1.0.BUILD-SNAPSHOT</version>
+	<version>1.1.0.DATAJDBC-309-SNAPSHOT</version>
 
 	<name>Spring Data Relational</name>
 	<description>Spring Data Relational support</description>
 
 	<parent>
 		<groupId>org.springframework.data</groupId>
 		<artifactId>spring-data-relational-parent</artifactId>
-		<version>1.1.0.BUILD-SNAPSHOT</version>
+		<version>1.1.0.DATAJDBC-309-SNAPSHOT</version>
 	</parent>
 
 	<properties>

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/AbstractSegment.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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.springframework.data.relational.core.sql;
+
+import org.springframework.util.Assert;
+
+/**
+ * Abstract implementation to support {@link Segment} implementations.
+ *
+ * @author Mark Paluch
+ * @since 1.1
+ */
+abstract class AbstractSegment implements Segment {
+
+	private final Segment[] children;
+
+	protected AbstractSegment(Segment... children) {
+		this.children = children;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.relational.core.sql.Visitable#visit(org.springframework.data.relational.core.sql.Visitor)
+	 */
+	@Override
+	public void visit(Visitor visitor) {
+
+		Assert.notNull(visitor, "Visitor must not be null!");
+
+		visitor.enter(this);
+		for (Segment child : children) {
+			child.visit(visitor);
+		}
+		visitor.leave(this);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.lang.Object#hashCode()
+	 */
+	@Override
+	public int hashCode() {
+		return toString().hashCode();
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.lang.Object#equals(java.lang.Object)
+	 */
+	@Override
+	public boolean equals(Object obj) {
+		return obj instanceof Segment && toString().equals(obj.toString());
+	}
+}

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/Aliased.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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.springframework.data.relational.core.sql;
+
+/**
+ * Aliased element exposing an {@link #getAlias() alias}.
+ *
+ * @author Mark Paluch
+ * @since 1.1
+ */
+public interface Aliased {
+
+	/**
+	 * @return the alias name.
+	 */
+	String getAlias();
+}

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/AliasedExpression.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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.springframework.data.relational.core.sql;
+
+/**
+ * An expression with an alias.
+ *
+ * @author Jens Schauder
+ * @since 1.1
+ */
+class AliasedExpression extends AbstractSegment implements Aliased, Expression {
+
+	private final Expression expression;
+	private final String alias;
+
+	public AliasedExpression(Expression expression, String alias) {
+
+		super(expression);
+
+		this.expression = expression;
+		this.alias = alias;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.relational.core.sql.Aliased#getAlias()
+	 */
+	@Override
+	public String getAlias() {
+		return alias;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+		return expression.toString() + " AS " + alias;
+	}
+}

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/AndCondition.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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.springframework.data.relational.core.sql;
+
+/**
+ * {@link Condition} representing an {@code AND} relation between two {@link Condition}s.
+ *
+ * @author Mark Paluch
+ * @since 1.1
+ * @see Condition#and(Condition)
+ */
+public class AndCondition extends MultipleCondition {
+
+	AndCondition(Condition... conditions) {
+		super(" AND ", conditions);
+	}
+}

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/AsteriskFromTable.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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.springframework.data.relational.core.sql;
+
+/**
+ * {@link Segment} to select all columns from a {@link Table}.
+ * <p/>
+ * * Renders to: {@code
+ *
+<table>
+ * .*} as in {@code SELECT
+ *
+<table>
+ * .* FROM …}.
+ *
+ * @author Mark Paluch
+ * @since 1.1
+ * @see Table#asterisk()
+ */
+public class AsteriskFromTable extends AbstractSegment implements Expression {
+
+	private final Table table;
+
+	AsteriskFromTable(Table table) {
+		super(table);
+		this.table = table;
+	}
+
+	public static AsteriskFromTable create(Table table) {
+		return new AsteriskFromTable(table);
+	}
+
+	/**
+	 * @return the associated {@link Table}.
+	 */
+	public Table getTable() {
+		return table;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+
+		if (table instanceof Aliased) {
+			return ((Aliased) table).getAlias() + ".*";
+		}
+
+		return table.toString() + ".*";
+	}
+}

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/BindMarker.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 the original author or authors.
+ *
+ * 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.springframework.data.relational.core.sql;
+
+import org.springframework.lang.Nullable;
+
+/**
+ * Bind marker/parameter placeholder used to construct prepared statements with parameter substitution.
+ *
+ * @author Mark Paluch
+ * @since 1.1
+ */
+public class BindMarker extends AbstractSegment implements Expression {
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+		return "?";
+	}
+
+	static class NamedBindMarker extends BindMarker implements Named {
+
+		private final String name;
+
+		NamedBindMarker(String name) {
+			this.name = name;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.relational.core.sql.Named#getName()
+		 */
+		@Nullable
+		@Override
+		public String getName() {
+			return name;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.relational.core.sql.BindMarker#toString()
+		 */
+		@Override
+		public String toString() {
+			return "?[" + name + "]";
+		}
+	}
+}