101 lines
3.4 KiB
Java
101 lines
3.4 KiB
Java
//: annotations/database/TableCreationProcessorFactory.java
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// The database example using Visitor.
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// {CompileTimeError} Not working in Java 8
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// {Exec: apt -factory
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// annotations.database.TableCreationProcessorFactory
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// database/Member.java -s database}
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package annotations.database;
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import com.sun.mirror.apt.*;
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import com.sun.mirror.declaration.*;
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import com.sun.mirror.util.*;
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import java.util.*;
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import static com.sun.mirror.util.DeclarationVisitors.*;
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public class TableCreationProcessorFactory
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implements AnnotationProcessorFactory {
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public AnnotationProcessor getProcessorFor(
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Set<AnnotationTypeDeclaration> atds,
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AnnotationProcessorEnvironment env) {
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return new TableCreationProcessor(env);
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}
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public Collection<String> supportedAnnotationTypes() {
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return Arrays.asList(
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"annotations.database.DBTable",
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"annotations.database.Constraints",
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"annotations.database.SQLString",
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"annotations.database.SQLInteger");
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}
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public Collection<String> supportedOptions() {
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return Collections.emptySet();
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}
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private static class TableCreationProcessor
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implements AnnotationProcessor {
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private final AnnotationProcessorEnvironment env;
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private String sql = "";
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public TableCreationProcessor(
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AnnotationProcessorEnvironment env) {
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this.env = env;
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}
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public void process() {
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for(TypeDeclaration typeDecl :
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env.getSpecifiedTypeDeclarations()) {
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typeDecl.accept(getDeclarationScanner(
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new TableCreationVisitor(), NO_OP));
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sql = sql.substring(0, sql.length() - 1) + ");";
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System.out.println("creation SQL is :\n" + sql);
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sql = "";
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}
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}
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private class TableCreationVisitor
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extends SimpleDeclarationVisitor {
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public void visitClassDeclaration(
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ClassDeclaration d) {
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DBTable dbTable = d.getAnnotation(DBTable.class);
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if(dbTable != null) {
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sql += "CREATE TABLE ";
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sql += (dbTable.name().length() < 1)
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? d.getSimpleName().toUpperCase()
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: dbTable.name();
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sql += " (";
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}
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}
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public void visitFieldDeclaration(
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FieldDeclaration d) {
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String columnName = "";
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if(d.getAnnotation(SQLInteger.class) != null) {
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SQLInteger sInt = d.getAnnotation(
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SQLInteger.class);
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// Use field name if name not specified
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if(sInt.name().length() < 1)
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columnName = d.getSimpleName().toUpperCase();
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else
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columnName = sInt.name();
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sql += "\n " + columnName + " INT" +
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getConstraints(sInt.constraints()) + ",";
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}
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if(d.getAnnotation(SQLString.class) != null) {
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SQLString sString = d.getAnnotation(
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SQLString.class);
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// Use field name if name not specified.
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if(sString.name().length() < 1)
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columnName = d.getSimpleName().toUpperCase();
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else
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columnName = sString.name();
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sql += "\n " + columnName + " VARCHAR(" +
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sString.value() + ")" +
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getConstraints(sString.constraints()) + ",";
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}
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}
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private String getConstraints(Constraints con) {
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String constraints = "";
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if(!con.allowNull())
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constraints += " NOT NULL";
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if(con.primaryKey())
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constraints += " PRIMARY KEY";
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if(con.unique())
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constraints += " UNIQUE";
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return constraints;
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}
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}
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}
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} ///:~ |