001package io.ebean.enhance.querybean;
002
003import io.ebean.enhance.asm.ClassVisitor;
004import io.ebean.enhance.asm.Label;
005import io.ebean.enhance.asm.Opcodes;
006
007import static io.ebean.enhance.common.EnhanceConstants.INIT;
008import static io.ebean.enhance.common.EnhanceConstants.L_OBJECT;
009import static io.ebean.enhance.common.EnhanceConstants.L_STRING;
010
011/**
012 * Changes the existing constructor to remove all the field initialisation as these are going to be
013 * initialised lazily by calls to our generated methods.
014 */
015public class TypeQueryAssocBasicConstructor extends BaseConstructorAdapter implements Opcodes, Constants {
016
017  private final ClassInfo classInfo;
018  private final ClassVisitor cv;
019  private final String superName;
020  private final String desc;
021  private final String signature;
022
023  /**
024   * Construct for a query bean class given its associated entity bean domain class and a class visitor.
025   */
026  public TypeQueryAssocBasicConstructor(String superName, ClassInfo classInfo, ClassVisitor cv, String desc, String signature) {
027    super();
028    this.superName = superName;
029    this.cv = cv;
030    this.classInfo = classInfo;
031    this.desc = desc;
032    this.signature = signature;
033  }
034
035  @Override
036  public void visitCode() {
037    mv = cv.visitMethod(ACC_PUBLIC, INIT, desc, signature, null);
038    mv.visitCode();
039    Label l0 = new Label();
040    mv.visitLabel(l0);
041    mv.visitLineNumber(1, l0);
042    mv.visitVarInsn(ALOAD, 0);
043    mv.visitVarInsn(ALOAD, 1);
044    mv.visitVarInsn(ALOAD, 2);
045    mv.visitInsn(ACONST_NULL);
046    mv.visitMethodInsn(INVOKESPECIAL, superName, INIT, "(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/String;)V", false);
047    Label l1 = new Label();
048    mv.visitLabel(l1);
049    mv.visitLineNumber(2, l1);
050    mv.visitInsn(RETURN);
051    Label l2 = new Label();
052    mv.visitLabel(l2);
053    mv.visitLocalVariable("this", "L" + classInfo.getClassName() + ";", "L" + classInfo.getClassName() + "<TR;>;", l0, l2, 0);
054    mv.visitLocalVariable("name", L_STRING, null, l0, l2, 1);
055    mv.visitLocalVariable("root", L_OBJECT, "TR;", l0, l2, 2);
056    mv.visitLocalVariable("depth", "I", null, l0, l2, 3);
057    mv.visitMaxs(4, 4);
058    mv.visitEnd();
059  }
060
061}