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;
008
009/**
010 * Changes the existing constructor to remove all the field initialisation as these are going to be
011 * initialised lazily by calls to our generated methods.
012 */
013public class TypeQueryAssocBasicConstructor extends BaseConstructorAdapter implements Opcodes, Constants {
014
015
016  private final ClassInfo classInfo;
017
018  private final ClassVisitor cv;
019
020  private final String desc;
021
022  private final String signature;
023
024  /**
025  * Construct for a query bean class given its associated entity bean domain class and a class visitor.
026  */
027  public TypeQueryAssocBasicConstructor(ClassInfo classInfo, ClassVisitor cv, String desc, String signature) {
028    super();
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
038    mv = cv.visitMethod(ACC_PUBLIC, INIT, desc, signature, null);
039    mv.visitCode();
040    Label l0 = new Label();
041    mv.visitLabel(l0);
042    mv.visitLineNumber(1, l0);
043    mv.visitVarInsn(ALOAD, 0);
044    mv.visitVarInsn(ALOAD, 1);
045    mv.visitVarInsn(ALOAD, 2);
046    mv.visitInsn(ACONST_NULL);
047    mv.visitMethodInsn(INVOKESPECIAL, TQ_ASSOC_BEAN, INIT, "(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/String;)V", false);
048    Label l1 = new Label();
049    mv.visitLabel(l1);
050    mv.visitLineNumber(2, l1);
051    mv.visitInsn(RETURN);
052    Label l2 = new Label();
053    mv.visitLabel(l2);
054    mv.visitLocalVariable("this", "L"+classInfo.getClassName()+";", "L"+classInfo.getClassName()+"<TR;>;", l0, l2, 0);
055    mv.visitLocalVariable("name", "Ljava/lang/String;", null, l0, l2, 1);
056    mv.visitLocalVariable("root", "Ljava/lang/Object;", "TR;", l0, l2, 2);
057    mv.visitLocalVariable("depth", "I", null, l0, l2, 3);
058    mv.visitMaxs(4, 4);
059    mv.visitEnd();
060  }
061
062}