FieldBreakpoint.java

package jetbrains.mps.debugger.java.runtime.breakpoints;

/*Generated by MPS */

import jetbrains.mps.debug.api.breakpoints.ILocationBreakpoint;
import org.apache.log4j.Logger;
import org.apache.log4j.LogManager;
import org.jetbrains.mps.openapi.model.SNodeReference;
import jetbrains.mps.debug.api.breakpoints.BreakpointLocation;
import org.jetbrains.annotations.NotNull;
import com.intellij.openapi.project.Project;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.annotations.Nullable;
import jetbrains.mps.debugger.java.runtime.engine.events.EventsProcessor;
import com.sun.jdi.ReferenceType;
import jetbrains.mps.debugger.java.runtime.engine.RequestManager;
import jetbrains.mps.textgen.trace.TraceablePositionInfo;
import com.sun.jdi.Field;
import jetbrains.mps.debugger.java.api.evaluation.EvaluationUtils;
import com.sun.jdi.ClassType;
import com.sun.jdi.request.AccessWatchpointRequest;
import com.sun.jdi.request.ModificationWatchpointRequest;
import com.sun.jdi.ClassNotPreparedException;
import com.sun.jdi.ObjectCollectedException;
import com.sun.jdi.InternalException;

public class FieldBreakpoint extends JavaBreakpoint implements ILocationBreakpoint {
  private static final Logger LOG = LogManager.getLogger(FieldBreakpoint.class);
  private final SNodeReference myNode;
  private BreakpointLocation myLocation;

  public FieldBreakpoint(@NotNull SNodeReference nodePointer, Project project) {
    super(project);
    myNode = nodePointer;
  }
  public FieldBreakpoint(@NotNull SNode node, Project project) {
    this(node.getReference(), project);
  }

  @NotNull
  @Override
  public BreakpointLocation getLocation() {
    if (myLocation == null) {
      myLocation = new BreakpointLocationUpdate(myNode, getRepository()).get();
    }
    return myLocation;
  }

  @Override
  @Nullable
  protected String getClassNameToPrepare() {
    return getLocation().getTargetUnitName();
  }
  @NotNull
  @Override
  public JavaBreakpointKind getKind() {
    return JavaBreakpointKind.FIELD_BREAKPOINT;
  }
  @Override
  public String getPresentation() {
    return new BreakpointPresentation(getLocation(), getRepository()).getText();
  }
  @Override
  protected void createRequestForPreparedClass(EventsProcessor debugProcess, ReferenceType classType) {
    RequestManager requestManager = debugProcess.getRequestManager();
    TraceablePositionInfo targetCodePosition = getLocation().getTargetCodePosition();
    String fieldName = (targetCodePosition == null ? null : targetCodePosition.getPropertyString());
    if ((fieldName == null || fieldName.length() == 0)) {
      return;
    }
    try {
      Field field = EvaluationUtils.getInstance().findField((ClassType) classType, fieldName);
      AccessWatchpointRequest fieldAccessRequest = requestManager.createFieldAccessRequest(this, field);
      ModificationWatchpointRequest fieldModificationRequest = requestManager.createFieldModificationRequest(this, field);
      requestManager.enableRequest(fieldAccessRequest);
      requestManager.enableRequest(fieldModificationRequest);
    } catch (ClassNotPreparedException ex) {
      LOG.warn("ClassNotPreparedException: " + ex.getMessage());
      //  there's a chance to add a breakpoint when the class is prepared 
    } catch (ObjectCollectedException ex) {
      LOG.warn("ObjectCollectedException: " + ex.getMessage());
    } catch (InternalException ex) {
      LOG.error(null, ex);
    } catch (Exception ex) {
      LOG.error(null, ex);
    }
  }
  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    return eq_he6f5h_a0d0n(getLocation(), ((FieldBreakpoint) o).getLocation());
  }
  @Override
  public int hashCode() {
    return myNode.hashCode() + getKind().hashCode() * 31;
  }
  private static boolean eq_he6f5h_a0d0n(Object a, Object b) {
    return (a != null ? a.equals(b) : a == b);
  }
}