drop old backends

plugins/org.chromium.sdk.wipbackend.wk118685/src/org/chromium/sdk/internal/wip/WipContextBuilder.java

Index: plugins/org.chromium.sdk.wipbackend.wk118685/src/org/chromium/sdk/internal/wip/WipContextBuilder.java
diff --git a/plugins/org.chromium.sdk.wipbackend.wk118685/src/org/chromium/sdk/internal/wip/WipContextBuilder.java b/plugins/org.chromium.sdk.wipbackend.wk118685/src/org/chromium/sdk/internal/wip/WipContextBuilder.java
deleted file mode 100644
index 1dedd7b6d5e01368126fa7e801ea22c5ea4d654f..0000000000000000000000000000000000000000
--- a/plugins/org.chromium.sdk.wipbackend.wk118685/src/org/chromium/sdk/internal/wip/WipContextBuilder.java
+++ /dev/null
@@ -1,701 +0,0 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.sdk.internal.wip;
-
-import static org.chromium.sdk.util.BasicUtil.getSafe;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import org.chromium.sdk.Breakpoint;
-import org.chromium.sdk.CallFrame;
-import org.chromium.sdk.DebugContext;
-import org.chromium.sdk.DebugContext.StepAction;
-import org.chromium.sdk.ExceptionData;
-import org.chromium.sdk.JavascriptVm;
-import org.chromium.sdk.JsEvaluateContext;
-import org.chromium.sdk.JsObject;
-import org.chromium.sdk.JsScope;
-import org.chromium.sdk.JsValue;
-import org.chromium.sdk.JsVariable;
-import org.chromium.sdk.RelayOk;
-import org.chromium.sdk.RemoteValueMapping;
-import org.chromium.sdk.SyncCallback;
-import org.chromium.sdk.TextStreamPosition;
-import org.chromium.sdk.internal.protocolparser.JsonProtocolParseException;
-import org.chromium.sdk.internal.wip.WipExpressionBuilder.ValueNameBuilder;
-import org.chromium.sdk.internal.wip.WipValueLoader.Getter;
-import org.chromium.sdk.internal.wip.protocol.WipParserAccess;
-import org.chromium.sdk.internal.wip.protocol.input.WipCommandResponse;
-import org.chromium.sdk.internal.wip.protocol.input.debugger.CallFrameValue;
-import org.chromium.sdk.internal.wip.protocol.input.debugger.EvaluateOnCallFrameData;
-import org.chromium.sdk.internal.wip.protocol.input.debugger.PausedEventData;
-import org.chromium.sdk.internal.wip.protocol.input.debugger.ResumedEventData;
-import org.chromium.sdk.internal.wip.protocol.input.debugger.ScopeValue;
-import org.chromium.sdk.internal.wip.protocol.input.runtime.EvaluateData;
-import org.chromium.sdk.internal.wip.protocol.input.runtime.PropertyDescriptorValue;
-import org.chromium.sdk.internal.wip.protocol.input.runtime.RemoteObjectValue;
-import org.chromium.sdk.internal.wip.protocol.output.WipParams;
-import org.chromium.sdk.internal.wip.protocol.output.WipParamsWithResponse;
-import org.chromium.sdk.internal.wip.protocol.output.debugger.EvaluateOnCallFrameParams;
-import org.chromium.sdk.internal.wip.protocol.output.debugger.ResumeParams;
-import org.chromium.sdk.internal.wip.protocol.output.debugger.StepIntoParams;
-import org.chromium.sdk.internal.wip.protocol.output.debugger.StepOutParams;
-import org.chromium.sdk.internal.wip.protocol.output.debugger.StepOverParams;
-import org.chromium.sdk.internal.wip.protocol.output.runtime.EvaluateParams;
-import org.chromium.sdk.util.AsyncFutureRef;
-import org.chromium.sdk.util.GenericCallback;
-import org.chromium.sdk.util.LazyConstructable;
-import org.chromium.sdk.util.MethodIsBlockingException;
-import org.chromium.sdk.util.RelaySyncCallback;
-import org.json.simple.JSONObject;
-
-/**
- * Builder for {@link DebugContext} that works with Wip protocol.
- */
-class WipContextBuilder {
-  private static final Logger LOGGER = Logger.getLogger(WipContextBuilder.class.getName());
-
-  private final WipTabImpl tabImpl;
-  private final EvaluateHack evaluateHack;
-  private WipDebugContextImpl currentContext = null;
-
-  WipContextBuilder(WipTabImpl tabImpl) {
-    this.tabImpl = tabImpl;
-    this.evaluateHack = new EvaluateHack(tabImpl);
-  }
-
-  // Called from Dispatch Thread.
-  RelayOk updateStackTrace(List<CallFrameValue> callFrames,
-      GenericCallback<Void> callback, final SyncCallback syncCallback) {
-    if (currentContext == null) {
-      if (callback != null) {
-        callback.success(null);
-      }
-      return RelaySyncCallback.finish(syncCallback);
-    } else {
-      return currentContext.setFrames(callFrames, callback, syncCallback);
-    }
-  }
-
-  void createContext(PausedEventData data) {
-    if (currentContext != null) {
-      LOGGER.severe("Context is already created");
-      currentContext = null;
-    }
-
-    final WipDebugContextImpl context = new WipDebugContextImpl(data);
-    currentContext = context;
-
-    GenericCallback<Void> callback = new GenericCallback<Void>() {
-      @Override
-      public void success(Void value) {
-        tabImpl.getDebugListener().getDebugEventListener().suspended(context);
-      }
-
-      @Override
-      public void failure(Exception exception) {
-        throw new RuntimeException(exception);
-      }
-    };
-
-    context.setFrames(data.callFrames(), callback, null);
-  }
-
-  EvaluateHack getEvaluateHack() {
-    return evaluateHack;
-  }
-
-  void onResumeReportedFromRemote(ResumedEventData event) {
-    if (currentContext == null) {
-      throw new IllegalStateException();
-    }
-    WipDebugContextImpl context = currentContext;
-    currentContext = null;
-    this.tabImpl.getDebugListener().getDebugEventListener().resumed();
-    context.reportClosed();
-  }
-
-  class WipDebugContextImpl implements DebugContext {
-    private volatile List<CallFrameImpl> frames = null;
-    private final ExceptionData exceptionData;
-    private final AtomicReference<CloseRequest> closeRequest =
-        new AtomicReference<CloseRequest>(null);
-    private final JsEvaluateContext globalContext;
-
-    public WipDebugContextImpl(PausedEventData data) {
-      PausedEventData.Data additionalData = data.data();
-      if (data.reason() == PausedEventData.Reason.EXCEPTION && additionalData != null) {
-        RemoteObjectValue exceptionRemoteObject;
-        try {
-          JSONObject additionalDataObject = additionalData.getUnderlyingObject();
-          exceptionRemoteObject =
-              WipParserAccess.get().parseRemoteObjectValue(additionalDataObject);
-        } catch (JsonProtocolParseException e) {
-          throw new RuntimeException("Failed to parse exception data", e);
-        }
-        JsValue exceptionValue =
-            valueLoader.getValueBuilder().wrap(exceptionRemoteObject, null);
-        exceptionData = new ExceptionDataImpl(exceptionValue);
-      } else {
-        exceptionData = null;
-      }
-      globalContext = new GlobalEvaluateContext(getValueLoader());
-    }
-
-    RelayOk setFrames(List<CallFrameValue> frameDataList,
-        final GenericCallback<Void> callback, final SyncCallback syncCallback) {
-      frames = new ArrayList<CallFrameImpl>(frameDataList.size());
-      for (CallFrameValue frameData : frameDataList) {
-        frames.add(new CallFrameImpl(frameData));
-      }
-
-      return tabImpl.getScriptManager().loadScriptSourcesAsync(getScriptIds(),
-          new WipScriptManager.ScriptSourceLoadCallback() {
-            @Override
-            public void done(Map<String, WipScriptImpl> loadedScripts) {
-              setScripts(loadedScripts);
-
-              if (callback != null) {
-                callback.success(null);
-              }
-            }
-          },
-          syncCallback);
-    }
-
-    void resetFrames(List<CallFrameValue> frameDataList) {
-      List<CallFrameImpl> newFrames = new ArrayList<CallFrameImpl>(frameDataList.size());
-      for (int i = 0; i < frameDataList.size(); i++) {
-        CallFrameImpl callFrameImpl = new CallFrameImpl(frameDataList.get(i));
-        callFrameImpl.setScript(frames.get(i).getScript());
-        newFrames.add(callFrameImpl);
-      }
-      frames = newFrames;
-    }
-
-    WipValueLoader getValueLoader() {
-      return valueLoader;
-    }
-
-    void reportClosed() {
-      CloseRequest request = this.closeRequest.get();
-      if (request != null && request.callback != null) {
-        request.callback.success();
-      }
-    }
-
-    Set<String> getScriptIds() {
-      Set<String> scriptIds = new HashSet<String>();
-      for (CallFrameImpl frame : frames) {
-        String sourceId = frame.getSourceId();
-        if (sourceId != null) {
-          scriptIds.add(sourceId);
-        }
-      }
-      return scriptIds;
-    }
-
-    void setScripts(Map<String, WipScriptImpl> loadedScripts) {
-      for (CallFrameImpl frame : frames) {
-        String sourceId = frame.getSourceId();
-        if (sourceId != null) {
-          WipScriptImpl script = getSafe(loadedScripts, sourceId);
-          // Script can be null.
-          frame.setScript(script);
-        }
-      }
-    }
-
-    @Override
-    public State getState() {
-      if (exceptionData == null) {
-        return State.NORMAL;
-      } else {
-        return State.EXCEPTION;
-      }
-    }
-
-    @Override
-    public ExceptionData getExceptionData() {
-      return exceptionData;
-    }
-
-    @Override
-    public Collection<? extends Breakpoint> getBreakpointsHit() {
-      if (frames.isEmpty()) {
-        return Collections.emptyList();
-      }
-      CallFrameImpl topFrame = frames.get(0);
-      return tabImpl.getBreakpointManager().findRelatedBreakpoints(topFrame);
-    }
-
-    @Override
-    public List<? extends CallFrame> getCallFrames() {
-      return frames;
-    }
-
-    @Override
-    public void continueVm(StepAction stepAction, int stepCount,
-        ContinueCallback callback) {
-      continueVm(stepAction, stepCount, callback, null);
-    }
-
-    @Override
-    public RelayOk continueVm(StepAction stepAction, int stepCount,
-        final ContinueCallback callback, SyncCallback syncCallback) {
-      {
-        boolean updated = closeRequest.compareAndSet(null, new CloseRequest(callback));
-        if (!updated) {
-          throw new IllegalStateException("Continue already requested");
-        }
-      }
-
-      WipParams params = sdkStepToProtocolStep(stepAction);
-
-      WipCommandCallback commandCallback;
-      if (callback == null) {
-        commandCallback = null;
-      } else {
-        commandCallback = new WipCommandCallback() {
-          @Override public void messageReceived(WipCommandResponse response) {
-            callback.success();
-          }
-          @Override public void failure(String message) {
-            callback.failure(message);
-          }
-        };
-      }
-      return tabImpl.getCommandProcessor().send(params, commandCallback, syncCallback);
-    }
-
-    @Override
-    public JsEvaluateContext getGlobalEvaluateContext() {
-      return globalContext;
-    }
-
-    @Override
-    public RemoteValueMapping getDefaultRemoteValueMapping() {
-      return valueLoader;
-    }
-
-    public WipTabImpl getTab() {
-      return tabImpl;
-    }
-
-    public WipCommandProcessor getCommandProcessor() {
-      return tabImpl.getCommandProcessor();
-    }
-
-    private class CloseRequest {
-      final ContinueCallback callback;
-
-      CloseRequest(ContinueCallback callback) {
-        this.callback = callback;
-      }
-    }
-
-    class CallFrameImpl implements CallFrame {
-      private final String functionName;
-      private final String id;
-      private final LazyConstructable<List<JsScope>> scopeData;
-      private final JsVariable thisObject;
-      private final TextStreamPosition streamPosition;
-      private final String sourceId;
-      private WipScriptImpl scriptImpl;
-
-      public CallFrameImpl(CallFrameValue frameData) {
-        functionName = frameData.functionName();
-        id = frameData.callFrameId();
-        sourceId = frameData.location().scriptId();
-        final List<ScopeValue> scopeDataList = frameData.scopeChain();
-
-        scopeData = LazyConstructable.create(new LazyConstructable.Factory<List<JsScope>>() {
-          @Override
-          public List<JsScope> construct() {
-            final List<JsScope> scopes = new ArrayList<JsScope>(scopeDataList.size());
-
-            for (int i = 0; i < scopeDataList.size(); i++) {
-              ScopeValue scopeData = scopeDataList.get(i);
-              scopes.add(createScope(scopeData, valueLoader));
-            }
-            return scopes;
-          }
-        });
-
-        RemoteObjectValue thisObjectData = frameData.getThis();
-        if (thisObjectData == null) {
-          LOGGER.log(Level.SEVERE, "Missing local scope", new Exception());
-          thisObject = null;
-        } else {
-          thisObject = createSimpleNameVariable("this", thisObjectData);
-        }
-
-        // 0-based.
-        final int line = (int) frameData.location().lineNumber();
-
-        // 0-based.
-        // TODO: check documentation, whether it's 0-based
-        Long columnObject = frameData.location().columnNumber();
-        final int column;
-        if (columnObject == null) {
-          column = 0;
-        } else {
-          column = columnObject.intValue();
-        }
-        streamPosition = new TextStreamPosition() {
-          @Override public int getOffset() {
-            return WipBrowserImpl.throwUnsupported();
-          }
-          @Override public int getLine() {
-            return line;
-          }
-
-          @Override public int getColumn() {
-            return column;
-          }
-        };
-      }
-
-      String getSourceId() {
-        return sourceId;
-      }
-
-      void setScript(WipScriptImpl scriptImpl) {
-        this.scriptImpl = scriptImpl;
-      }
-
-      @Override
-      public List<? extends JsScope> getVariableScopes() {
-        return scopeData.get();
-      }
-
-      @Override
-      public JsVariable getReceiverVariable() {
-        return thisObject;
-      }
-
-      @Override
-      public WipScriptImpl getScript() {
-        return scriptImpl;
-      }
-
-      @Override
-      public TextStreamPosition getStatementStartPosition() {
-        return streamPosition;
-      }
-
-      @Override
-      public String getFunctionName() {
-        return functionName;
-      }
-
-      @Override
-      public JsEvaluateContext getEvaluateContext() {
-        return evaluateContext;
-      }
-
-      private JsVariable createSimpleNameVariable(final String name,
-          RemoteObjectValue thisObjectData) {
-        ValueNameBuilder valueNameBuidler = WipExpressionBuilder.createRootName(name, false);
-        return valueLoader.getValueBuilder().createVariable(thisObjectData, valueNameBuidler);
-      }
-
-      private final WipEvaluateContextBase<?> evaluateContext =
-          new WipEvaluateContextBase<EvaluateOnCallFrameData>(getValueLoader()) {
-        @Override
-        protected WipParamsWithResponse<EvaluateOnCallFrameData> createRequestParams(
-            String expression, WipValueLoader destinationValueLoader) {
-          return new EvaluateOnCallFrameParams(id, expression,
-              destinationValueLoader.getObjectGroupId(), false, null, false);
-        }
-
-        @Override protected RemoteObjectValue getRemoteObjectValue(EvaluateOnCallFrameData data) {
-          return data.result();
-        }
-
-        @Override protected Boolean getWasThrown(EvaluateOnCallFrameData data) {
-          return data.wasThrown();
-        }
-      };
-    }
-
-    private class ExceptionDataImpl implements ExceptionData {
-      private final JsValue exceptionValue;
-
-      ExceptionDataImpl(JsValue exceptionValue) {
-        this.exceptionValue = exceptionValue;
-      }
-
-      @Override
-      public JsValue getExceptionValue() {
-        return exceptionValue;
-      }
-
-      @Override
-      public boolean isUncaught() {
-        // TODO: implement.
-        return false;
-      }
-
-      @Override
-      public String getSourceText() {
-        // Not supported.
-        return null;
-      }
-
-      @Override
-      public String getExceptionMessage() {
-        // TODO: implement.
-        return exceptionValue.getValueString();
-      }
-    }
-
-    @Override
-    public JavascriptVm getJavascriptVm() {
-      return tabImpl;
-    }
-
-    private final WipValueLoader valueLoader = new WipValueLoader(tabImpl) {
-      @Override
-      String getObjectGroupId() {
-        return null;
-      }
-    };
-  }
-
-  static JsScope createScope(ScopeValue scopeData, WipValueLoader valueLoader) {
-    JsScope.Type type = WIP_TO_SDK_SCOPE_TYPE.get(scopeData.type());
-    if (type == null) {
-      type = JsScope.Type.UNKNOWN;
-    }
-    if (type == JsScope.Type.WITH || type == JsScope.Type.GLOBAL) {
-      return new ObjectScopeImpl(scopeData, type, valueLoader);
-    } else {
-      return new DeclarativeScopeImpl(scopeData, type, valueLoader);
-    }
-  }
-
-  private static class DeclarativeScopeImpl implements JsScope.Declarative {
-    private final AsyncFutureRef<Getter<ScopeVariables>> propertiesRef =
-        new AsyncFutureRef<Getter<ScopeVariables>>();
-    private final String objectId;
-    private final Type type;
-    private final WipValueLoader valueLoader;
-
-    public DeclarativeScopeImpl(ScopeValue scopeData, Type type, WipValueLoader valueLoader) {
-      this.type = type;
-      this.objectId = scopeData.object().objectId();
-      this.valueLoader = valueLoader;
-    }
-
-    @Override public Type getType() {
-      return type;
-    }
-
-    @Override public Declarative asDeclarativeScope() {
-      return this;
-    }
-
-    @Override public ObjectBased asObjectBased() {
-      return null;
-    }
-
-    @Override public <R> R accept(Visitor<R> visitor) {
-      return visitor.visitDeclarative(this);
-    }
-
-    @Override
-    public List<? extends JsVariable> getVariables() throws MethodIsBlockingException {
-      int currentCacheState = valueLoader.getCacheState();
-      if (propertiesRef.isInitialized()) {
-        ScopeVariables result = propertiesRef.getSync().get();
-        if (result.cacheState == currentCacheState) {
-          return result.variables;
-        }
-        startLoadOperation(true, currentCacheState);
-      } else {
-        startLoadOperation(false, currentCacheState);
-      }
-
-      // This is blocking.
-      return propertiesRef.getSync().get().variables;
-    }
-
-    /**
-     * Starts load operation that works synchronously, i.e. it may block the calling method.
-     * This is done because some thread must take post-processing anyway and it shouldn't
-     * be the Dispatch thread.
-     * The method may not be blocking, if another thread is already doing the same operation.
-     */
-    private void startLoadOperation(boolean reload, int currentCacheState)
-        throws MethodIsBlockingException {
-      WipValueLoader.LoadPostprocessor<Getter<ScopeVariables>> processor =
-          new WipValueLoader.LoadPostprocessor<Getter<ScopeVariables>>() {
-        @Override
-        public Getter<ScopeVariables> process(
-            List<? extends PropertyDescriptorValue> propertyList, int currentCacheState) {
-          final List<JsVariable> properties = new ArrayList<JsVariable>(propertyList.size());
-
-          WipValueBuilder valueBuilder = valueLoader.getValueBuilder();
-          for (PropertyDescriptorValue property : propertyList) {
-            final String name = property.name();
-
-            ValueNameBuilder valueNameBuilder =
-                WipExpressionBuilder.createRootName(name, false);
-
-            JsVariable variable;
-            if (objectId == null) {
-              variable = valueBuilder.createVariable(property.value(), valueNameBuilder);
-            } else {
-              variable = valueBuilder.createObjectProperty(property, objectId, valueNameBuilder);
-            }
-            properties.add(variable);
-          }
-          final ScopeVariables scopeVariables = new ScopeVariables(properties, currentCacheState);
-          return new Getter<ScopeVariables>() {
-            @Override
-            ScopeVariables get() {
-              return scopeVariables;
-            }
-          };
-        }
-
-        @Override
-        public Getter<ScopeVariables> getEmptyResult() {
-          return EMPTY_SCOPE_VARIABLES_OPTIONAL;
-        }
-
-        @Override
-        public Getter<ScopeVariables> forException(Exception exception) {
-          return WipValueLoader.Getter.newFailure(exception);
-        }
-      };
-      // This is blocking.
-      valueLoader.loadPropertiesInFuture(objectId, processor, reload, currentCacheState,
-          propertiesRef);
-    }
-  }
-
-  private static class ObjectScopeImpl implements JsScope.ObjectBased {
-    private final JsValue jsValue;
-    private final JsScope.Type type;
-
-    ObjectScopeImpl(ScopeValue scopeData, JsScope.Type type, WipValueLoader valueLoader) {
-      jsValue = valueLoader.getValueBuilder().wrap(scopeData.object(), null);
-      this.type = type;
-    }
-
-    @Override public Type getType() {
-      return type;
-    }
-
-    @Override public Declarative asDeclarativeScope() {
-      return null;
-    }
-
-    @Override public ObjectBased asObjectBased() {
-      return this;
-    }
-
-    @Override public <R> R accept(Visitor<R> visitor) {
-      return visitor.visitObject(this);
-    }
-
-    @Override
-    public JsObject getScopeObject() throws MethodIsBlockingException {
-      JsObject jsObject = jsValue.asObject();
-      if (jsObject == null) {
-        throw new RuntimeException("Received scope object value is not an object");
-      }
-      return jsObject;
-    }
-  }
-
-  static final class GlobalEvaluateContext extends WipEvaluateContextBase<EvaluateData> {
-
-    GlobalEvaluateContext(WipValueLoader valueLoader) {
-      super(valueLoader);
-    }
-
-    @Override protected WipParamsWithResponse<EvaluateData> createRequestParams(String expression,
-        WipValueLoader destinationValueLoader) {
-      boolean doNotPauseOnExceptions = true;
-      return new EvaluateParams(expression, destinationValueLoader.getObjectGroupId(),
-          false, doNotPauseOnExceptions, null, false);
-    }
-
-    @Override protected RemoteObjectValue getRemoteObjectValue(EvaluateData data) {
-      return data.result();
-    }
-
-    @Override protected Boolean getWasThrown(EvaluateData data) {
-      return data.wasThrown();
-    }
-  }
-
-  private static final Map<ScopeValue.Type, JsScope.Type> WIP_TO_SDK_SCOPE_TYPE;
-  static {
-    WIP_TO_SDK_SCOPE_TYPE = new HashMap<ScopeValue.Type, JsScope.Type>();
-
-    WIP_TO_SDK_SCOPE_TYPE.put(ScopeValue.Type.GLOBAL, JsScope.Type.GLOBAL);
-    WIP_TO_SDK_SCOPE_TYPE.put(ScopeValue.Type.LOCAL, JsScope.Type.LOCAL);
-    WIP_TO_SDK_SCOPE_TYPE.put(ScopeValue.Type.WITH, JsScope.Type.WITH);
-    WIP_TO_SDK_SCOPE_TYPE.put(ScopeValue.Type.CLOSURE, JsScope.Type.CLOSURE);
-    WIP_TO_SDK_SCOPE_TYPE.put(ScopeValue.Type.CATCH, JsScope.Type.CATCH);
-
-    assert WIP_TO_SDK_SCOPE_TYPE.size() == ScopeValue.Type.values().length;
-  }
-
-  private static class ScopeVariables {
-    final List<JsVariable> variables;
-    final int cacheState;
-
-    ScopeVariables(List<JsVariable> variables, int cacheState) {
-      this.variables = variables;
-      this.cacheState = cacheState;
-    }
-  }
-
-  private static final Getter<ScopeVariables> EMPTY_SCOPE_VARIABLES_OPTIONAL =
-      new Getter<ScopeVariables>() {
-        private final ScopeVariables value =
-          new ScopeVariables(Collections.<JsVariable>emptyList(), Integer.MAX_VALUE);
-
-        @Override ScopeVariables get() {
-          return value;
-        }
-      };
-
-
-  private WipParams sdkStepToProtocolStep(StepAction stepAction) {
-    switch (stepAction) {
-    case CONTINUE:
-      return RESUME_PARAMS;
-    case IN:
-      return STEP_INTO_PARAMS;
-    case OUT:
-      return STEP_OUT_PARAMS;
-    case OVER:
-      return STEP_OVER_PARAMS;
-    default:
-      throw new RuntimeException();
-    }
-  }
-
-  private static final ResumeParams RESUME_PARAMS = new ResumeParams();
-  private static final StepIntoParams STEP_INTO_PARAMS = new StepIntoParams();
-  private static final StepOutParams STEP_OUT_PARAMS = new StepOutParams();
-  private static final StepOverParams STEP_OVER_PARAMS = new StepOverParams();
-}