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// ValueReference.cs
//
// Author:
// Lluis Sanchez Gual <lluis@novell.com>
//
// Copyright (c) 2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
using System;
using System.Collections.Generic;
using Mono.Debugging.Client;
using Mono.Debugging.Backend;
using DC = Mono.Debugging.Client;
namespace Mono.Debugging.Evaluation
{
public abstract class ValueReference: RemoteFrameObject, IObjectValueSource, IObjectSource
{
EvaluationContext ctx;
EvaluationOptions originalOptions;
public ValueReference (EvaluationContext ctx)
{
this.ctx = ctx;
originalOptions = ctx.Options;
}
public virtual object ObjectValue {
get {
object ob = Value;
if (ctx.Adapter.IsNull (Context, ob))
return null;
else if (ctx.Adapter.IsPrimitive (Context, ob))
return ctx.Adapter.TargetObjectToObject (ctx, ob);
else
return ob;
}
}
public abstract object Value { get; set; }
public abstract string Name { get; }
public abstract object Type { get; }
public abstract ObjectValueFlags Flags { get; }
// For class members, the type declaring the member (null otherwise)
public virtual object DeclaringType {
get { return null; }
}
public EvaluationContext Context
{
get {
return ctx;
}
}
public EvaluationContext GetContext (EvaluationOptions options)
{
return ctx.WithOptions (options);
}
public ObjectValue CreateObjectValue (bool withTimeout)
{
return CreateObjectValue (withTimeout, Context.Options);
}
public ObjectValue CreateObjectValue (bool withTimeout, EvaluationOptions options)
{
if (!CanEvaluate (options))
return DC.ObjectValue.CreateImplicitNotSupported (this, new ObjectPath (Name), ctx.Adapter.GetTypeName (GetContext (options), Type), Flags);
if (withTimeout) {
return ctx.Adapter.CreateObjectValueAsync (Name, Flags, delegate {
return CreateObjectValue (options);
});
} else
return CreateObjectValue (options);
}
public ObjectValue CreateObjectValue (EvaluationOptions options)
{
if (!CanEvaluate (options))
return DC.ObjectValue.CreateImplicitNotSupported (this, new ObjectPath (Name), ctx.Adapter.GetTypeName (GetContext (options), Type), Flags);
Connect ();
try {
return OnCreateObjectValue (options);
} catch (ImplicitEvaluationDisabledException) {
return DC.ObjectValue.CreateImplicitNotSupported (this, new ObjectPath (Name), ctx.Adapter.GetTypeName (GetContext (options), Type), Flags);
} catch (NotSupportedExpressionException ex) {
return DC.ObjectValue.CreateNotSupported (this, new ObjectPath (Name), ex.Message, ctx.Adapter.GetTypeName (GetContext (options), Type), Flags);
} catch (EvaluatorException ex) {
return DC.ObjectValue.CreateError (this, new ObjectPath (Name), "", ex.Message, Flags);
} catch (Exception ex) {
ctx.WriteDebuggerError (ex);
return DC.ObjectValue.CreateUnknown (Name);
}
}
protected virtual bool CanEvaluate (EvaluationOptions options)
{
return true;
}
protected virtual ObjectValue OnCreateObjectValue (EvaluationOptions options)
{
string name = Name;
if (string.IsNullOrEmpty (name))
name = "?";
EvaluationContext newCtx = GetContext (options);
EvaluationContext oldCtx = Context;
object val = null;
try {
// Note: The Value property implementation may make use of the EvaluationOptions,
// so we need to override our context temporarily to do the evaluation.
ctx = newCtx;
val = Value;
} finally {
ctx = oldCtx;
}
if (val != null)
return newCtx.Adapter.CreateObjectValue (newCtx, this, new ObjectPath (name), val, Flags);
else
return Mono.Debugging.Client.ObjectValue.CreateNullObject (this, name, newCtx.Adapter.GetTypeName (newCtx, Type), Flags);
}
ObjectValue IObjectValueSource.GetValue (ObjectPath path, EvaluationOptions options)
{
return CreateObjectValue (true, options);
}
EvaluationResult IObjectValueSource.SetValue (ObjectPath path, string value, EvaluationOptions options)
{
try {
ctx.WaitRuntimeInvokes ();
EvaluationContext cctx = GetContext (options);
cctx.Options.AllowMethodEvaluation = true;
cctx.Options.AllowTargetInvoke = true;
ValueReference vref = cctx.Evaluator.Evaluate (cctx, value, Type);
object newValue = cctx.Adapter.Convert (cctx, vref.Value, Type);
Value = newValue;
} catch (Exception ex) {
ctx.WriteDebuggerError (ex);
ctx.WriteDebuggerOutput ("Value assignment failed: {0}: {1}\n", ex.GetType (), ex.Message);
}
try {
return ctx.Evaluator.TargetObjectToExpression (ctx, Value);
} catch (Exception ex) {
ctx.WriteDebuggerError (ex);
ctx.WriteDebuggerOutput ("Value assignment failed: {0}: {1}\n", ex.GetType (), ex.Message);
}
return null;
}
object IObjectValueSource.GetRawValue (ObjectPath path, EvaluationOptions options)
{
return ctx.Adapter.ToRawValue (GetContext (options), this, Value);
}
void IObjectValueSource.SetRawValue (ObjectPath path, object value, EvaluationOptions options)
{
Value = ctx.Adapter.FromRawValue (GetContext (options), value);
}
bool IObjectValueSource.HasChildren (ObjectPath path, EvaluationOptions options)
{
return HasChildren (path, options);
}
ObjectValue[] IObjectValueSource.GetChildren (ObjectPath path, int index, int count, EvaluationOptions options)
{
return GetChildren (path, index, count, options);
}
public virtual string CallToString ()
{
return ctx.Adapter.CallToString (ctx, Value);
}
public virtual bool HasChildren (ObjectPath path, EvaluationOptions options)
{
try {
return ctx.Adapter.ObjectValueHasChildren (GetChildrenContext (options), this, Value);
} catch {
return false;
}
}
public virtual ObjectValue[] GetChildren (ObjectPath path, int index, int count, EvaluationOptions options)
{
try {
return ctx.Adapter.GetObjectValueChildren (GetChildrenContext (options), this, Value, index, count);
} catch (Exception ex) {
return new ObjectValue [] { Mono.Debugging.Client.ObjectValue.CreateFatalError ("", ex.Message, ObjectValueFlags.ReadOnly) };
}
}
public virtual IEnumerable<ValueReference> GetChildReferences (EvaluationOptions options)
{
try {
object val = Value;
if (ctx.Adapter.IsClassInstance (Context, val))
return ctx.Adapter.GetMembersSorted (GetChildrenContext (options), this, Type, val);
} catch {
// Ignore
}
return new ValueReference [0];
}
public IObjectSource ParentSource { get; internal set; }
EvaluationContext GetChildrenContext (EvaluationOptions options)
{
EvaluationContext newCtx = ctx.Clone ();
if (options != null)
newCtx.Options = options;
newCtx.Options.EvaluationTimeout = originalOptions.MemberEvaluationTimeout;
return newCtx;
}
public virtual ValueReference GetChild (ObjectPath vpath, EvaluationOptions options)
{
if (vpath.Length == 0)
return this;
ValueReference val = GetChild (vpath[0], options);
if (val != null)
return val.GetChild (vpath.GetSubpath (1), options);
else
return null;
}
public virtual ValueReference GetChild (string name, EvaluationOptions options)
{
object obj = Value;
if (obj == null)
return null;
if (name[0] == '[' && ctx.Adapter.IsArray (Context, obj)) {
// Parse the array indices
string[] sinds = name.Substring (1, name.Length - 2).Split (',');
int[] indices = new int [sinds.Length];
for (int n=0; n<sinds.Length; n++)
indices [n] = int.Parse (sinds [n]);
return new ArrayValueReference (ctx, obj, indices);
}
if (ctx.Adapter.IsClassInstance (Context, obj)) {
ValueReference val = ctx.Adapter.GetMember (GetChildrenContext (options), this, obj, name);
return val;
}
return null;
}
}
}
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