[processor/transform] Fix context inferrer so it takes into consideration global conditions (#39463)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
Fix the context inferrer to also take into consideration the global OTTL
`conditions` configuration.
For that, it uses the new option `ottl.WithContextInferenceConditions`
recently added to the `ParserCollection.ParseStataments`
(#39465).

<!-- Issue number (e.g. #1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Fixes
#39455

<!--Describe what testing was performed and which tests were added.-->
#### Testing
Unit tests

<!--Please delete paragraphs that you did not use before submitting.-->

Author: edmocosta

.chloggen/fix-global-conditions-ctx-inference.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: transformprocessor
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix the context inferrer to also take into consideration the global OTTL conditions configuration.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [39455]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user, api]

processor/transformprocessor/config.go

@@ -49,10 +49,9 @@ type Config struct {
 
 // Unmarshal is used internally by mapstructure to parse the transformprocessor configuration (Config),
 // adding support to structured and flat configuration styles.
-// When the flat configuration style is used, each statement becomes a new common.ContextStatements
+// When the flat configuration style is used, all statements are grouped into a common.ContextStatements
 // object, with empty [common.ContextStatements.Context] value.
 // On the other hand, structured configurations are parsed following the mapstructure Config format.
-// Mixed configuration styles are also supported.
 //
 // Example of flat configuration:
 //

processor/transformprocessor/internal/common/logs.go

@@ -116,5 +116,5 @@ func (lpc *LogParserCollection) ParseContextStatements(contextStatements Context
 	if contextStatements.Context != "" {
 		return pc.ParseStatementsWithContext(string(contextStatements.Context), contextStatements, true)
 	}
-	return pc.ParseStatements(contextStatements)
+	return pc.ParseStatements(contextStatements, ottl.WithContextInferenceConditions(contextStatements.Conditions))
 }

processor/transformprocessor/internal/common/metrics.go

@@ -257,5 +257,5 @@ func (mpc *MetricParserCollection) ParseContextStatements(contextStatements Cont
 	if contextStatements.Context != "" {
 		return pc.ParseStatementsWithContext(string(contextStatements.Context), contextStatements, true)
 	}
-	return pc.ParseStatements(contextStatements)
+	return pc.ParseStatements(contextStatements, ottl.WithContextInferenceConditions(contextStatements.Conditions))
 }

processor/transformprocessor/internal/common/traces.go

@@ -185,5 +185,5 @@ func (tpc *TraceParserCollection) ParseContextStatements(contextStatements Conte
 	if contextStatements.Context != "" {
 		return pc.ParseStatementsWithContext(string(contextStatements.Context), contextStatements, true)
 	}
-	return pc.ParseStatements(contextStatements)
+	return pc.ParseStatements(contextStatements, ottl.WithContextInferenceConditions(contextStatements.Conditions))
 }

processor/transformprocessor/internal/logs/processor_test.go

@@ -1151,6 +1151,56 @@ func Test_ProcessLogs_CacheAccess(t *testing.T) {
 	}
 }
 
+func Test_ProcessLogs_InferredContextFromConditions(t *testing.T) {
+	tests := []struct {
+		name              string
+		contextStatements []common.ContextStatements
+		want              func(td plog.Logs)
+	}{
+		{
+			name: "inferring from statements",
+			contextStatements: []common.ContextStatements{
+				{
+					Conditions: []string{`resource.attributes["test"] == nil`},
+					Statements: []string{`set(log.attributes["test"], "pass")`},
+				},
+			},
+			want: func(td plog.Logs) {
+				td.ResourceLogs().At(0).ScopeLogs().At(0).LogRecords().At(0).Attributes().PutStr("test", "pass")
+				td.ResourceLogs().At(0).ScopeLogs().At(0).LogRecords().At(1).Attributes().PutStr("test", "pass")
+			},
+		},
+		{
+			name: "inferring from conditions",
+			contextStatements: []common.ContextStatements{
+				{
+					Conditions: []string{`log.attributes["test"] == nil`},
+					Statements: []string{`set(resource.attributes["test"], "pass")`},
+				},
+			},
+			want: func(td plog.Logs) {
+				td.ResourceLogs().At(0).Resource().Attributes().PutStr("test", "pass")
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			td := constructLogs()
+			processor, err := NewProcessor(tt.contextStatements, ottl.IgnoreError, false, componenttest.NewNopTelemetrySettings())
+			assert.NoError(t, err)
+
+			_, err = processor.ProcessLogs(context.Background(), td)
+			assert.NoError(t, err)
+
+			exTd := constructLogs()
+			tt.want(exTd)
+
+			assert.Equal(t, exTd, td)
+		})
+	}
+}
+
 func Test_NewProcessor_ConditionsParse(t *testing.T) {
 	type testCase struct {
 		name          string

processor/transformprocessor/internal/metrics/processor_test.go

@@ -1880,6 +1880,63 @@ func Test_ProcessMetrics_CacheAccess(t *testing.T) {
 	}
 }
 
+func Test_ProcessMetrics_InferredContextFromConditions(t *testing.T) {
+	tests := []struct {
+		name              string
+		contextStatements []common.ContextStatements
+		want              func(td pmetric.Metrics)
+	}{
+		{
+			name: "inferring from statements",
+			contextStatements: []common.ContextStatements{
+				{
+					Conditions: []string{`resource.attributes["test"] == nil`},
+					Statements: []string{`set(metric.name, Concat([metric.name, "pass"], "-"))`},
+				},
+			},
+			want: func(td pmetric.Metrics) {
+				for _, v := range td.ResourceMetrics().All() {
+					for _, m := range v.ScopeMetrics().All() {
+						for _, mm := range m.Metrics().All() {
+							mm.SetName(mm.Name() + "-pass")
+						}
+					}
+				}
+			},
+		},
+		{
+			name: "inferring from conditions",
+			contextStatements: []common.ContextStatements{
+				{
+					Conditions: []string{`metric.name != nil`},
+					Statements: []string{`set(resource.attributes["test"], "pass")`},
+				},
+			},
+			want: func(td pmetric.Metrics) {
+				for _, v := range td.ResourceMetrics().All() {
+					v.Resource().Attributes().PutStr("test", "pass")
+				}
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			td := constructMetrics()
+			processor, err := NewProcessor(tt.contextStatements, ottl.IgnoreError, componenttest.NewNopTelemetrySettings())
+			assert.NoError(t, err)
+
+			_, err = processor.ProcessMetrics(context.Background(), td)
+			assert.NoError(t, err)
+
+			exTd := constructMetrics()
+			tt.want(exTd)
+
+			assert.Equal(t, exTd, td)
+		})
+	}
+}
+
 func Test_NewProcessor_ConditionsParse(t *testing.T) {
 	type testCase struct {
 		name          string

processor/transformprocessor/internal/traces/processor_test.go

@@ -1267,6 +1267,63 @@ func Test_ProcessTraces_CacheAccess(t *testing.T) {
 	}
 }
 
+func Test_ProcessTraces_InferredContextFromConditions(t *testing.T) {
+	tests := []struct {
+		name              string
+		contextStatements []common.ContextStatements
+		want              func(td ptrace.Traces)
+	}{
+		{
+			name: "inferring from statements",
+			contextStatements: []common.ContextStatements{
+				{
+					Conditions: []string{`resource.attributes["test"] == nil`},
+					Statements: []string{`set(span.name, Concat([span.name, "pass"], "-"))`},
+				},
+			},
+			want: func(td ptrace.Traces) {
+				for _, v := range td.ResourceSpans().All() {
+					for _, m := range v.ScopeSpans().All() {
+						for _, mm := range m.Spans().All() {
+							mm.SetName(mm.Name() + "-pass")
+						}
+					}
+				}
+			},
+		},
+		{
+			name: "inferring from conditions",
+			contextStatements: []common.ContextStatements{
+				{
+					Conditions: []string{`span.name != nil`},
+					Statements: []string{`set(resource.attributes["test"], "pass")`},
+				},
+			},
+			want: func(td ptrace.Traces) {
+				for _, v := range td.ResourceSpans().All() {
+					v.Resource().Attributes().PutStr("test", "pass")
+				}
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			td := constructTraces()
+			processor, err := NewProcessor(tt.contextStatements, ottl.IgnoreError, componenttest.NewNopTelemetrySettings())
+			assert.NoError(t, err)
+
+			_, err = processor.ProcessTraces(context.Background(), td)
+			assert.NoError(t, err)
+
+			exTd := constructTraces()
+			tt.want(exTd)
+
+			assert.Equal(t, exTd, td)
+		})
+	}
+}
+
 func Test_NewProcessor_ConditionsParse(t *testing.T) {
 	type testCase struct {
 		name          string