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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.indexinglanguage.expressions;
import com.yahoo.document.DataType;
import com.yahoo.document.FieldPath;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.language.Language;
import com.yahoo.language.Linguistics;
import com.yahoo.language.detect.Detection;
import java.util.HashMap;
import java.util.Map;
/**
* @author Simon Thoresen Hult
*/
public class ExecutionContext implements FieldTypeAdapter, FieldValueAdapter, Cloneable {
private final Map<String, FieldValue> variables = new HashMap<>();
private final FieldValueAdapter adapter;
private FieldValue value;
private Language language;
public ExecutionContext() {
this(null);
}
public ExecutionContext(FieldValueAdapter adapter) {
this.adapter = adapter;
this.language = Language.UNKNOWN;
}
public ExecutionContext execute(Expression expression) {
if (expression != null)
expression.execute(this);
return this;
}
/**
* Returns whether this is for a complete execution of all statements of a script,
* or a partial execution of only the statements accessing the available data.
*/
public boolean isComplete() { return adapter == null ? false : adapter.isComplete(); }
@Override
public DataType getInputType(Expression exp, String fieldName) {
return adapter.getInputType(exp, fieldName);
}
@Override
public FieldValue getInputValue(String fieldName) {
if (adapter == null) {
throw new IllegalStateException("Can not get field '" + fieldName + "' because adapter is null");
}
return adapter.getInputValue(fieldName);
}
@Override
public FieldValue getInputValue(FieldPath fieldPath) {
if (adapter == null) {
throw new IllegalStateException("Can not get field '" + fieldPath + "' because adapter is null");
}
return adapter.getInputValue(fieldPath);
}
@Override
public void tryOutputType(Expression exp, String fieldName, DataType valueType) {
adapter.tryOutputType(exp, fieldName, valueType);
}
@Override
public ExecutionContext setOutputValue(Expression exp, String fieldName, FieldValue fieldValue) {
if (adapter == null)
throw new IllegalStateException("Can not set field '" + fieldName + "' because adapter is null");
adapter.setOutputValue(exp, fieldName, fieldValue);
return this;
}
public FieldValueAdapter getAdapter() {
return adapter;
}
public FieldValue getVariable(String name) {
return variables.get(name);
}
public ExecutionContext setVariable(String name, FieldValue value) {
variables.put(name, value);
return this;
}
public Language getLanguage() {
return language;
}
public ExecutionContext setLanguage(Language language) {
language.getClass();
this.language = language;
return this;
}
public Language resolveLanguage(Linguistics linguistics) {
if (language != null && language != Language.UNKNOWN) {
return language;
}
if (linguistics == null) {
return Language.ENGLISH;
}
Detection detection = linguistics.getDetector().detect(String.valueOf(value), null);
if (detection == null) {
return Language.ENGLISH;
}
Language detected = detection.getLanguage();
if (detected == Language.UNKNOWN) {
return Language.ENGLISH;
}
return detected;
}
public FieldValue getValue() {
return value;
}
public ExecutionContext setValue(FieldValue value) {
this.value = value;
return this;
}
public ExecutionContext clear() {
variables.clear();
value = null;
return this;
}
void fillVariableTypes(VerificationContext vctx) {
for (var entry : variables.entrySet()) {
vctx.setVariable(entry.getKey(), entry.getValue().getDataType());
}
}
}
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