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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;
import com.yahoo.document.DataType;
import com.yahoo.document.Document;
import com.yahoo.document.Field;
import com.yahoo.document.FieldPath;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.vespa.indexinglanguage.expressions.Expression;
import com.yahoo.vespa.indexinglanguage.expressions.VerificationException;
/**
* @author Simon Thoresen Hult
*/
public class SimpleDocumentAdapter implements DocumentAdapter {
private final Document input;
private final Document output;
public SimpleDocumentAdapter(Document input) {
this(input, new Document(input.getDataType(), input.getId()));
}
public SimpleDocumentAdapter(Document input, Document output) {
this.input = input;
this.output = output;
}
@Override
public Document getFullOutput() {
return output;
}
@Override
public Document getUpdatableOutput() {
return output;
}
@Override
public DataType getInputType(Expression exp, String fieldName) {
try {
return input.getDataType().buildFieldPath(fieldName).getResultingDataType();
} catch (IllegalArgumentException e) {
throw new VerificationException(exp, "Input field '" + fieldName + "' not found");
}
}
@Override
public FieldValue getInputValue(String fieldName) {
try {
return input.getRecursiveValue(fieldName);
} catch (IllegalArgumentException e) {
return null;
}
}
@Override
public FieldValue getInputValue(FieldPath fieldPath) {
try {
return input.getRecursiveValue(fieldPath);
} catch (IllegalArgumentException e) {
return null;
}
}
@Override
public void tryOutputType(Expression exp, String fieldName, DataType valueType) {
Field field = output.getDataType().getField(fieldName);
if (field == null) {
throw new VerificationException(exp, "Field '" + fieldName + "' not found");
}
DataType fieldType = field.getDataType();
if (!fieldType.isAssignableFrom(valueType)) {
throw new VerificationException(exp, "Can not assign " + valueType.getName() + " to field '" +
fieldName + "' which is " + fieldType.getName());
}
}
@Override
public SimpleDocumentAdapter setOutputValue(Expression exp, String fieldName, FieldValue fieldValue) {
Field field = output.getField(fieldName);
if (field == null) {
throw new IllegalArgumentException("Field '" + fieldName + "' not found in document type '" +
output.getDataType().getName());
}
output.setFieldValue(field, fieldValue);
return this;
}
}
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