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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchdefinition.processing;
import com.yahoo.config.application.api.DeployLogger;
import com.yahoo.searchdefinition.RankProfileRegistry;
import com.yahoo.searchdefinition.Search;
import com.yahoo.searchdefinition.document.SDField;
import com.yahoo.vespa.indexinglanguage.ExpressionConverter;
import com.yahoo.vespa.indexinglanguage.ExpressionVisitor;
import com.yahoo.vespa.indexinglanguage.expressions.Expression;
import com.yahoo.vespa.indexinglanguage.expressions.InputExpression;
import com.yahoo.vespa.indexinglanguage.expressions.ScriptExpression;
import com.yahoo.vespa.indexinglanguage.expressions.StatementExpression;
import com.yahoo.vespa.model.container.search.QueryProfiles;
/**
* This processor modifies all indexing scripts so that they input the value of the owning field by default. It also
* ensures that all fields used as input exist.
*
* @author Simon Thoresen Hult
*/
public class IndexingInputs extends Processor {
public IndexingInputs(Search search, DeployLogger deployLogger, RankProfileRegistry rankProfileRegistry, QueryProfiles queryProfiles) {
super(search, deployLogger, rankProfileRegistry, queryProfiles);
}
@Override
public void process(boolean validate, boolean documentsOnly) {
for (SDField field : search.allConcreteFields()) {
ScriptExpression script = field.getIndexingScript();
if (script == null) continue;
String fieldName = field.getName();
script = (ScriptExpression)new DefaultToCurrentField(fieldName).convert(script);
script = (ScriptExpression)new EnsureInputExpression(fieldName).convert(script);
if (validate)
new VerifyInputExpression(search, field).visit(script);
field.setIndexingScript(script);
}
}
private static class DefaultToCurrentField extends ExpressionConverter {
final String fieldName;
DefaultToCurrentField(String fieldName) {
this.fieldName = fieldName;
}
@Override
protected boolean shouldConvert(Expression exp) {
return exp instanceof InputExpression && ((InputExpression)exp).getFieldName() == null;
}
@Override
protected Expression doConvert(Expression exp) {
return new InputExpression(fieldName);
}
}
private static class EnsureInputExpression extends ExpressionConverter {
final String fieldName;
EnsureInputExpression(String fieldName) {
this.fieldName = fieldName;
}
@Override
protected boolean shouldConvert(Expression exp) {
return exp instanceof StatementExpression;
}
@Override
protected Expression doConvert(Expression exp) {
if (exp.requiredInputType() != null) {
return new StatementExpression(new InputExpression(fieldName), exp);
} else {
return exp;
}
}
}
private class VerifyInputExpression extends ExpressionVisitor {
private final Search search;
private final SDField field;
public VerifyInputExpression(Search search, SDField field) {
this.search = search;
this.field = field;
}
@Override
protected void doVisit(Expression exp) {
if ( ! (exp instanceof InputExpression)) return;
String inputField = ((InputExpression)exp).getFieldName();
if (search.getField(inputField).hasFullIndexingDocprocRights()) return;
fail(search, field, "Indexing script refers to field '" + inputField + "' which does not exist " +
"in document type '" + search.getDocument().getName() + "', and is not a mutable attribute.");
}
}
}
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