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SOLR-11947: Rollback inadvertent code change during documentation updates.

This commit is contained in:
Joel Bernstein 2018-03-26 14:48:33 -04:00
parent 1ed4e226ac
commit e69c614cf6
1 changed files with 20 additions and 22 deletions
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42
solr/solrj/src/java/org/apache/solr/client/solrj/io/eval/FieldValueEvaluator.java
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@ -29,27 +29,21 @@ import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
public class FieldValueEvaluator extends SourceEvaluator {
private static final long serialVersionUID = 1L;
private String fieldName;
private boolean literal;
public FieldValueEvaluator(String fieldName) {
if(fieldName.startsWith("\"") && fieldName.endsWith("\"") && fieldName.length() > 1){
if(fieldName.startsWith("'") && fieldName.endsWith("'") && fieldName.length() > 1){
fieldName = fieldName.substring(1, fieldName.length() - 1);
literal = true;
}
this.fieldName = fieldName;
}
@Override
public Object evaluate(Tuple tuple) throws IOException {
if(literal) {
return fieldName;
}
this.fieldName = fieldName;
}
@Override
public Object evaluate(Tuple tuple) throws IOException {
Object value = tuple.get(fieldName);
// This is somewhat radical.
// Here, we allow for the use of the context to provide alternative values
// when they are not available in the provided tuple. This means that all
@ -57,14 +51,14 @@ public class FieldValueEvaluator extends SourceEvaluator {
// can even evaluate over fields from both of them in the same evaluation
if(null == value && null != getStreamContext()){
value = getStreamContext().getLets().get(fieldName);
// If what's contained in the context is itself an evaluator then
// we need to evaluate it
if(value instanceof StreamEvaluator){
value = ((StreamEvaluator)value).evaluate(tuple);
}
}
// if we have an array then convert to an ArrayList
// if we have an iterable that is not a list then convert to ArrayList
// lists are good to go
@ -90,9 +84,13 @@ public class FieldValueEvaluator extends SourceEvaluator {
}
}
if(value == null) {
return fieldName;
}
return value;
}
@Override
public StreamExpressionParameter toExpression(StreamFactory factory) throws IOException {
return new StreamExpressionValue(fieldName);
@ -101,9 +99,9 @@ public class FieldValueEvaluator extends SourceEvaluator {
@Override
public Explanation toExplanation(StreamFactory factory) throws IOException {
return new Explanation(nodeId.toString())
.withExpressionType(ExpressionType.EVALUATOR)
.withImplementingClass(getClass().getName())
.withExpression(toExpression(factory).toString());
.withExpressionType(ExpressionType.EVALUATOR)
.withImplementingClass(getClass().getName())
.withExpression(toExpression(factory).toString());
}
}
}