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feature: improvements in order by and joins clauses
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35 changes: 26 additions & 9 deletions
35
src/main/java/io/github/andersoncrocha/jpqlquerybuilder/operations/OrderBy.java
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Original file line number | Diff line number | Diff line change |
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@@ -1,35 +1,52 @@ | ||
package io.github.andersoncrocha.jpqlquerybuilder.operations; | ||
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import java.util.Objects; | ||
import java.util.Set; | ||
import io.github.andersoncrocha.jpqlquerybuilder.operations.types.SortDirection; | ||
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import java.util.HashMap; | ||
import java.util.Map; | ||
import java.util.function.Function; | ||
import java.util.stream.Collectors; | ||
import java.util.stream.Stream; | ||
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public class OrderBy implements QueryOperation { | ||
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private final Set<String> fields; | ||
private final Map<String, SortDirection> fields; | ||
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public OrderBy(String fields) { | ||
this.fields = this.prepareFields(fields); | ||
} | ||
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public OrderBy(String field, SortDirection sortDirection) { | ||
this.fields = new HashMap<>(); | ||
this.fields.put(field, sortDirection); | ||
} | ||
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public void addOrderBy(String fields) { | ||
Objects.requireNonNull(fields, "addOrderBy() cannot be called before orderBy() method"); | ||
Set<String> preparedFields = this.prepareFields(fields); | ||
this.fields.addAll(preparedFields); | ||
Map<String, SortDirection> preparedFields = this.prepareFields(fields); | ||
this.fields.putAll(preparedFields); | ||
} | ||
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public void addOrderBy(String field, SortDirection sortDirection) { | ||
this.fields.put(field, sortDirection); | ||
} | ||
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@Override | ||
public String getOperation() { | ||
String joinedFields = String.join(", ", this.fields); | ||
String joinedFields = this.fields.entrySet() | ||
.stream() | ||
.map(entry -> { | ||
String field = entry.getKey(); | ||
SortDirection sortDirection = entry.getValue(); | ||
return String.format("%s %s", field, sortDirection.name()); | ||
}).collect(Collectors.joining(", ")); | ||
return String.format("ORDER BY %s ", joinedFields); | ||
} | ||
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private Set<String> prepareFields(String fields) { | ||
private Map<String, SortDirection> prepareFields(String fields) { | ||
String[] separatedFields = fields.split(","); | ||
return Stream.of(separatedFields) | ||
.map(String::trim) | ||
.collect(Collectors.toSet()); | ||
.collect(Collectors.toMap(Function.identity(), field -> SortDirection.ASC)); | ||
} | ||
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} |
12 changes: 12 additions & 0 deletions
12
src/main/java/io/github/andersoncrocha/jpqlquerybuilder/operations/types/SortDirection.java
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@@ -0,0 +1,12 @@ | ||
package io.github.andersoncrocha.jpqlquerybuilder.operations.types; | ||
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public enum SortDirection { | ||
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ASC, | ||
DESC; | ||
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public static SortDirection isAscending(boolean isAscending) { | ||
return isAscending ? ASC : DESC; | ||
} | ||
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} |