37 lines
994 B
Java
37 lines
994 B
Java
package jef.operations;
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import jef.Queryable;
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import jef.expressions.Expression;
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import jef.expressions.SelectExpression;
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import jef.expressions.selectable.DatabaseFunctionExpression;
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import java.io.Serializable;
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import java.util.List;
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public class CountOp<T extends Serializable> implements Operation<T> {
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private final Queryable<T> queryable;
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public CountOp(Queryable<T> queryable) {
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this.queryable = queryable;
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}
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@Override
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public String getTableAlias() {
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return String.valueOf((char) (queryable.getTableAlias().charAt(0) + (char) 1));
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}
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@Override
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public Expression getExpression() {
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return new SelectExpression(List.of(new DatabaseFunctionExpression("count(*)")), queryable.getExpression(), getTableAlias());
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}
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// @Override
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// public CountOp<T> clone() {
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// return new CountOp<>(queryable.clone());
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// }
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public long execute() {
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return 0;//TODO implement when sql execution part is ready
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}
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}
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