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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.document;
import java.util.Objects;
import java.util.Optional;
/**
* The TestAndSetCondition class represents a test and set condition.
* A test and set condition is an (optional) string representing a
* document selection (cf. document selection language), which is used
* to match a document for test and set. If #isPresent evaluates to false,
* the condition is not present and matches any document.
*
* @author Vegard Sjonfjell
*/
public class TestAndSetCondition {
public static final TestAndSetCondition NOT_PRESENT_CONDITION = new TestAndSetCondition();
private final String conditionStr;
public TestAndSetCondition() {
this("");
}
public TestAndSetCondition(String conditionStr) {
this.conditionStr = conditionStr;
}
public String getSelection() { return conditionStr; }
public boolean isPresent() { return !conditionStr.isEmpty(); }
/**
* Maps and optional test and set condition string to a TestAndSetCondition.
* If the condition string is not present, a "not present" condition is returned
* @param conditionString test and set condition string (document selection)
* @return a TestAndSetCondition representing the condition string or a "not present" condition
*/
public static TestAndSetCondition fromConditionString(Optional<String> conditionString) {
return conditionString
.map(TestAndSetCondition::new)
.orElse(TestAndSetCondition.NOT_PRESENT_CONDITION);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
TestAndSetCondition that = (TestAndSetCondition) o;
return conditionStr.equals(that.conditionStr);
}
@Override
public int hashCode() {
return Objects.hash(conditionStr);
}
@Override
public String toString() {
StringBuilder string = new StringBuilder();
string.append("condition '");
string.append(conditionStr);
string.append("'");
return string.toString();
}
}
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