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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.predicate;
import java.util.ArrayList;
import java.util.List;
/**
* @author Simon Thoresen Hult
*/
public class SimplePredicates {
public static Predicate newPredicate() {
return new Predicate() {
@Override
protected void appendTo(StringBuilder out) {
out.append("<anon>");
}
};
}
public static Predicate newString(String str) {
return new StringNode(str);
}
public static List<Predicate> newStrings(String... arr) {
List<Predicate> ret = new ArrayList<>(arr.length);
for (String str : arr) {
ret.add(newString(str));
}
return ret;
}
private static class StringNode extends Predicate {
final String str;
StringNode(String str) {
this.str = str;
}
@Override
public int hashCode() {
return str.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof StringNode)) {
return false;
}
StringNode rhs = (StringNode)obj;
if (!str.equals(rhs.str)) {
return false;
}
return true;
}
@Override
protected void appendTo(StringBuilder out) {
out.append(str);
}
}
}
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