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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.query;
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;
import java.util.Objects;
import java.util.stream.Collectors;
/**
* An item matching a uri field.
* This is syntactic sugar for a phrase with anchor items.
*
* @author bratseth
*/
public class UriItem extends PhraseItem {
// Fields here are auxiliary information not needed for semantics but used preserve a nice canonical form
private boolean startAnchorDefault = false;
private boolean endAnchorDefault = false;
private String sourceString;
public UriItem() {
super();
}
public UriItem(String indexName) {
super(indexName);
}
/**
* Adds a start anchor as the *current* first item.
* This does not enforce that the items stays at the start if further items are added.
* */
public void addStartAnchorItem() {
addItem(0, MarkerWordItem.createStartOfHost(getIndexName()));
}
/**
* Adds an end anchor as the *current* last item.
* This does not enforce that the items stays at the end if further items are added.
*/
public void addEndAnchorItem() {
addItem(MarkerWordItem.createEndOfHost(getIndexName()));
}
/** Returns whether the first item of this is a start anchor */
public boolean hasStartAnchor() {
return getItem(0) instanceof MarkerWordItem
&& ((MarkerWordItem)getItem(0)).isStartAnchor();
}
/** Returns whether the last item of this is an end anchor */
public boolean hasEndAnchor() {
return getItem(getItemCount()-1) instanceof MarkerWordItem
&& ((MarkerWordItem)getItem(getItemCount()-1)).isEndAnchor();
}
public boolean isStartAnchorDefault() { return startAnchorDefault; }
public void setStartAnchorDefault(boolean startAnchorDefault) { this.startAnchorDefault = startAnchorDefault; }
public boolean isEndAnchorDefault() { return endAnchorDefault; }
public void setEndAnchorDefault(boolean endAnchorDefault) { this.endAnchorDefault = endAnchorDefault; }
public void setSourceString(String sourceString) { this.sourceString = sourceString; }
/**
* Returns the canonical form of the tokens of this: Either the source string, or if none
* each token except the start and end anchor separated by space
*/
public String getArgumentString() {
if (sourceString != null) return sourceString;
List<Item> items = new ArrayList<>(items());
if (hasStartAnchor())
items.remove(0);
if (hasEndAnchor())
items.remove(items.size() - 1);
return items.stream().map(item -> ((WordItem)item).getWord()).collect(Collectors.joining(" "));
}
@Override
public boolean equals(Object o) {
if ( ! super.equals(o)) return false;
var other = (UriItem)o;
if ( this.startAnchorDefault != other.startAnchorDefault) return false;
if ( this.endAnchorDefault != other.endAnchorDefault) return false;
if ( ! Objects.equals(this.sourceString, other.sourceString)) return false;
return true;
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), startAnchorDefault, endAnchorDefault, sourceString);
}
}
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