/*
* Copyright (C) 2008 Steve Ratcliffe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* Author: Steve Ratcliffe
* Create date: 15-Nov-2008
*/
package uk.me.parabola.mkgmap.osmstyle.actions;
import java.util.List;
import uk.me.parabola.mkgmap.reader.osm.Element;
import uk.me.parabola.mkgmap.reader.osm.TagDict;
/**
* Add a tag, optionally changing it if it already exists. The value that
* the tag is set to can have replacements from the current tags.
*
* @author Steve Ratcliffe
*/
public class AddTagAction extends ValueBuildedAction {
private final boolean modify;
private final String tag;
private final short tagKey;
// The tags used to build the value.
private Element valueTags;
/**
* Create an action to add the given tag with a value.
* If the modify flag is true, then we change the tag if it
* already exists.
*/
public AddTagAction(String tag, String value, boolean modify) {
this.modify = modify;
this.tag = tag;
this.tagKey = TagDict.getInstance().xlate(tag);
add(value);
}
public boolean perform(Element el) {
if (!modify){
String tv = el.getTag(tagKey);
if (tv != null)
return false;
}
Element tags = valueTags!=null? valueTags: el;
for (ValueBuilder value : getValueBuilder()) {
String newval = value.build(tags, el);
if (newval != null) {
el.addTag(tagKey, newval);
return true;
}
}
return false;
}
public void setValueTags(Element valueTags) {
this.valueTags = valueTags;
}
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(modify ? "set " : "add ");
sb.append(tag);
sb.append("=");
List<ValueBuilder> values = getValueBuilder();
for (int i = 0; i < values.size(); i++) {
sb.append(values.get(i));
if (i < values.size() - 1)
sb.append(" | ");
}
sb.append(';');
return sb.toString();
}
}