/**
*
* The MIT License
*
* Copyright (c) 2011 the original author or authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.googlecode.charts4j.parameters;
import java.util.List;
import com.googlecode.charts4j.Color;
import com.googlecode.charts4j.collect.ImmutableList;
import com.googlecode.charts4j.collect.Lists;
/**
* Class for building chart colors parameter string for the Google Chart API.
*
* @author Julien Chastang (julien.c.chastang at gmail dot com)
*/
final class ColorsParameter extends AbstractParameter {
/** The Google Chart API colors parameter. */
private static final String URL_PARAMETER_KEY = "chco";
/** The colors. */
private final List<List<Color>> colors = Lists.newLinkedList();
/**
* Add the colors. This is a 2D data structure because in some cases
* (e.g. individually colored bars in a bar chart) there can be more
* than one color in a data series. In most cases, however, the inner
* list, is only going to be 1 long.
*
* @param colors
* the colors
*/
void addColors(final ImmutableList<? extends ImmutableList<? extends Color>> colors) {
for (ImmutableList<? extends Color> listOfColors : colors) {
final List<Color> l = Lists.newLinkedList();
l.addAll(listOfColors);
this.colors.add(l);
}
}
/**
* {@inheritDoc}
*/
@Override
public String getKey() {
return URL_PARAMETER_KEY;
}
/**
* {@inheritDoc}
*/
@Override
public String getValue() {
final StringBuilder sb = new StringBuilder();
int cnt = 0;
for (List<Color> l : colors) {
sb.append(cnt++ > 0 ? "," : "");
int i = 0;
for (Color color : l) {
sb.append(i++ > 0 ? "|" : "").append(color);
}
}
return !colors.isEmpty() ? sb.toString() : "";
}
}