/**
*
* 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.collect.ImmutableList;
import com.googlecode.charts4j.collect.Lists;
/**
* Class for building axis labels parameter string for the Google Chart API.
*
* @author Julien Chastang (julien.c.chastang at gmail dot com)
*/
final class AxisLabelsParameter extends AbstractParameter {
/** The Google Chart API axis labels parameter. */
private static final String URL_PARAMETER_KEY = "chxl";
/** The axis labels. */
private final List<AxisLabels> axisLabels = Lists.newLinkedList();
/**
* Add an axis labels.
*
* @param index
* the index
* @param labels
* the labels
*/
void addAxisLabels(final int index, final ImmutableList<? extends String> labels) {
axisLabels.add(new AxisLabels(index, labels));
}
/**
* {@inheritDoc}
*/
@Override
public String getKey() {
return URL_PARAMETER_KEY;
}
/**
* {@inheritDoc}
*/
@Override
public String getValue() {
final StringBuilder sb = new StringBuilder();
int cnt = 0;
for (AxisLabels aLabels : axisLabels) {
sb.append(cnt++ > 0 ? "|" : "").append(aLabels);
}
return !axisLabels.isEmpty() ? sb.toString() : "";
}
/**
* A container to hold axis labels.
*/
private static final class AxisLabels {
/** The index. */
private final int index;
/** The labels. */
private final ImmutableList<String> labels;
/**
* Instantiates this container.
*
* @param index
* the index
* @param labels
* the labels
*/
private AxisLabels(final int index, final ImmutableList<? extends String> labels) {
this.index = index;
this.labels = Lists.copyOf(labels);
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
if (labels.isEmpty()) {
return "";
} else {
final StringBuilder sb = new StringBuilder(index + ":|");
int cnt = 0;
for (String label : labels) {
final String l = ParameterUtil.utf8Encode(label);
sb.append(cnt++ > 0 ? "|" : "").append(l);
}
return sb.toString();
}
}
}
}