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/*
* Copyright (C) 2013 DroidDriver committers
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.android.droiddriver.util;
/**
* Static helper methods for manipulating strings.
*/
public class Strings {
public static String charSequenceToString(CharSequence input) {
return input == null ? null : input.toString();
}
public static ToStringHelper toStringHelper(Object self) {
return new ToStringHelper(self.getClass().getSimpleName());
}
public static final class ToStringHelper {
private final StringBuilder builder;
private boolean needsSeparator = false;
/**
* Use {@link #toStringHelper(Object)} to create an instance.
*/
private ToStringHelper(String className) {
this.builder = new StringBuilder(32).append(className).append('{');
}
public ToStringHelper addValue(Object value) {
maybeAppendSeparator().append(value);
return this;
}
public ToStringHelper add(String name, Object value) {
maybeAppendSeparator().append(name).append('=').append(value);
return this;
}
@Override
public String toString() {
return builder.append('}').toString();
}
private StringBuilder maybeAppendSeparator() {
if (needsSeparator) {
return builder.append(", ");
} else {
needsSeparator = true;
return builder;
}
}
}
}
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