com.google.devtools.javatools.transform.StringUtil.java Source code

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Here is the source code for com.google.devtools.javatools.transform.StringUtil.java

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/*
 * Copyright 2012 Google Inc. All Rights Reserved.
 *
 * 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.devtools.javatools.transform;

import com.google.common.collect.Lists;
import com.google.common.collect.Range;
import com.google.common.collect.RangeSet;

import java.util.Collections;
import java.util.List;

/**
 * String utilities.
 */
public class StringUtil {
    private StringUtil() {
    }

    /**
     * Strips the given ranges from {@code text}.
     */
    public static final String stripRanges(String text, RangeSet<Integer> rangesToRemove) {
        StringBuilder contentBuilder = new StringBuilder(text);
        // Delete the ranges.  Go from last to first to avoid having to
        // compute the offsets.
        List<Range<Integer>> ranges = Lists.newArrayList(rangesToRemove.asRanges());
        Collections.reverse(ranges);
        for (Range<Integer> range : ranges) {
            contentBuilder.delete(range.lowerEndpoint(), range.upperEndpoint());
        }
        return contentBuilder.toString();
    }

}