io.knotx.splitter.impl.HtmlFragmentSplitter.java Source code

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Here is the source code for io.knotx.splitter.impl.HtmlFragmentSplitter.java

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/*
 * Copyright (C) 2016 Cognifide Limited
 *
 * 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 io.knotx.splitter.impl;

import io.knotx.dataobjects.Fragment;
import io.knotx.fragments.FragmentConstants;
import com.google.common.collect.Lists;
import java.util.Arrays;
import java.util.List;
import java.util.regex.MatchResult;
import java.util.regex.Matcher;

class HtmlFragmentSplitter implements FragmentSplitter {

    @Override
    public List<Fragment> split(String html) {
        List<Fragment> fragments = Lists.newLinkedList();
        if (html.matches(FragmentConstants.ANY_SNIPPET_PATTERN)) {
            Matcher matcher = FragmentConstants.SNIPPET_PATTERN.matcher(html);
            int idx = 0;
            while (matcher.find()) {
                MatchResult matchResult = matcher.toMatchResult();
                if (idx < matchResult.start()) {
                    fragments.add(toRaw(html, idx, matchResult.start()));
                }
                fragments.add(toSnippet(
                        matchResult.group(1).intern().split(FragmentConstants.FRAGMENT_IDENTIFIERS_SEPARATOR), html,
                        matchResult.start(), matchResult.end()));
                idx = matchResult.end();
            }
            if (idx < html.length()) {
                fragments.add(toRaw(html, idx, html.length()));
            }
        } else {
            fragments.add(toRaw(html, 0, html.length()));
        }
        return fragments;
    }

    private Fragment toRaw(String html, int startIdx, int endIdx) {
        return Fragment.raw(html.substring(startIdx, endIdx));
    }

    private Fragment toSnippet(String[] ids, String html, int startIdx, int endIdx) {
        return Fragment.snippet(Arrays.asList(ids), html.substring(startIdx, endIdx));
    }
}