com.igormaznitsa.mindmap.model.Extra.java Source code

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Here is the source code for com.igormaznitsa.mindmap.model.Extra.java

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/*
 * Copyright 2015 Igor Maznitsa.
 *
 * 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.igormaznitsa.mindmap.model;

import java.io.IOException;
import java.io.Serializable;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import org.apache.commons.lang.StringEscapeUtils;

public abstract class Extra<T> implements Serializable, Constants, Cloneable {

    private static final long serialVersionUID = 2547528075256486018L;

    public enum ExtraType {

        FILE, LINK, NOTE, TOPIC;

        @Nullable
        public String preprocessString(@Nullable final String str) {
            String result = null;
            if (str != null) {
                switch (this) {
                case FILE:
                case LINK: {
                    try {
                        result = str.trim();
                        URI.create(result);
                    } catch (Exception ex) {
                        result = null;
                    }
                }
                    break;
                case TOPIC: {
                    result = str.trim();
                }
                    break;
                default:
                    result = str;
                    break;
                }
            }
            return result;
        }

        @Nonnull
        public Extra<?> parseLoaded(@Nonnull final String text) throws URISyntaxException {
            final String preprocessed = StringEscapeUtils.unescapeHtml(text);
            switch (this) {
            case FILE:
                return new ExtraFile(preprocessed);
            case LINK:
                return new ExtraLink(preprocessed);
            case NOTE:
                return new ExtraNote(preprocessed);
            case TOPIC:
                return new ExtraTopic(preprocessed);
            default:
                throw new Error("Unexpected value [" + this.name() + ']'); //NOI18N
            }
        }
    }

    @Nonnull
    public abstract T getValue();

    @Nonnull
    public abstract ExtraType getType();

    @Nonnull
    public abstract String getAsString();

    @Nonnull
    public abstract String provideAsStringForSave();

    public final void write(@Nonnull final Writer out) throws IOException {
        out.append("- ").append(getType().name()).append(NEXT_LINE); //NOI18N
        out.append(ModelUtils.makePreBlock(provideAsStringForSave()));
    }

}