GameObjectText.java

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/*
 * Gridarta MMORPG map editor for Crossfire, Daimonin and similar games.
 * Copyright (C) 2000-2015 The Gridarta Developers.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package net.sf.gridarta.model.baseobject;

import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import net.sf.gridarta.utils.StringUtils;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class GameObjectText implements Serializable {

    private static final long serialVersionUID = 1L;

    @NotNull
    private final StringBuilder objectText = new StringBuilder();

    private final Map<String, String> attributeCache = new HashMap<>();

    public GameObjectText() {
    }

    public GameObjectText(@NotNull final GameObjectText gameObjectText) {
        objectText.append(gameObjectText.objectText);
    }

    private void clearAttributeCache() {
        attributeCache.clear();
    }

    @Nullable
    public String getAttributeValue(@NotNull final String attributeName) {
        final String result;
        if (attributeCache.containsKey(attributeName)) {
            result = attributeCache.get(attributeName);
        } else {
            result = getAttributeValueInt(attributeName);
            attributeCache.put(attributeName, result);
        }
        return result;
    }

    @Nullable
    private String getAttributeValueInt(@NotNull final String attributeName) {
        final String attr2 = attributeName.trim() + ' ';
        String result = null;
        for (final String line : StringUtils.PATTERN_END_OF_LINE.split(objectText.toString(), 0)) {
            if (line.startsWith(attr2)) {
                result = line.substring(attr2.length());
                break;
            }
        }
        return result;
    }

    @NotNull
    public String getObjectText() {
        return objectText.toString();
    }

    public boolean hasObjectText() {
        return objectText.length() > 0;
    }

    public boolean addObjectText(@NotNull final String line, @NotNull final AbstractBaseObject<?, ?, ?, ?> baseObject) {
        if (line.isEmpty()) {
            return false;
        }
        baseObject.beginGameObjectChange();
        try {
            objectText.append(line);
            if (!line.endsWith("\n")) {
                objectText.append('\n');
            }
        } finally {
            baseObject.endGameObjectChange();
        }
        clearAttributeCache();
        return true;
    }

    public boolean setObjectText(@NotNull final String objectText, @NotNull final AbstractBaseObject<?, ?, ?, ?> baseObject) {
        final String oldObjectText = this.objectText.toString();
        if (oldObjectText.length() == objectText.length()) {
            final String oldSortedObjectText = StringUtils.sortLines(oldObjectText);
            final String newSortedObjectText = StringUtils.sortLines(objectText);
            if (oldSortedObjectText.equals(newSortedObjectText)) {
                return false;
            }
        }

        baseObject.beginGameObjectChange();
        try {
            this.objectText.setLength(0);
            this.objectText.append(objectText);
            if (!objectText.isEmpty() && !objectText.endsWith("\n")) {
                this.objectText.append('\n');
            }
        } finally {
            baseObject.endGameObjectChange();
        }
        clearAttributeCache();
        return true;
    }

    @Override
    public int hashCode() {
        return objectText.toString().hashCode();
    }

    @Override
    public boolean equals(@Nullable final Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj == null || obj.getClass() != getClass()) {
            return false;
        }
        final GameObjectText gameObjectText = (GameObjectText) obj;
        return gameObjectText.objectText.toString().equals(objectText.toString());
    }

    public boolean removeAttribute(@NotNull final String attributeName, @NotNull final AbstractBaseObject<?, ?, ?, ?> baseObject) {
        final String attributeNameWithSpace = attributeName.trim() + " ";        // attributeName must be followed by space

        final StringBuilder sb = new StringBuilder();
        for (final String line : StringUtils.PATTERN_END_OF_LINE.split(objectText.toString(), 0)) {
            if (!line.isEmpty() && !line.startsWith(attributeNameWithSpace)) {
                sb.append(line).append('\n');
            }
        }
        return setObjectText(sb.toString(), baseObject);
    }

    public boolean setAttributeValue(@NotNull final String attributeName, final boolean sameAsInArchetype, @NotNull final String value, @NotNull final AbstractBaseObject<?, ?, ?, ?> baseObject) {
        if (value.isEmpty()) {
            return removeAttribute(attributeName, baseObject);
        }

        final String attributeNameWithSpace = attributeName.trim() + " ";
        boolean exists = false;
        final StringBuilder result = new StringBuilder();
        for (final String line : StringUtils.PATTERN_END_OF_LINE.split(objectText.toString(), 0)) {
            if (line.isEmpty()) {
                // skip empty lines that occur due to split on empty object texts.
            } else if (!line.startsWith(attributeNameWithSpace)) {
                result.append(line).append('\n');
            } else {
                exists = true;
                if (!sameAsInArchetype) {
                    result.append(attributeNameWithSpace).append(value).append('\n');
                }
            }
        }
        if (!exists && !sameAsInArchetype) {
            result.append(attributeNameWithSpace).append(value).append('\n');
        }
        return setObjectText(result.toString(), baseObject);
    }

    @NotNull
    public Collection<String> getAttributeKeys() {
        final Collection<String> keys = new HashSet<>();
        for (final String line : StringUtils.PATTERN_END_OF_LINE.split(objectText.toString(), 0)) {
            final int index = line.indexOf(' ');
            if (index != -1) {
                keys.add(line.substring(0, index));
            }
        }
        return keys;
    }

}