com.anrisoftware.globalpom.textmatch.tokentemplate.DefaultTokensTemplate.java Source code

Introduction

Here is the source code for com.anrisoftware.globalpom.textmatch.tokentemplate.DefaultTokensTemplate.java

Source

/*
 * Copyright 2013-2014 Erwin Mller <erwin.mueller@deventm.org>
 *
 * This file is part of globalpomutils-core.
 *
 * globalpomutils-core is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * globalpomutils-core 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 Lesser General Public License
 * along with globalpomutils-core. If not, see <http://www.gnu.org/licenses/>.
 */
package com.anrisoftware.globalpom.textmatch.tokentemplate;

import java.io.Serializable;
import java.util.regex.Matcher;

import javax.inject.Inject;

import org.apache.commons.lang3.builder.ToStringBuilder;

import com.google.inject.assistedinject.Assisted;

/**
 * Replace search text with a replacement. The replacement will be surrounded by
 * a begin and end token. If the search text can not be found the replacement
 * will be appended.
 * 
 * @author Erwin Mueller, erwin.mueller@deventm.org
 * @since 2.0
 */
@SuppressWarnings("serial")
public class DefaultTokensTemplate implements Serializable {

    private static final String END_TOKEN = "end token";

    private static final String BEGIN_TOKEN = "begin token";

    private final String beginToken;

    private final String endToken;

    private final TokenTemplate template;

    private final String text;

    @Inject
    private DefaultTokensTemplateLogger log;

    private transient String replacement;

    /**
     * Sets the begin and end tokens, the template and the argument.
     * 
     * @param tokenMarker
     *            the {@link TokenMarker} holding the begin and end tokens.
     * 
     * @param template
     *            the {@link TokenTemplate} containing the search text and the
     *            replacement.
     * 
     * @param text
     *            the text in which to replace.
     */
    @Inject
    DefaultTokensTemplate(@Assisted TokenMarker tokenMarker, @Assisted TokenTemplate template,
            @Assisted String text) {
        this.beginToken = tokenMarker.getBeginToken();
        this.endToken = tokenMarker.getEndToken();
        this.template = template;
        this.text = text;
    }

    /**
     * Replace search text with a replacement.
     * 
     * @return this {@link DefaultTokensTemplate}.
     */
    public DefaultTokensTemplate replace() {
        Matcher matcher;
        matcher = template.toPattern(beginToken, endToken).matcher(text);
        boolean find = matcher.find();
        String replace = template.toReplace(beginToken, endToken);
        if (find) {
            replace(matcher, replace);
        } else if (template.isAppend()) {
            appendReplace(replace);
        } else {
            replacement = text;
        }
        return this;
    }

    private void appendReplace(String replace) {
        replacement = text + replace;
        log.appendArgument(this);
    }

    private void replace(Matcher matcher, String replace) {
        if (template.isEscape()) {
            replace = escapeReplace(replace);
        }
        replacement = matcher.replaceFirst(replace);
        log.replacedArgument(this);
    }

    private String escapeReplace(String replace) {
        return Matcher.quoteReplacement(replace);
    }

    /**
     * Returns the formatted text.
     * 
     * @return the text.
     */
    public String getText() {
        return replacement;
    }

    /**
     * Returns the token template.
     * 
     * @return the {@link TokenTemplate}.
     */
    public TokenTemplate getTemplate() {
        return template;
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this).append(template).append(BEGIN_TOKEN, beginToken)
                .append(END_TOKEN, endToken).toString();
    }
}