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/*
 * Copyright 2003-2009 the original author or authors.
 *
 * 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 groovy.xml;

import java.util.HashMap;
import java.util.Map;

/**
 * A helper class for MarkupBuilder.
 *
 * @author Paul King
 */
public class MarkupBuilderHelper {
    private MarkupBuilder builder;

    /**
     * @param builder the builder to delegate to
     */
    public MarkupBuilderHelper(MarkupBuilder builder) {
        this.builder = builder;
    }

    /**
     * Prints data in the body of the current tag, escaping XML entities.
     * For example: mkp.yield('5 < 7')
     *
     * @param value an Object whose toString() representation is to be printed
     */
    public void yield(Object value) {
        yield(value.toString());
    }

    /**
     * Prints data in the body of the current tag, escaping XML entities.
     * For example: mkp.yield('5 < 7')
     *
     * @param value text to print
     */
    public void yield(String value) {
        builder.yield(value, true);
    }

    /**
     * Print data in the body of the current tag.  Does not escape XML entities.
     * For example: mkp.yieldUnescaped('I am <i>happy</i>!').
     *
     * @param value an Object whose toString() representation is to be printed
     */
    public void yieldUnescaped(Object value) {
        yieldUnescaped(value.toString());
    }

    /**
     * Print data in the body of the current tag.  Does not escape XML entities.
     * For example: mkp.yieldUnescaped('I am <i>happy</i>!').
     *
     * @param value the text or markup to print.
     */
    public void yieldUnescaped(String value) {
        builder.yield(value, false);
    }

    /**
     * Produce a comment in the output.
     * 
     * mkp.comment 'string' is equivalent to
     * mkp.yieldUnescaped '<!-- string -->'.
     * To create an element with the name 'comment', you need
     * to supply empty attributes, e.g.:
     * 
     * comment('hello1')
     * 
     * or
     *      * mkp.comment('hello1')
     * 
     * will produce:
     *      * <!-- hello1 -->
     * 
     * while:
     *      * comment('hello2', [:])
     * 
     * will produce:
     *      * <comment>hello2</comment>
     * 
     *
     * @param value the text within the comment.
     */
    public void comment(String value) {
        yieldUnescaped("");
    }

    /**
     * Produce an XML declaration in the output.
     * For example:
     *      * mkp.xmlDeclaration(version:'1.0')
     * 
     *
     * @param args the attributes for the declaration
     */
    public void xmlDeclaration(Map args) {
        Map> map = new HashMap>();
        map.put("xml", args);
        pi(map);
    }

    /**
     * Produce an XML processing instruction in the output.
     * For example:
     *      * mkp.pi("xml-stylesheet":[href:"mystyle.css", type:"text/css"])
     * 
     *
     * @param args a map with a single entry whose key is the name of the
     *             processing instruction and whose value is the attributes
     *             for the processing instruction.
     */
    public void pi(Map> args) {
        builder.pi(args);
    }

}