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Groovy: A powerful, dynamic language for the JVM

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/*
 * Copyright 2003-2007 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.streamingmarkupsupport;

import groovy.lang.Closure;
import groovy.lang.GroovyObjectSupport;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public abstract class Builder extends GroovyObjectSupport {
	protected final Map namespaceMethodMap = new HashMap();
	
	public Builder(final Map namespaceMethodMap) {
	final Iterator keyIterator = namespaceMethodMap.keySet().iterator();
		
		while (keyIterator.hasNext()) {
		final Object key = keyIterator.next();
		final List value = (List)namespaceMethodMap.get(key);
		final Closure dg = ((Closure)value.get(1)).asWritable();
		
			this.namespaceMethodMap.put(key, new Object[]{value.get(0), dg, fettleMethodMap(dg, (Map)value.get(2))});
		}
	}
	
	private static Map fettleMethodMap(final Closure defaultGenerator, final Map methodMap) {
	final Map newMethodMap = new HashMap();
	final Iterator keyIterator = methodMap.keySet().iterator();
		
		while (keyIterator.hasNext()) {
		final Object key = keyIterator.next();
		final Object value = methodMap.get(key);
		
			if ((value instanceof Closure)) {
				newMethodMap.put(key, value);
			} else {
				newMethodMap.put(key, defaultGenerator.curry((Object[])value));
			}
		}
		
		return newMethodMap;
	}
	
	public abstract Object bind(Closure root);
	
	protected abstract static class Built extends GroovyObjectSupport {
	protected final Closure root;
	protected final Map namespaceSpecificTags = new HashMap();
		
		public Built(final Closure root, final Map namespaceTagMap) {
			this.namespaceSpecificTags.putAll(namespaceTagMap);
		
			this.root = (Closure)root.clone();
			
			this.root.setDelegate(this);
		}
	}
}