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Groovy example source code file (Builder.java)

This example Groovy source code file (Builder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

builder, built, closure, closure, groovyobjectsupport, hashmap, hashmap, iterator, list, map, map, object, object, util

The Groovy Builder.java source code

/*
 * 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();

        for (Object o : methodMap.keySet()) {
            final Object key = o;
            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);
        }
    }
}

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