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    1   package groovy.xml.streamingmarkupsupport;
    2   /*
    3
    4   Copyright 2004 (C) John Wilson. All Rights Reserved.
    5
    6   Redistribution and use of this software and associated documentation
    7   ("Software"), with or without modification, are permitted provided
    8   that the following conditions are met:
    9
    10  1. Redistributions of source code must retain copyright
    11     statements and notices.  Redistributions must also contain a
    12     copy of this document.
    13
    14  2. Redistributions in binary form must reproduce the
    15     above copyright notice, this list of conditions and the
    16     following disclaimer in the documentation and/or other
    17     materials provided with the distribution.
    18
    19  3. The name "groovy" must not be used to endorse or promote
    20     products derived from this Software without prior written
    21     permission of The Codehaus.  For written permission,
    22     please contact info@codehaus.org.
    23
    24  4. Products derived from this Software may not be called "groovy"
    25     nor may "groovy" appear in their names without prior written
    26     permission of The Codehaus. "groovy" is a registered
    27     trademark of The Codehaus.
    28
    29  5. Due credit should be given to The Codehaus -
    30     http://groovy.codehaus.org/
    31
    32  THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
    33  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
    34  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    35  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
    36  THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
    37  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    38  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    39  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    40  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    41  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    42  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    43  OF THE POSSIBILITY OF SUCH DAMAGE.
    44
    45  */
    46
    47  import groovy.lang.Closure;
    48  import groovy.lang.GroovyInterceptable;
    49
    50  import java.util.Collections;
    51  import java.util.HashMap;
    52  import java.util.Map;
    53
    54  public class BaseMarkupBuilder extends Builder {
    55  	public BaseMarkupBuilder(final Map namespaceMethodMap) {
    56  		super(namespaceMethodMap);
    57  	}
    58
    59  	public Object bind(final Closure root) {
    60  		return new Document(root, this.namespaceMethodMap);
    61  	}
    62
    63  	private static class Document extends Built implements GroovyInterceptable {
    64  		private Object out;
    65  		private final Map pendingNamespaces = new HashMap();
    66  		private final Map namespaces = new HashMap();
    67  		private String prefix = "";
    68
    69  		public Document(final Closure root, final Map namespaceMethodMap) {
    70  			super(root, namespaceMethodMap);
    71
    72  			this.namespaces.put("xml", "http://www.w3.org/XML/1998/namespace");				// built in namespace
    73  			this.namespaces.put("mkp", "http://www.codehaus.org/Groovy/markup/keywords");	// pseudo namespace for markup keywords
    74  		}
    75
    76  		/* (non-Javadoc)
    77  		 * @see groovy.lang.GroovyObject#invokeMethod(java.lang.String, java.lang.Object)
    78  		 */
    79  		public Object invokeMethod(final String name, final Object args) {
    80  			final Object[] arguments = (Object[]) args;
    81  			Map attrs = Collections.EMPTY_MAP;
    82  			Object body = null;
    83
    84
    85  			//
    86  			// Sort the parameters out
    87  			//
    88  			for (int i = 0; i != arguments.length; i++) {
    89  				final Object arg = arguments[i];
    90
    91  				if (arg instanceof Map) {
    92  					attrs = (Map)arg;
    93  				} else if (arg instanceof Closure) {
    94  					final Closure c = ((Closure) arg);
    95
    96  					c.setDelegate(this);
    97  					body = c.asWritable();
    98  				} else {
    99  					body = arg;
    100 				}
    101 			}
    102
    103 			//
    104 			// call the closure corresponding to the tag
    105 			//
    106 			final Object uri;
    107
    108 			if (this.pendingNamespaces.containsKey(this.prefix)) {
    109 				uri = this.pendingNamespaces.get(this.prefix);
    110 			} else if (this.namespaces.containsKey(this.prefix)) {
    111 				uri = this.namespaces.get(this.prefix);
    112 			} else {
    113 				uri = ":";
    114 			}
    115
    116 			final Object[] info  = (Object[])this.namespaceSpecificTags.get(uri);
    117 			final Map tagMap = (Map)info[2];
    118 			final Closure defaultTagClosure = (Closure)info[0];
    119
    120 			final String prefix = this.prefix;
    121 			this.prefix = "";
    122
    123 			if (tagMap.containsKey(name)) {
    124 				return ((Closure)tagMap.get(name)).call(new Object[]{this, this.pendingNamespaces, this.namespaces, this.namespaceSpecificTags, prefix, attrs, body, this.out});
    125 			} else {
    126 				return defaultTagClosure.call(new Object[]{name, this, this.pendingNamespaces, this.namespaces, this.namespaceSpecificTags, prefix, attrs, body, this.out});
    127 			}
    128 		}
    129
    130 		/* (non-Javadoc)
    131 		 * @see groovy.lang.GroovyObject#getProperty(java.lang.String)
    132 		 */
    133 		public Object getProperty(final String property) {
    134 			this.prefix = property;
    135 			return this;
    136 		}
    137
    138 		/* (non-Javadoc)
    139 		 * @see groovy.lang.GroovyObject#setProperty(java.lang.String, java.lang.Object)
    140 		 */
    141 		public void setProperty(String property, Object newValue) {
    142 			if ("trigger".equals(property)) {
    143 				this.out = newValue;
    144 				this.root.call(this);
    145 			} else {
    146 				super.setProperty(property, newValue);
    147 			}
    148 		}
    149 	}
    150 }