001 package org.codehaus.groovy.sandbox.markup; 002 /* 003 004 Copyright 2004 (C) John Wilson. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 047 import groovy.lang.Closure; 048 import groovy.lang.ParameterArray; 049 050 import java.util.Collections; 051 import java.util.HashMap; 052 import java.util.Map; 053 054 public class BaseMarkupBuilder extends Builder { 055 public BaseMarkupBuilder(final Map namespaceMethodMap) { 056 super(namespaceMethodMap); 057 } 058 059 public Object bind(final Closure root) { 060 return new Document(root, this.namespaceMethodMap); 061 } 062 063 private static class Document extends Built { 064 private Object out; 065 private final Map pendingNamespaces = new HashMap(); 066 private final Map namespaces = new HashMap(); 067 private String prefix = ""; 068 069 public Document(final Closure root, final Map namespaceMethodMap) { 070 super(root, namespaceMethodMap); 071 072 this.namespaces.put("xml", "http://www.w3.org/XML/1998/namespace"); // built in namespace 073 this.namespaces.put("mkp", "http://www.codehaus.org/Groovy/markup/keywords"); // pseudo namespace for markup keywords 074 } 075 076 /* (non-Javadoc) 077 * @see groovy.lang.GroovyObject#invokeMethod(java.lang.String, java.lang.Object) 078 */ 079 public Object invokeMethod(final String name, final Object args) { 080 final Object[] arguments = (Object[]) args; 081 Map attrs = Collections.EMPTY_MAP; 082 Object body = null; 083 084 085 // 086 // Sort the parameters out 087 // 088 for (int i = 0; i != arguments.length; i++) { 089 final Object arg = arguments[i]; 090 091 if (arg instanceof Map) { 092 attrs = (Map)arg; 093 } else if (arg instanceof Closure) { 094 final Closure c = ((Closure) arg); 095 096 c.setDelegate(this); 097 body = c.asWritable(); 098 } else { 099 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 ParameterArray(new Object[]{this, this.pendingNamespaces, this.namespaces, this.namespaceSpecificTags, prefix, attrs, body, this.out})); 125 } else { 126 return defaultTagClosure.call(new ParameterArray(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(); 145 } else { 146 super.setProperty(property, newValue); 147 } 148 } 149 } 150 }