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46
47 package org.codehaus.groovy.control;
48
49 import groovy.lang.GroovyClassLoader;
50
51 /***
52 * A base class for data structures that can collect messages and errors
53 * during processing.
54 *
55 * @author <a href="mailto:cpoirier@dreaming.org">Chris Poirier</a>
56 * @version $Id: ProcessingUnit.java,v 1.18 2005/11/13 16:42:11 blackdrag Exp $
57 */
58
59 public abstract class ProcessingUnit {
60
61 /***
62 * The current phase
63 */
64 protected int phase;
65 /***
66 * Set true if phase is finished
67 */
68 protected boolean phaseComplete;
69
70 /***
71 * Configuration and other settings that control processing
72 */
73 protected CompilerConfiguration configuration;
74
75 /***
76 * The ClassLoader to use during processing
77 */
78 protected GroovyClassLoader classLoader;
79
80 /***
81 * a helper to share errors and report them
82 */
83 protected ErrorCollector errorCollector;
84
85
86 /***
87 * Initialize the ProcessingUnit to the empty state.
88 */
89
90 public ProcessingUnit(CompilerConfiguration configuration, GroovyClassLoader classLoader, ErrorCollector er) {
91
92 this.phase = Phases.INITIALIZATION;
93 this.setClassLoader(classLoader);
94 configure((configuration == null ? new CompilerConfiguration() : configuration));
95 if (er==null) er = new ErrorCollector(getConfiguration());
96 this.errorCollector = er;
97 }
98
99
100 /***
101 * Reconfigures the ProcessingUnit.
102 */
103 public void configure(CompilerConfiguration configuration) {
104 this.configuration = configuration;
105 }
106
107
108 public CompilerConfiguration getConfiguration() {
109 return configuration;
110 }
111
112 public void setConfiguration(CompilerConfiguration configuration) {
113 this.configuration = configuration;
114 }
115
116 /***
117 * Returns the class loader in use by this ProcessingUnit.
118 */
119
120 public GroovyClassLoader getClassLoader() {
121 return classLoader;
122 }
123
124
125 /***
126 * Sets the class loader for use by this ProcessingUnit.
127 */
128
129 public void setClassLoader(GroovyClassLoader loader) {
130 ClassLoader parent = Thread.currentThread().getContextClassLoader();
131 if (parent == null) parent = ProcessingUnit.class.getClassLoader();
132 this.classLoader = (loader == null ? new GroovyClassLoader(parent, configuration) : loader);
133 }
134
135
136 /***
137 * Returns the current phase.
138 */
139
140 public int getPhase() {
141 return this.phase;
142 }
143
144
145 /***
146 * Returns the description for the current phase.
147 */
148
149 public String getPhaseDescription() {
150 return Phases.getDescription(this.phase);
151 }
152
153 public ErrorCollector getErrorCollector() {
154 return errorCollector;
155 }
156
157
158
159
160
161 /***
162 * Marks the current phase complete and processes any
163 * errors.
164 */
165
166 public void completePhase() throws CompilationFailedException {
167 errorCollector.failIfErrors();
168 phaseComplete = true;
169 }
170
171
172 /***
173 * A synonym for <code>gotoPhase( phase + 1 )</code>.
174 */
175 public void nextPhase() throws CompilationFailedException {
176 gotoPhase(this.phase + 1);
177 }
178
179
180 /***
181 * Wraps up any pending operations for the current phase
182 * and switches to the next phase.
183 */
184 public void gotoPhase(int phase) throws CompilationFailedException {
185 if (!this.phaseComplete) {
186 completePhase();
187 }
188
189 this.phase = phase;
190 this.phaseComplete = false;
191 }
192
193 }
194
195
196
197