Create ScriptHeaderService

Create a new ScriptHeaderService, a handler of a new ScriptHeader plugin
type.

The purpose of this new framework is to allow flexible addition of
header text to scripts, specified by language.

Author: hinerm

src/main/java/org/scijava/script/AbstractScriptHeader.java

@@ -0,0 +1,60 @@
+/*
+ * #%L
+ * SciJava Common shared library for SciJava software.
+ * %%
+ * Copyright (C) 2009 - 2014 Board of Regents of the University of
+ * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
+ * Institute of Molecular Cell Biology and Genetics.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package org.scijava.script;
+
+import org.scijava.plugin.AbstractHandlerPlugin;
+
+/**
+ * Abstract superclass for {@link ScriptHeader} implementations.
+ *
+ * @author Mark Hiner
+ */
+public abstract class AbstractScriptHeader extends
+	AbstractHandlerPlugin<ScriptLanguage> implements ScriptHeader
+{
+
+	// -- Typed methods --
+
+	@Override
+	public boolean supports(final ScriptLanguage language) {
+		return language != null && language.getClass() == handledType();
+	}
+
+	@Override
+	public Class<ScriptLanguage> getType() {
+		return ScriptLanguage.class;
+	}
+
+	// -- Internal methods --
+
+	protected abstract Class<? extends ScriptLanguage> handledType();
+}

src/main/java/org/scijava/script/DefaultScriptHeaderService.java

@@ -0,0 +1,78 @@
+/*
+ * #%L
+ * SciJava Common shared library for SciJava software.
+ * %%
+ * Copyright (C) 2009 - 2014 Board of Regents of the University of
+ * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
+ * Institute of Molecular Cell Biology and Genetics.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package org.scijava.script;
+
+import org.scijava.plugin.AbstractHandlerService;
+import org.scijava.plugin.Plugin;
+import org.scijava.service.Service;
+
+/**
+ * Default {@link ScriptHeaderService} implementation.
+ *
+ * @author Mark Hiner
+ */
+@Plugin(type = Service.class)
+public class DefaultScriptHeaderService extends
+	AbstractHandlerService<ScriptLanguage, ScriptHeader> implements
+	ScriptHeaderService
+{
+
+	// -- ScriptHeaderService methods --
+
+	@Override
+	public String getHeader(final ScriptLanguage language) {
+		String header = null;
+		for (final ScriptHeader scriptHeader : getInstances()) {
+			if (scriptHeader.supports(language)) {
+				if (header == null) {
+					header = "";
+				}
+				header += scriptHeader.getHeader() + "\n";
+			}
+		}
+
+		return header;
+	}
+
+	// -- HandlerService methods --
+
+	@Override
+	public Class<ScriptHeader> getPluginType() {
+		return ScriptHeader.class;
+	}
+
+	@Override
+	public Class<ScriptLanguage> getType() {
+		return ScriptLanguage.class;
+	}
+
+}

src/main/java/org/scijava/script/ScriptHeader.java

@@ -0,0 +1,48 @@
+/*
+ * #%L
+ * SciJava Common shared library for SciJava software.
+ * %%
+ * Copyright (C) 2009 - 2014 Board of Regents of the University of
+ * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
+ * Institute of Molecular Cell Biology and Genetics.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package org.scijava.script;
+
+import org.scijava.plugin.HandlerPlugin;
+
+/**
+ * Represents one or more canned lines intended to go at the top of scripts of a
+ * given language. Typically this includes useful import statements.
+ *
+ * @author Mark Hiner
+ */
+public interface ScriptHeader extends HandlerPlugin<ScriptLanguage> {
+
+	/**
+	 * @return The header text for scripts of the supported language.
+	 */
+	String getHeader();
+}

src/main/java/org/scijava/script/ScriptHeaderService.java

@@ -0,0 +1,62 @@
+/*
+ * #%L
+ * SciJava Common shared library for SciJava software.
+ * %%
+ * Copyright (C) 2009 - 2014 Board of Regents of the University of
+ * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
+ * Institute of Molecular Cell Biology and Genetics.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package org.scijava.script;
+
+import org.scijava.plugin.HandlerService;
+
+/**
+ * Interface for a {@link HandlerService} capable of mapping
+ * {@link ScriptLanguage}s to {@link ScriptHeader}s.
+ * <p>
+ * NB: although individual/highest priority handlers can be queried as normal
+ * via a {@code HandlerService}, the
+ * {@link #getHeader(ScriptLanguage)} method will combine the headers
+ * for all available {@code ScriptHeader}s for a given {@code ScriptLanguage}.
+ * </p>
+ *
+ * @author Mark Hiner
+ */
+public interface ScriptHeaderService extends
+	HandlerService<ScriptLanguage, ScriptHeader>
+{
+
+	/**
+	 * Searches for all {@link ScriptHeader}s capable of handling the given
+	 * {@link ScriptLanguage} and combines the result of their
+	 * {@link ScriptHeader#getHeader()} output to a single string.
+	 *
+	 * @param language - Language to look up
+	 * @return The combined header text to insert at the top of a script, or null
+	 *         if no {@link ScriptHeader}s were found.
+	 */
+	String getHeader(final ScriptLanguage language);
+}

src/test/java/org/scijava/ContextCreationTest.java

@@ -90,6 +90,7 @@ public void testFull() {
 				org.scijava.platform.DefaultPlatformService.class,
 				org.scijava.plugin.DefaultPluginService.class,
 				org.scijava.prefs.DefaultPrefService.class,
+				org.scijava.script.DefaultScriptHeaderService.class,
 				org.scijava.text.DefaultTextService.class,
 				org.scijava.thread.DefaultThreadService.class,
 				org.scijava.tool.DefaultToolService.class,