Revision 44750 trunk/org.gvsig.desktop/org.gvsig.desktop.library/org.gvsig.expressionevaluator/org.gvsig.expressionevaluator.lib/org.gvsig.expressionevaluator.lib.impl/src/main/java/org/gvsig/expressionevaluator/impl/function/programming/CreateFnFunction.java
| CreateFnFunction.java | ||
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import org.gvsig.tools.script.Script; |
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import org.gvsig.tools.script.ScriptManager; |
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@SuppressWarnings("UseSpecificCatch")
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public class CreateFnFunction extends AbstractFunction {
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public static final String NAME = "CREATE_FUNCTION"; |
| ... | ... | |
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"They have the form:\n" + |
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"\n" + |
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"<pre>\n" + |
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"CREATE FUNCTION getCRS (crs) AS 'org.gvsig.fmap.crs.CRSFactory', 'getCRS' LANGUAGE 'java'\n" +
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"CREATE FUNCTION parseInt(value) AS 'java.lang.Integer', 'parseInt' LANGUAGE 'java'\n" +
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"</pre>\n" + |
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"\n" + |
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"Defines the \"getCRS\" function that receives a single parameter, and links it to the method\n" +
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"static 'getCRS' of class 'org.gvsig.fmap.crs.CRSFactory',\n" +
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"Defines the \"parseInt\" function that receives a single parameter, and links it to the method\n" +
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"static 'parseInt' of the class 'java.lang.Integer',\n" +
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"\n" + |
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"<b> Functions defined in an external script. </b>\n" + |
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"\n" + |
| ... | ... | |
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"They have the form:\n" + |
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"\n" + |
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"<pre>\n" + |
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"CREATE FUNCTION getCRS (crs) AS 'scripts / crs.py', 'getCRS' LANGUAGE 'python'\n" +
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"CREATE FUNCTION getCRS(crs) AS 'crs.py', 'getCRS' LANGUAGE 'script'\n" +
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"</pre>\n" + |
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"\n" + |
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"What defines a \"getCRS\" function that is implemented in the python module\n" + |
| ... | ... | |
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@Override |
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public boolean isHidden() {
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return false; |
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return false;
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} |
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@Override |
| ... | ... | |
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} |
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@Override |
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public boolean allowArgNames() {
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return true; |
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} |
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@Override |
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public Object call(Interpreter interpreter, Object[] args) throws Exception {
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throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
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} |
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private static final int FUNCTION_NAME = 0; |
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private static final int PARAMETERS = 1; |
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private static final int BODY = 2; |
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private static final int SCRIPT_PATH = 3; |
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private static final int SCRIPT_FUNCTION = 4; |
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private static final int LANGUAGE = 5; |
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private static final int TYPE_USER_FUNCTION = 0; |
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private static final int TYPE_JAVA_FUNCTION = 1; |
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private static final int TYPE_SCRIPT_FUNCTION = 2; |
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@Override |
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public Object call(Interpreter interpreter, Codes args) throws Exception {
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if( !(interpreter.getSymbolTable() instanceof MutableSymbolTable) ) {
|
| ... | ... | |
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} |
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MutableSymbolTable symbolTable = (MutableSymbolTable) interpreter.getSymbolTable(); |
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String name = (String) getObject(interpreter, args, "FUNCTION_NAME"); |
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List<String> argNames = (List<String>) getObject(interpreter, args, "PARAMETERS"); |
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Code body = args.get("BODY");
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String script_path = (String) getObject(interpreter, args, "SCRIPT_PATH"); |
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String script_function = (String) getObject(interpreter, args, "SCRIPT_FUNCTION"); |
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String language = (String) getObject(interpreter, args, "LANGUAGE"); |
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Function fn; |
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if( body!=null ) {
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fn = new UserFunction(name, argNames, body); |
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symbolTable.addFunction(fn); |
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return fn; |
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} |
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if( StringUtils.isBlank(script_path) || StringUtils.isBlank(script_function) ) {
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throw new ExpressionRuntimeException("boydy and, script path or script function, are empty.");
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} |
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String name = (String) getObject(interpreter, args, FUNCTION_NAME); |
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List<String> argNames = (List<String>) getObject(interpreter, args, PARAMETERS); |
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Code body = args.get(BODY); |
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String script_path = (String) getObject(interpreter, args, SCRIPT_PATH); |
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String script_function = (String) getObject(interpreter, args, SCRIPT_FUNCTION); |
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String language = (String) getObject(interpreter, args, LANGUAGE); |
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if( StringUtils.isBlank(language) ) {
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language = "script"; |
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} |
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switch(language.toLowerCase()) {
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case "script": |
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fn = new ExternalFunction(name, script_path, script_function); |
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symbolTable.addFunction(fn); |
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return fn; |
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case "java": |
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fn = new JavaFunction(name, script_path, script_function); |
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symbolTable.addFunction(fn); |
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return fn; |
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int type = TYPE_USER_FUNCTION; |
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if( !StringUtils.isBlank(script_path) || !StringUtils.isBlank(script_function)) {
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switch(language.toLowerCase()) {
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case "script": |
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type = TYPE_SCRIPT_FUNCTION; |
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break; |
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case "java": |
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type = TYPE_JAVA_FUNCTION; |
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break; |
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default: |
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throw new ExpressionRuntimeException("Unsupported language '"+language+".");
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} |
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} |
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throw new ExpressionRuntimeException("Unsupported language '"+language+".");
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Function fn = null; |
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switch(type) {
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case TYPE_USER_FUNCTION: |
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fn = new UserFunction(name, argNames, body); |
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symbolTable.addFunction(fn); |
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break; |
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case TYPE_JAVA_FUNCTION: |
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if( StringUtils.isBlank(script_path) || StringUtils.isBlank(script_function)) {
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throw new ExpressionRuntimeException("Requiered classname and methodname.");
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} |
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fn = new JavaFunction(name, script_path, script_function); |
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symbolTable.addFunction(fn); |
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break; |
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case TYPE_SCRIPT_FUNCTION: |
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if( StringUtils.isBlank(script_path) || StringUtils.isBlank(script_function)) {
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throw new ExpressionRuntimeException("Requiered module and function name.");
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} |
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fn = new ExternalFunction(name, script_path, script_function); |
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symbolTable.addFunction(fn); |
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break; |
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} |
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return fn; |
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} |
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private static class UserFunction extends AbstractFunction {
|
| ... | ... | |
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} |
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|
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@Override |
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public boolean allowArgNames() {
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return true; |
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} |
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@Override |
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public Object call(Interpreter interpreter, Object[] args) throws Exception {
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Object value; |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
| ... | ... | |
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@Override |
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public Object call(Interpreter interpreter, Object[] args) throws Exception {
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List<ClassLoader> loaders = ExpressionEvaluatorLocator.getManager().getClassLoaders(); |
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Class<?> theClass = null; |
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for (ClassLoader loader : loaders) {
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try {
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theClass = loader.loadClass(this.fullClassName); |
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if( theClass!=null ) {
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break; |
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} |
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} catch(Throwable th) {
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// Do nothing skip |
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} |
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} |
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if( theClass == null ) {
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throw new ExpressionRuntimeException("Can't localte the class '"+this.fullClassName+"'.");
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} |
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Class[] parameterTypes = new Class[args.length]; |
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for (int i = 0; i < args.length; i++) {
|
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if( args[i]==null ) {
|
| ... | ... | |
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parameterTypes[i] = args[i].getClass(); |
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} |
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} |
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Class<?> theClass = Class.forName(this.fullClassName); |
|
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Method method = theClass.getMethod(this.methodName, parameterTypes); |
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Object value = method.invoke(null, args); |
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return value; |
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