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package org.apache.commons.jexl.util.introspection; |
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import org.apache.commons.jexl.util.ArrayIterator; |
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import org.apache.commons.jexl.util.EnumerationIterator; |
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import org.apache.commons.jexl.util.AbstractExecutor; |
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import org.apache.commons.jexl.util.GetExecutor; |
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import org.apache.commons.jexl.util.BooleanPropertyExecutor; |
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import org.apache.commons.jexl.util.PropertyExecutor; |
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import org.apache.commons.logging.Log; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.InvocationTargetException; |
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import java.util.Iterator; |
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import java.util.Collection; |
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import java.util.Map; |
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import java.util.Enumeration; |
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import java.util.ArrayList; |
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public class UberspectImpl implements Uberspect, UberspectLoggable |
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{ |
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private Log rlog; |
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private static Introspector introspector; |
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public void init() |
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throws Exception |
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{ |
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} |
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public void setRuntimeLogger(Log runtimeLogger) |
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{ |
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rlog = runtimeLogger; |
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introspector = new Introspector(rlog); |
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} |
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public Iterator getIterator(Object obj, Info i) |
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throws Exception |
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{ |
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if (obj.getClass().isArray()) |
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{ |
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return new ArrayIterator(obj); |
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} |
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else if (obj instanceof Collection) |
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{ |
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return ((Collection) obj).iterator(); |
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} |
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else if (obj instanceof Map) |
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{ |
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return ((Map) obj).values().iterator(); |
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} |
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else if (obj instanceof Iterator) |
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{ |
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rlog.warn ("Warning! The iterative " |
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+ " is an Iterator in the #foreach() loop at [" |
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+ i.getLine() + "," + i.getColumn() + "]" |
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+ " in template " + i.getTemplateName() |
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+ ". Because it's not resetable," |
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+ " if used in more than once, this may lead to" |
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+ " unexpected results."); |
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return ((Iterator) obj); |
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} |
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else if (obj instanceof Enumeration) |
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{ |
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rlog.warn ("Warning! The iterative " |
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+ " is an Enumeration in the #foreach() loop at [" |
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+ i.getLine() + "," + i.getColumn() + "]" |
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+ " in template " + i.getTemplateName() |
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+ ". Because it's not resetable," |
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+ " if used in more than once, this may lead to" |
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+ " unexpected results."); |
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return new EnumerationIterator((Enumeration) obj); |
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} |
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rlog.warn ("Could not determine type of iterator in " |
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+ "#foreach loop " |
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+ " at [" + i.getLine() + "," + i.getColumn() + "]" |
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+ " in template " + i.getTemplateName() ); |
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return null; |
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} |
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public VelMethod getMethod(Object obj, String methodName, Object[] args, Info i) |
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throws Exception |
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{ |
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if (obj == null) |
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return null; |
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Method m = introspector.getMethod(obj.getClass(), methodName, args); |
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return (m != null) ? new VelMethodImpl(m) : class="keyword">null; |
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} |
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public VelPropertyGet getPropertyGet(Object obj, String identifier, Info i) |
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throws Exception |
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{ |
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AbstractExecutor executor; |
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Class claz = obj.getClass(); |
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executor = new PropertyExecutor(rlog,introspector, claz, identifier); |
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if( executor.isAlive() == false) |
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{ |
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executor = new BooleanPropertyExecutor(rlog, introspector, claz, identifier); |
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} |
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if (executor.isAlive() == false) |
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{ |
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executor = new GetExecutor(rlog, introspector, claz, identifier); |
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} |
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return (executor != null) ? new VelGetterImpl(executor) : class="keyword">null; |
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} |
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public VelPropertySet getPropertySet(Object obj, String identifier, Object arg, Info i) |
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throws Exception |
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{ |
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Class claz = obj.getClass(); |
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VelMethod vm = null; |
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try |
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{ |
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Object[] params = {arg}; |
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try |
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{ |
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vm = getMethod(obj, "set" + identifier, params, i); |
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if (vm == null) |
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throw new NoSuchMethodException(); |
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} |
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} |
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catch(NoSuchMethodException nsme2) |
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{ |
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StringBuffer sb = new StringBuffer("set"); |
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sb.append(identifier); |
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if (Character.isLowerCase( sb.charAt(3))) |
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{ |
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sb.setCharAt(3, Character.toUpperCase(sb.charAt(3))); |
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} |
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else |
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{ |
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sb.setCharAt(3, Character.toLowerCase(sb.charAt(3))); |
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} |
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vm = getMethod(obj, sb.toString(), params, i); |
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if (vm == null) |
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{ |
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throw new NoSuchMethodException(); |
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} |
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} |
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} |
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catch (NoSuchMethodException nsme) |
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{ |
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if (Map.class.isAssignableFrom(claz)) |
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{ |
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Object[] params = {new Object(), class="keyword">new Object()}; |
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vm = getMethod(obj, "put", params, i); |
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if (vm!=null) |
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return new VelSetterImpl(vm, identifier); |
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} |
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} |
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return (vm!=null) ? new VelSetterImpl(vm) : class="keyword">null; |
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} |
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public class VelMethodImpl implements VelMethod |
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{ |
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Method method = null; |
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public VelMethodImpl(Method m) |
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{ |
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method = m; |
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} |
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private VelMethodImpl() |
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} |
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public Object invoke(Object o, Object[] params) |
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throws Exception |
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{ |
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try |
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return method.invoke(o, params); |
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} |
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catch( InvocationTargetException e ) |
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{ |
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final Throwable t = e.getTargetException(); |
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if( t instanceof Exception ) |
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throw (Exception)t; |
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} |
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else if (t instanceof Error) |
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{ |
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throw (Error)t; |
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} |
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else |
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{ |
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throw e; |
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} |
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} |
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} |
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public boolean isCacheable() |
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{ |
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return true; |
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} |
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public String getMethodName() |
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{ |
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return method.getName(); |
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} |
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public Class getReturnType() |
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{ |
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return method.getReturnType(); |
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} |
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} |
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public class VelGetterImpl implements VelPropertyGet |
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{ |
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AbstractExecutor ae = null; |
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public VelGetterImpl(AbstractExecutor exec) |
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{ |
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ae = exec; |
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} |
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private VelGetterImpl() |
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{ |
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} |
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public Object invoke(Object o) |
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throws Exception |
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{ |
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return ae.execute(o); |
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} |
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public boolean isCacheable() |
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{ |
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return true; |
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} |
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public String getMethodName() |
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{ |
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return ae.getMethod().getName(); |
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} |
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} |
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public class VelSetterImpl implements VelPropertySet |
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{ |
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VelMethod vm = null; |
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String putKey = null; |
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public VelSetterImpl(VelMethod velmethod) |
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{ |
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this.vm = velmethod; |
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} |
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public VelSetterImpl(VelMethod velmethod, String key) |
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{ |
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this.vm = velmethod; |
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putKey = key; |
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} |
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private VelSetterImpl() |
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{ |
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} |
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public Object invoke(Object o, Object value) |
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throws Exception |
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{ |
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ArrayList al = new ArrayList(); |
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if (putKey != null) |
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{ |
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al.add(putKey); |
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al.add(value); |
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} |
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else |
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{ |
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al.add(value); |
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} |
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return vm.invoke(o,al.toArray()); |
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} |
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public boolean isCacheable() |
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{ |
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return true; |
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} |
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public String getMethodName() |
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{ |
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return vm.getMethodName(); |
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} |
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} |
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} |