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package org.apache.commons.ognl; |
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import org.apache.commons.ognl.enhance.ExpressionCompiler; |
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import org.apache.commons.ognl.enhance.OgnlExpressionCompiler; |
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import org.apache.commons.ognl.enhance.OrderedReturn; |
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import org.apache.commons.ognl.enhance.UnsupportedCompilationException; |
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import java.lang.reflect.Method; |
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public class ASTMethod |
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extends SimpleNode |
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implements OrderedReturn, NodeType |
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{ |
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private String methodName; |
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private String lastExpression; |
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private String coreExpression; |
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private Class getterClass; |
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|
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public ASTMethod( int id ) |
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{ |
50 | 192 | super( id ); |
51 | 192 | } |
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public ASTMethod( OgnlParser p, int id ) |
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{ |
55 | 0 | super( p, id ); |
56 | 0 | } |
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public void setMethodName( String methodName ) |
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{ |
65 | 192 | this.methodName = methodName; |
66 | 192 | } |
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public String getMethodName() |
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{ |
75 | 0 | return methodName; |
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} |
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protected Object getValueBody( OgnlContext context, Object source ) |
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throws OgnlException |
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{ |
81 | 219 | Object[] args = OgnlRuntime.getObjectArrayPool().create( jjtGetNumChildren() ); |
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try |
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{ |
85 | 219 | Object result, root = context.getRoot(); |
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|
87 | 353 | for ( int i = 0; i < args.length; ++i ) |
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{ |
89 | 134 | args[i] = children[i].getValue( context, root ); |
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} |
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|
92 | 219 | result = OgnlRuntime.callMethod( context, source, methodName, args ); |
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|
94 | 211 | if ( result == null ) |
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{ |
96 | 24 | NullHandler nullHandler = OgnlRuntime.getNullHandler( OgnlRuntime.getTargetClass( source ) ); |
97 | 24 | result = nullHandler.nullMethodResult( context, source, methodName, args ); |
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} |
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|
100 | 211 | return result; |
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|
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} |
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finally |
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{ |
105 | 211 | OgnlRuntime.getObjectArrayPool().recycle( args ); |
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} |
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} |
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public String getLastExpression() |
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{ |
111 | 176 | return lastExpression; |
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} |
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public String getCoreExpression() |
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{ |
116 | 1 | return coreExpression; |
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} |
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public Class getGetterClass() |
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{ |
121 | 131 | return getterClass; |
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} |
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public Class getSetterClass() |
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{ |
126 | 46 | return getterClass; |
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} |
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public String toGetSourceString( OgnlContext context, Object target ) |
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{ |
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135 | 109 | if ( target == null ) |
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{ |
137 | 1 | throw new UnsupportedCompilationException( "Target object is null." ); |
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} |
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|
140 | 108 | String post = ""; |
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StringBuilder sourceStringBuilder; |
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Method method; |
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|
144 | 108 | OgnlExpressionCompiler compiler = OgnlRuntime.getCompiler( context ); |
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try |
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{ |
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|
148 | 108 | method = OgnlRuntime.getMethod( context, context.getCurrentType() != null |
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? context.getCurrentType() |
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: target.getClass(), methodName, children, false ); |
151 | 108 | if ( method == null ) |
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{ |
153 | 35 | method = OgnlRuntime.getReadMethod( target.getClass(), methodName, |
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children != null ? children.length : -1 ); |
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} |
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|
157 | 108 | if ( method == null ) |
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{ |
159 | 2 | method = OgnlRuntime.getWriteMethod( target.getClass(), methodName, |
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children != null ? children.length : -1 ); |
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|
162 | 2 | if ( method != null ) |
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{ |
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|
165 | 2 | context.setCurrentType( method.getReturnType() ); |
166 | 2 | context.setCurrentAccessor( |
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compiler.getSuperOrInterfaceClass( method, method.getDeclaringClass() ) ); |
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|
169 | 2 | coreExpression = toSetSourceString( context, target ); |
170 | 0 | if ( coreExpression == null || coreExpression.length() < 1 ) |
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{ |
172 | 0 | throw new UnsupportedCompilationException( "can't find suitable getter method" ); |
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} |
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|
175 | 0 | coreExpression += ";"; |
176 | 0 | lastExpression = "null"; |
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|
178 | 0 | return coreExpression; |
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} |
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|
181 | 0 | return ""; |
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} |
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else |
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{ |
185 | 106 | getterClass = method.getReturnType(); |
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} |
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|
189 | 106 | boolean varArgs = method.isVarArgs(); |
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|
191 | 106 | if ( varArgs ) |
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{ |
193 | 2 | throw new UnsupportedCompilationException( |
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"Javassist does not currently support varargs method calls" ); |
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} |
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|
197 | 104 | sourceStringBuilder = new StringBuilder().append( "." ).append( method.getName() ).append( "(" ); |
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|
199 | 104 | if ( ( children != null ) && ( children.length > 0 ) ) |
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{ |
201 | 53 | Class[] parms = method.getParameterTypes(); |
202 | 53 | String prevCast = (String) context.remove( ExpressionCompiler.PRE_CAST ); |
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209 | 116 | for ( int i = 0; i < children.length; i++ ) |
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{ |
211 | 63 | if ( i > 0 ) |
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{ |
213 | 10 | sourceStringBuilder.append( ", " ); |
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} |
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216 | 63 | Class prevType = context.getCurrentType(); |
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|
218 | 63 | Object root = context.getRoot(); |
219 | 63 | context.setCurrentObject( root ); |
220 | 63 | context.setCurrentType( root != null ? root.getClass() : null ); |
221 | 63 | context.setCurrentAccessor( null ); |
222 | 63 | context.setPreviousType( null ); |
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|
224 | 63 | Node child = children[i]; |
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|
226 | 63 | String parmString = ASTMethodUtil.getParmString( context, root, child, prevType ); |
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228 | 63 | Class valueClass = ASTMethodUtil.getValueClass( context, root, child ); |
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|
230 | 63 | if ( ( !varArgs || varArgs && ( i + 1 ) < parms.length ) && valueClass != parms[i] ) |
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{ |
232 | 24 | parmString = ASTMethodUtil.getParmString( context, parms[i], parmString, child, valueClass, |
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".class, true)" ); |
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} |
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|
236 | 63 | sourceStringBuilder.append( parmString ); |
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} |
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|
239 | 53 | if ( prevCast != null ) |
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{ |
241 | 1 | context.put( ExpressionCompiler.PRE_CAST, prevCast ); |
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} |
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} |
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|
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} |
246 | 4 | catch ( Throwable t ) |
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{ |
248 | 4 | throw OgnlOps.castToRuntime( t ); |
249 | 104 | } |
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|
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try |
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{ |
253 | 104 | Object contextObj = getValueBody( context, target ); |
254 | 103 | context.setCurrentObject( contextObj ); |
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} |
256 | 1 | catch ( Throwable t ) |
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{ |
258 | 1 | throw OgnlOps.castToRuntime( t ); |
259 | 103 | } |
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|
261 | 103 | sourceStringBuilder.append( ")" ).append( post ); |
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|
263 | 103 | if ( method.getReturnType() == void.class ) |
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{ |
265 | 1 | coreExpression = sourceStringBuilder.toString() + ";"; |
266 | 1 | lastExpression = "null"; |
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} |
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|
269 | 103 | context.setCurrentType( method.getReturnType() ); |
270 | 103 | context.setCurrentAccessor( compiler.getSuperOrInterfaceClass( method, method.getDeclaringClass() ) ); |
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|
272 | 103 | return sourceStringBuilder.toString(); |
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} |
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public String toSetSourceString( OgnlContext context, Object target ) |
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{ |
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|
281 | 52 | Method method = |
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OgnlRuntime.getWriteMethod( context.getCurrentType() != null ? context.getCurrentType() : target.getClass(), |
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methodName, children != null ? children.length : -1 ); |
284 | 52 | if ( method == null ) |
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{ |
286 | 31 | throw new UnsupportedCompilationException( |
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"Unable to determine setter method generation for " + methodName ); |
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} |
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|
290 | 21 | String post = ""; |
291 | 21 | String result = "." + method.getName() + "("; |
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|
293 | 21 | if ( method.getReturnType() != void.class && method.getReturnType().isPrimitive() && ( parent == null |
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|| !ASTTest.class.isInstance( parent ) ) ) |
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{ |
296 | 11 | Class wrapper = OgnlRuntime.getPrimitiveWrapperClass( method.getReturnType() ); |
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|
298 | 11 | ExpressionCompiler.addCastString( context, "new " + wrapper.getName() + "(" ); |
299 | 11 | post = ")"; |
300 | 11 | getterClass = wrapper; |
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} |
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|
303 | 21 | boolean varArgs = method.isVarArgs(); |
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|
305 | 21 | if ( varArgs ) |
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{ |
307 | 0 | throw new UnsupportedCompilationException( "Javassist does not currently support varargs method calls" ); |
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} |
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|
310 | 21 | OgnlExpressionCompiler compiler = OgnlRuntime.getCompiler( context ); |
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try |
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{ |
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|
318 | 21 | if ( ( children != null ) && ( children.length > 0 ) ) |
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{ |
320 | 16 | Class[] parms = method.getParameterTypes(); |
321 | 16 | String prevCast = (String) context.remove( ExpressionCompiler.PRE_CAST ); |
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|
323 | 36 | for ( int i = 0; i < children.length; i++ ) |
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{ |
325 | 25 | if ( i > 0 ) |
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{ |
327 | 9 | result += ", "; |
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} |
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|
330 | 25 | Class prevType = context.getCurrentType(); |
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|
332 | 25 | context.setCurrentObject( context.getRoot() ); |
333 | 25 | context.setCurrentType( context.getRoot() != null ? context.getRoot().getClass() : null ); |
334 | 25 | context.setCurrentAccessor( null ); |
335 | 25 | context.setPreviousType( null ); |
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|
337 | 25 | Node child = children[i]; |
338 | 25 | Object value = child.getValue( context, context.getRoot() ); |
339 | 25 | String parmString = child.toSetSourceString( context, context.getRoot() ); |
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|
341 | 20 | if ( context.getCurrentType() == Void.TYPE || context.getCurrentType() == void.class ) |
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{ |
343 | 0 | throw new UnsupportedCompilationException( "Method argument can't be a void type." ); |
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} |
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|
346 | 20 | if ( parmString == null || parmString.trim().length() < 1 ) |
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{ |
348 | 3 | if ( ASTProperty.class.isInstance( child ) || ASTMethod.class.isInstance( child ) |
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|| ASTStaticMethod.class.isInstance( child ) || ASTChain.class.isInstance( child ) ) |
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{ |
351 | 0 | throw new UnsupportedCompilationException( |
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"ASTMethod setter child returned null from a sub property expression." ); |
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} |
354 | 3 | parmString = "null"; |
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} |
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|
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|
358 | 20 | if ( ASTConst.class.isInstance( child ) ) |
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{ |
360 | 13 | context.setCurrentType( prevType ); |
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} |
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|
363 | 20 | parmString = ExpressionCompiler.getRootExpression( child, context.getRoot(), context ) + parmString; |
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|
365 | 20 | String cast = ""; |
366 | 20 | if ( ExpressionCompiler.shouldCast( child ) ) |
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{ |
368 | 7 | cast = (String) context.remove( ExpressionCompiler.PRE_CAST ); |
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} |
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|
371 | 20 | if ( cast == null ) |
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{ |
373 | 7 | cast = ""; |
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} |
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|
376 | 20 | parmString = cast + parmString; |
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|
378 | 20 | Class valueClass = value != null ? value.getClass() : null; |
379 | 20 | if ( NodeType.class.isAssignableFrom( child.getClass() ) ) |
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{ |
381 | 18 | valueClass = ( (NodeType) child ).getGetterClass(); |
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} |
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|
384 | 20 | if ( valueClass != parms[i] ) |
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{ |
386 | 10 | parmString = |
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ASTMethodUtil.getParmString( context, parms[i], parmString, child, valueClass, ".class)" ); |
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} |
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|
390 | 20 | result += parmString; |
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} |
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|
393 | 11 | if ( prevCast != null ) |
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{ |
395 | 4 | context.put( ExpressionCompiler.PRE_CAST, prevCast ); |
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} |
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} |
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|
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} |
400 | 5 | catch ( Throwable t ) |
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{ |
402 | 5 | throw OgnlOps.castToRuntime( t ); |
403 | 16 | } |
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|
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try |
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{ |
407 | 16 | Object contextObj = getValueBody( context, target ); |
408 | 16 | context.setCurrentObject( contextObj ); |
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} |
410 | 0 | catch ( Throwable t ) |
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{ |
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|
413 | 16 | } |
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|
415 | 16 | context.setCurrentType( method.getReturnType() ); |
416 | 16 | context.setCurrentAccessor( compiler.getSuperOrInterfaceClass( method, method.getDeclaringClass() ) ); |
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|
418 | 16 | return result + ")" + post; |
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} |
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public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data ) |
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throws OgnlException |
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{ |
424 | 0 | return visitor.visit( this, data ); |
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} |
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} |