Classworking工具箱: 注释（Annotation）与ASM - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-16
| bjectweb.asm.commons.EmptyVisitor; /** * Visitor implementation to collect field annotation information from class. */ public class FieldCollector extends EmptyVisitor { private boolean m_isIncluded; private int m_fieldAccess; private String m_fieldName; private Type m_fieldType; private int m_fieldOrder; private String m_fieldText; private ArrayList m_fields = new ArrayList(); // finish field handling, once we''re past it private void finishField() { if (m_isIncluded) { m_fields.add(new FieldInfo(m_fieldName, m_fieldType, m_fieldOrder, m_fieldText)); } m_isIncluded = false; } // return array of included field information public FieldInfo[] getFields() { finishField(); FieldInfo[] infos = (FieldInfo[])m_fields.toArray(new FieldInfo[m_fields.size()]); Arrays.sort(infos); return infos; } // process field found in class public FieldVisitor visitField(int access, String name, String desc, String sig, Object init) { // finish processing of last field finishField(); // save information for this field m_fieldAccess = access; m_fieldName = name; m_fieldType = Type.getReturnType(desc); m_fieldOrder = Integer.MAX_VALUE; // default text is empty if non-String object, otherwise from field name if (m_fieldType.getSort() == Type.OBJECT && !m_fieldType.getClassName().equals("java.lang.String")) { m_fieldText = ""; } else { String text = name; if (text.startsWith("m_") && text.length() > 2) { text = Character.toLowerCase(text.charAt(2)) + text.substring(3); } m_fieldText = text; } return super.visitField(access, name, desc, sig, init); } // process annotation found in class public AnnotationVisitor visitAnnotation(String sig, boolean visible) { // flag field to be included in representation if (sig.equals("Lcom/sosnoski/asm/ToString;")) { if ((m_fieldAccess & Opcodes.ACC_STATIC) == 0) { m_isIncluded = true; } else { throw new IllegalStateException("ToString " + "annotation is not supported for static field +" + " m_fieldName"); } } return super.visitAnnotation(sig, visible); } // process annotation name-value pair found in class public void visit(String name, Object value) { |
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