Example usage for org.objectweb.asm Opcodes INVOKESTATIC

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes INVOKESTATIC.

Prototype

int INVOKESTATIC

To view the source code for org.objectweb.asm Opcodes INVOKESTATIC.

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Usage

From source file:com.nginious.http.serialize.JsonSerializerCreator.java

License:Apache License

/**
 * Creates bytecode for serializing a bean property which is in itself a serializable bean as defined in the class description.
 * /*www .ja va 2s  . com*/
 * @param visitor method visitor used for creating bytecode
 * @param returnMethodName binary name of get method in bean that returns serializable bean
 * @param returnType class of serializable bean
 * @param intBeanClazzName binary class name of bean
 */
private void createBeanSerializationCode(MethodVisitor visitor, String returnMethodName, String propertyName,
        Class<?> returnType, String intBeanClazzName) {
    String intReturnClazzName = Serialization.createInternalClassName(returnType);
    visitor.visitVarInsn(Opcodes.ALOAD, 0);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/JsonSerializer",
            "getSerializerFactory", "()Lcom/nginious/http/serialize/SerializerFactoryImpl;");
    visitor.visitLdcInsn(returnType.getName());
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Class", "forName",
            "(Ljava/lang/String;)Ljava/lang/Class;");

    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/SerializerFactoryImpl",
            "createJsonSerializer", "(Ljava/lang/Class;)Lcom/nginious/http/serialize/JsonSerializer;");
    visitor.visitVarInsn(Opcodes.ASTORE, 4);

    visitor.visitVarInsn(Opcodes.ALOAD, 4);
    visitor.visitVarInsn(Opcodes.ALOAD, 3);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, intBeanClazzName, returnMethodName,
            "()L" + intReturnClazzName + ";");
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/JsonSerializer", "serialize",
            "(Ljava/lang/Object;)Lorg/json/JSONObject;");
    visitor.visitVarInsn(Opcodes.ASTORE, 4);

    visitor.visitVarInsn(Opcodes.ALOAD, 1);
    visitor.visitLdcInsn(propertyName);
    visitor.visitVarInsn(Opcodes.ALOAD, 4);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/json/JSONObject", "put",
            "(Ljava/lang/String;Ljava/lang/Object;)Lorg/json/JSONObject;");
}

---

From source file:com.nginious.http.serialize.XmlSerializerCreator.java

License:Apache License

/**
 * Creates bytecode for serializing a bean property which returns a collection of beans that are serializable. Bean serializability
 * is determined as described in the class description.
 * /*from w  w  w.ja  v  a2 s. co  m*/
 * @param visitor method visitor used for creating bytecode
 * @param intBeanClazzName binary class name of bean
 * @param methodName binary name of get method in bean returning collection
 * @param returnType return type of get method in bean
 * @param collectionBeanType class of serializable bean found in collection
 */
private void createBeanCollectionSerializationCode(MethodVisitor visitor, String intBeanClazzName,
        String methodName, String propertyName, Class<?> returnType, Class<?> collectionBeanType) {
    visitor.visitVarInsn(Opcodes.ALOAD, 0);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/XmlSerializer",
            "getSerializerFactory", "()Lcom/nginious/http/serialize/SerializerFactoryImpl;");
    visitor.visitLdcInsn(collectionBeanType.getName());
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Class", "forName",
            "(Ljava/lang/String;)Ljava/lang/Class;");
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/SerializerFactoryImpl",
            "createXmlSerializer", "(Ljava/lang/Class;)Lcom/nginious/http/serialize/XmlSerializer;");
    visitor.visitVarInsn(Opcodes.ASTORE, 4);

    visitor.visitTypeInsn(Opcodes.NEW, "com/nginious/http/serialize/XmlBeanCollectionSerializer");
    visitor.visitInsn(Opcodes.DUP);
    visitor.visitLdcInsn(propertyName);
    visitor.visitVarInsn(Opcodes.ALOAD, 4);
    visitor.visitMethodInsn(Opcodes.INVOKESPECIAL, "com/nginious/http/serialize/XmlBeanCollectionSerializer",
            "<init>", "(Ljava/lang/String;Lcom/nginious/http/serialize/XmlSerializer;)V");
    visitor.visitVarInsn(Opcodes.ASTORE, 5);

    visitor.visitVarInsn(Opcodes.ALOAD, 5);
    visitor.visitVarInsn(Opcodes.ALOAD, 1);

    String intReturnClazzName = returnType.getName().replace('.', '/');
    visitor.visitVarInsn(Opcodes.ALOAD, 3);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, intBeanClazzName, methodName,
            "()L" + intReturnClazzName + ";");

    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/XmlBeanCollectionSerializer",
            "serialize", "(Ljavax/xml/transform/sax/TransformerHandler;Ljava/util/Collection;)V");
}

---

From source file:com.nginious.http.serialize.XmlSerializerCreator.java

License:Apache License

/**
 * Creates bytecode for serializing a bean property which is in itself a serializable bean as defined in the class description.
 * //w ww.  j a v  a  2  s .  c o m
 * @param visitor method visitor used for creating bytecode
 * @param returnMethodName binary name of get method in bean that returns serializable bean
 * @param returnType class of serializable bean
 * @param intBeanClazzName binary class name of bean
 */
private void createBeanSerializationCode(MethodVisitor visitor, String returnMethodName, String propertyName,
        Class<?> returnType, String intBeanClazzName) {
    String intReturnClazzName = Serialization.createInternalClassName(returnType);
    visitor.visitVarInsn(Opcodes.ALOAD, 0);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/XmlSerializer",
            "getSerializerFactory", "()Lcom/nginious/http/serialize/SerializerFactoryImpl;");
    visitor.visitLdcInsn(returnType.getName());
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Class", "forName",
            "(Ljava/lang/String;)Ljava/lang/Class;");

    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/SerializerFactoryImpl",
            "createXmlSerializer", "(Ljava/lang/Class;)Lcom/nginious/http/serialize/XmlSerializer;");
    visitor.visitVarInsn(Opcodes.ASTORE, 4);

    visitor.visitVarInsn(Opcodes.ALOAD, 4);
    visitor.visitVarInsn(Opcodes.ALOAD, 1);
    visitor.visitLdcInsn(convertToXmlName(propertyName));
    visitor.visitVarInsn(Opcodes.ALOAD, 3);
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, intBeanClazzName, returnMethodName,
            "()L" + intReturnClazzName + ";");
    visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "com/nginious/http/serialize/XmlSerializer", "serialize",
            "(Ljavax/xml/transform/sax/TransformerHandler;Ljava/lang/String;Ljava/lang/Object;)V");
    visitor.visitVarInsn(Opcodes.ASTORE, 4);
}

---

From source file:com.nginious.http.xsp.expr.AbsFunction.java

License:Apache License

/**
 * Creates bytecode for evaluating this function. Bytecode is generated using
 * the specified method visitor which evaluates this value with the
 * specified type as result./*from  www . ja v  a 2  s. c  o  m*/
 * 
 * @param visitor the method visitor
 * @param type the type
 */
void compile(MethodVisitor visitor, Type type) {
    if (value.getType() == Type.DOUBLE || value.getType() == Type.ANY) {
        value.compile(visitor, Type.DOUBLE);
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Math", "abs", "(D)D");
    } else {
        value.compile(visitor, Type.INT);
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Math", "abs", "(I)I");
    }
}

---

From source file:com.nginious.http.xsp.expr.AttributeValue.java

License:Apache License

/**
 * Creates bytecode for evaluating this attribute value. The bytecode is created using the
 * specified method visitor and creates a result of specified type.
 * //ww  w.j av a2s.  c o m
 * @param visitor the method visitor
 * @param type the type
 */
void compile(MethodVisitor visitor, Type type) {
    visitor.visitLdcInsn(this.name);
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/nginious/http/xsp/expr/Expression", "getVariable",
            "(Ljava/lang/String;)Ljava/lang/Object;");

    if (type != Type.ANY) {
        visitor.visitInsn(Opcodes.DUP);
    }

    if (type == Type.STRING) {
        Label nullLabel = new Label();
        Label notNullLabel = new Label();

        visitor.visitJumpInsn(Opcodes.IFNULL, nullLabel);

        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        visitor.visitJumpInsn(Opcodes.GOTO, notNullLabel);

        visitor.visitLabel(nullLabel);
        visitor.visitInsn(Opcodes.POP);
        visitor.visitInsn(Opcodes.ACONST_NULL);

        visitor.visitLabel(notNullLabel);
    } else if (type == Type.INT) {
        Label nullLabel = new Label();
        Label notNullLabel = new Label();

        visitor.visitJumpInsn(Opcodes.IFNULL, nullLabel);

        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Integer", "parseInt", "(Ljava/lang/String;)I");
        visitor.visitJumpInsn(Opcodes.GOTO, notNullLabel);

        visitor.visitLabel(nullLabel);
        visitor.visitInsn(Opcodes.POP);
        visitor.visitLdcInsn(0);

        visitor.visitLabel(notNullLabel);
    } else if (type == Type.DOUBLE) {
        Label nullLabel = new Label();
        Label notNullLabel = new Label();

        visitor.visitJumpInsn(Opcodes.IFNULL, nullLabel);

        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Double", "parseDouble",
                "(Ljava/lang/String;)D");
        visitor.visitJumpInsn(Opcodes.GOTO, notNullLabel);

        visitor.visitLabel(nullLabel);
        visitor.visitInsn(Opcodes.POP);
        visitor.visitLdcInsn(0.0d);

        visitor.visitLabel(notNullLabel);
    }
}

---

From source file:com.nginious.http.xsp.expr.BeanValue.java

License:Apache License

/**
 * Creates bytecode for evaluating this bean value. The bytecode is generated using the
 * specified method visitor and produces a value of the specified type.
 * //from   www . j  ava  2  s  . co  m
 * @param visitor the method visitor
 * @param type the type
 */
void compile(MethodVisitor visitor, Type type) {
    visitor.visitLdcInsn(this.beanName);
    visitor.visitLdcInsn(this.propertyName);
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "com/nginious/http/xsp/expr/BeanValue", "getValue",
            "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;");

    if (type != Type.ANY) {
        visitor.visitInsn(Opcodes.DUP);
    }

    // visitor.visitJumpInsn(Opcodes.IFNONNULL, null);

    if (type == Type.DOUBLE) {
        Label nullLabel = new Label();
        Label notNullLabel = new Label();

        visitor.visitJumpInsn(Opcodes.IFNULL, nullLabel);

        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Double", "parseDouble",
                "(Ljava/lang/String;)D");
        visitor.visitJumpInsn(Opcodes.GOTO, notNullLabel);

        visitor.visitLabel(nullLabel);
        visitor.visitInsn(Opcodes.POP);
        visitor.visitLdcInsn(0.0d);

        visitor.visitLabel(notNullLabel);
    } else if (type == Type.INT) {
        Label nullLabel = new Label();
        Label notNullLabel = new Label();

        visitor.visitJumpInsn(Opcodes.IFNULL, nullLabel);

        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Integer", "parseInt", "(Ljava/lang/String;)I");
        visitor.visitJumpInsn(Opcodes.GOTO, notNullLabel);

        visitor.visitLabel(nullLabel);
        visitor.visitInsn(Opcodes.POP);
        visitor.visitLdcInsn(0);

        visitor.visitLabel(notNullLabel);
    } else if (type == Type.STRING) {
        Label nullLabel = new Label();
        Label notNullLabel = new Label();

        visitor.visitJumpInsn(Opcodes.IFNULL, nullLabel);

        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        visitor.visitJumpInsn(Opcodes.GOTO, notNullLabel);

        visitor.visitLabel(nullLabel);
        visitor.visitInsn(Opcodes.POP);
        visitor.visitInsn(Opcodes.ACONST_NULL);

        visitor.visitLabel(notNullLabel);
    }
}

---

From source file:com.nginious.http.xsp.expr.ExpressionCompiler.java

License:Apache License

/**
 * Creates a compiled expression from the specified tree value node expression. The class bytecode for the 
 * compiled expression is generated at runtime.
 * /*from   ww  w. ja  v a2s  .c  o m*/
 * @param uncompiled the uncompiled tree value node expression
 * @return the compiled expression
 * @throws ExpressionException if unable to compile expression
 */
public Expression compile(TreeExpression uncompiled) throws ExpressionException {
    ClassWriter writer = new ClassWriter(0);

    // Create class
    String className = classBaseName + classNameCounter.getAndIncrement();
    String classIdentifier = className.replace('.', '/');
    writer.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC, classIdentifier, "L" + classIdentifier + ";",
            "com/nginious/http/xsp/expr/Expression", null);

    // Create constructor
    MethodVisitor visitor = writer.visitMethod(Opcodes.ACC_PROTECTED, "<init>", "()V", null, null);
    visitor.visitCode();
    visitor.visitVarInsn(Opcodes.ALOAD, 0);
    visitor.visitMethodInsn(Opcodes.INVOKESPECIAL, "com/nginious/http/xsp/expr/Expression", "<init>", "()V");
    visitor.visitInsn(Opcodes.RETURN);
    visitor.visitMaxs(1, 1);
    visitor.visitEnd();

    // protected abstract boolean evaluateBoolean();
    visitor = writer.visitMethod(Opcodes.ACC_PROTECTED, "evaluateBoolean", "()Z", null, null);

    if (uncompiled.getType() == Type.BOOLEAN) {
        uncompiled.compile(visitor);
    } else if (uncompiled.getType() == Type.DOUBLE) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateDouble", "()D");

        Label endLabel = new Label();
        Label falseLabel = new Label();
        visitor.visitLdcInsn(0.0d);
        visitor.visitInsn(Opcodes.DCMPL);
        visitor.visitJumpInsn(Opcodes.IFEQ, falseLabel);
        visitor.visitLdcInsn(true);
        visitor.visitJumpInsn(Opcodes.GOTO, endLabel);
        visitor.visitLabel(falseLabel);
        visitor.visitLdcInsn(false);
        visitor.visitLabel(endLabel);
    } else if (uncompiled.getType() == Type.INT) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateInt", "()I");

        Label endLabel = new Label();
        Label falseLabel = new Label();
        visitor.visitLdcInsn(0);
        visitor.visitJumpInsn(Opcodes.IFNE, falseLabel);
        visitor.visitLdcInsn(true);
        visitor.visitJumpInsn(Opcodes.GOTO, endLabel);
        visitor.visitLabel(falseLabel);
        visitor.visitLdcInsn(false);
        visitor.visitLabel(endLabel);
    } else if (uncompiled.getType() == Type.STRING) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateString",
                "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Boolean", "parseBoolean",
                "(Ljava/lang/String;)Z");
    }

    visitor.visitInsn(Opcodes.IRETURN);
    visitor.visitMaxs(5, 5);
    visitor.visitEnd();

    // protected abstract int evaluateInt();
    visitor = writer.visitMethod(Opcodes.ACC_PROTECTED, "evaluateInt", "()I", null, null);

    if (uncompiled.getType() == Type.BOOLEAN) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateBoolean", "()Z");

        Label endLabel = new Label();
        Label falseLabel = new Label();
        visitor.visitJumpInsn(Opcodes.IFEQ, falseLabel);
        visitor.visitLdcInsn(1);
        visitor.visitJumpInsn(Opcodes.GOTO, endLabel);
        visitor.visitLabel(falseLabel);
        visitor.visitLdcInsn(0);
        visitor.visitLabel(endLabel);
    } else if (uncompiled.getType() == Type.DOUBLE) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateDouble", "()D");
        visitor.visitInsn(Opcodes.D2I);
    } else if (uncompiled.getType() == Type.INT) {
        uncompiled.compile(visitor);
    } else if (uncompiled.getType() == Type.STRING) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateString",
                "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Integer", "parseInt", "(Ljava/lang/String;)I");
    }

    visitor.visitInsn(Opcodes.IRETURN);
    visitor.visitMaxs(5, 5);
    visitor.visitEnd();

    // protected abstract double evaluateDouble();
    visitor = writer.visitMethod(Opcodes.ACC_PROTECTED, "evaluateDouble", "()D", null, null);

    if (uncompiled.getType() == Type.BOOLEAN) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateBoolean", "()Z");

        Label endLabel = new Label();
        Label falseLabel = new Label();
        visitor.visitJumpInsn(Opcodes.IFEQ, falseLabel);
        visitor.visitLdcInsn(1.0d);
        visitor.visitJumpInsn(Opcodes.GOTO, endLabel);
        visitor.visitLabel(falseLabel);
        visitor.visitLdcInsn(0.0d);
        visitor.visitLabel(endLabel);
    } else if (uncompiled.getType() == Type.DOUBLE) {
        uncompiled.compile(visitor);
    } else if (uncompiled.getType() == Type.INT) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateInt", "()I");
        visitor.visitInsn(Opcodes.I2D);
    } else if (uncompiled.getType() == Type.STRING) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateString",
                "()Ljava/lang/String;");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Double", "parseDouble",
                "(Ljava/lang/String;)D");
    }

    visitor.visitInsn(Opcodes.DRETURN);
    visitor.visitMaxs(5, 5);
    visitor.visitEnd();

    // protected abstract String evaluateString();
    visitor = writer.visitMethod(Opcodes.ACC_PROTECTED, "evaluateString", "()Ljava/lang/String;", null, null);

    if (uncompiled.getType() == Type.BOOLEAN) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateBoolean", "()Z");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Boolean", "toString", "(Z)Ljava/lang/String;");
    } else if (uncompiled.getType() == Type.DOUBLE) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateDouble", "()D");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Double", "toString", "(D)Ljava/lang/String;");
    } else if (uncompiled.getType() == Type.INT) {
        visitor.visitVarInsn(Opcodes.ALOAD, 0); // this
        visitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classIdentifier, "evaluateInt", "()I");
        visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Integer", "toString", "(I)Ljava/lang/String;");
    } else if (uncompiled.getType() == Type.STRING) {
        uncompiled.compile(visitor);
    }

    visitor.visitInsn(Opcodes.ARETURN);
    visitor.visitMaxs(6, 6);
    visitor.visitEnd();

    // public abstract Type getType();        
    visitor = writer.visitMethod(Opcodes.ACC_PUBLIC, "getType", "()Lcom/nginious/http/xsp/expr/Type;", null,
            null);

    if (uncompiled.getType() == Type.BOOLEAN) {
        visitor.visitFieldInsn(Opcodes.GETSTATIC, "com/nginious/http/xsp/expr/Type", "BOOLEAN",
                "Lcom/nginious/http/xsp/expr/Type;");
        visitor.visitInsn(Opcodes.ARETURN);
    } else if (uncompiled.getType() == Type.DOUBLE) {
        visitor.visitFieldInsn(Opcodes.GETSTATIC, "com/nginious/http/xsp/expr/Type", "DOUBLE",
                "Lcom/nginious/http/xsp/expr/Type;");
        visitor.visitInsn(Opcodes.ARETURN);
    } else if (uncompiled.getType() == Type.INT) {
        visitor.visitFieldInsn(Opcodes.GETSTATIC, "com/nginious/http/xsp/expr/Type", "INT",
                "Lcom/nginious/http/xsp/expr/Type;");
        visitor.visitInsn(Opcodes.ARETURN);
    } else if (uncompiled.getType() == Type.STRING) {
        visitor.visitFieldInsn(Opcodes.GETSTATIC, "com/nginious/http/xsp/expr/Type", "STRING",
                "Lcom/nginious/http/xsp/expr/Type;");
        visitor.visitInsn(Opcodes.ARETURN);
    }

    visitor.visitMaxs(1, 1);
    visitor.visitEnd();

    try {
        writer.visitEnd();
        byte[] clazzBytes = writer.toByteArray();
        Class<?> clazz = loadClass(className, clazzBytes);
        return (Expression) clazz.newInstance();
    } catch (Exception e) {
        throw new ExpressionException("Can't instantiate compiled expression", e);
    }
}

---

From source file:com.nginious.http.xsp.expr.MathFunction.java

License:Apache License

/**
 * Creates bytecode for evaluating this function. The specified method visitor is used
 * for generating bytecode.//w ww .j  av  a  2s .  c  om
 * 
 * @param visitor the method visitor
 * @param type the type
 */
void compile(MethodVisitor visitor, Type type) {
    value.compile(visitor, Type.DOUBLE);
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Math", getName(), "(D)D");
}

---

From source file:com.nginious.http.xsp.expr.MaxFunction.java

License:Apache License

/**
 * Creates bytecode for evaluating this function. The bytecode is generated using the
 * specified method visitor. The generated bytecode produces a result of the specified
 * type.//from w  w  w .j  a v a  2s.com
 * 
 * @param visitor the method visitor
 * @param type the type
 */
void compile(MethodVisitor visitor, Type type) {
    type = resolveType(this.value1, this.value2);
    value1.compile(visitor, type);
    value2.compile(visitor, type);
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Math", "max",
            type == Type.DOUBLE ? "(DD)D" : "(II)I");
}

---

From source file:com.nginious.http.xsp.expr.MinFunction.java

License:Apache License

/**
 * Creates bytecode for evaluating this function. The bytecode is generated using the
 * specified method visitor. The generated bytecode produces a result of the specified
 * type./*  w w  w.  ja v  a 2 s. c om*/
 * 
 * @param visitor the method visitor
 * @param type the type
 */
void compile(MethodVisitor visitor, Type type) {
    type = resolveType(this.value1, this.value2);
    value1.compile(visitor, type);
    value2.compile(visitor, type);
    visitor.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Math", "min",
            type == Type.DOUBLE ? "(DD)D" : "(II)I");
}

---

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