001/*
002 * Copyright (c) 2024 QOS.ch Sarl (Switzerland)
003 * All rights reserved.
004 *
005 * Permission is hereby granted, free  of charge, to any person obtaining
006 * a  copy  of this  software  and  associated  documentation files  (the
007 * "Software"), to  deal in  the Software without  restriction, including
008 * without limitation  the rights to  use, copy, modify,  merge, publish,
009 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
010 * permit persons to whom the Software  is furnished to do so, subject to
011 * the following conditions:
012 *
013 * The  above  copyright  notice  and  this permission  notice  shall  be
014 * included in all copies or substantial portions of the Software.
015 *
016 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
017 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
018 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
019 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
020 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
021 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
022 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
023 *
024 *
025 *
026 */
027
028package ch.qos.logback.tyler.base.handler;
029
030import ch.qos.logback.core.Context;
031import ch.qos.logback.core.model.ComponentModel;
032import ch.qos.logback.core.model.Model;
033import ch.qos.logback.core.model.processor.ModelHandlerBase;
034import ch.qos.logback.core.model.processor.ModelHandlerException;
035import ch.qos.logback.core.model.processor.ModelInterpretationContext;
036import ch.qos.logback.core.spi.LifeCycle;
037import ch.qos.logback.core.util.OptionHelper;
038import ch.qos.logback.tyler.base.TylerModelInterpretationContext;
039import ch.qos.logback.tyler.base.util.ClassUtil;
040import ch.qos.logback.tyler.base.util.VariableNameUtil;
041import com.squareup.javapoet.ClassName;
042import com.squareup.javapoet.MethodSpec;
043
044import static ch.qos.logback.tyler.base.TylerConstants.SETUP;
045
046public abstract class ComponentModelHandler extends ModelHandlerBase {
047
048    private boolean inError;
049    ImplicitModelHandlerData implicitModelHandlerData;
050
051    public ComponentModelHandler(Context context) {
052        super(context);
053    }
054
055    abstract String getTargetType();
056
057    @Override
058    public void handle(ModelInterpretationContext mic, Model model) throws ModelHandlerException {
059
060        ComponentModel componentModel = (ComponentModel) model;
061        TylerModelInterpretationContext tmic = (TylerModelInterpretationContext) mic;
062
063        String componentClassName = componentModel.getClassName();
064        if (OptionHelper.isNullOrEmptyOrAllSpaces(componentClassName)) {
065            addWarn("Missing className. This should have been caught earlier.");
066            inError = true;
067            return;
068        } else {
069            componentClassName = mic.getImport(componentClassName);
070        }
071
072        addInfo("About to configure " + getTargetType() + " of type [" + componentClassName + "]");
073        MethodSpec.Builder methodSpec = addJavaStatement(tmic, componentClassName);
074        addAdditionalJavaStatement(methodSpec, componentModel);
075        this.implicitModelHandlerData = ImplicitModelHandlerData.makeInstance(this, methodSpec, componentClassName);
076        if(implicitModelHandlerData != null) {
077            mic.pushObject(implicitModelHandlerData);
078        } else {
079            addError("Could not make implicitModelHandlerData for ["+componentClassName+"]");
080            model.markAsSkipped();
081            inError = true;
082        }
083    }
084
085    protected void addAdditionalJavaStatement(MethodSpec.Builder methodSpec, ComponentModel componentModel) {
086
087    }
088
089    MethodSpec.Builder addJavaStatement(TylerModelInterpretationContext tmic,
090            String componentClassName) {
091
092
093        String simpleName = ClassUtil.extractSimpleClassName(componentClassName);
094
095        ClassName desiredComponentCN = ClassName.get(ClassUtil.extractPackageName(componentClassName),
096                simpleName);
097
098        String variableName = VariableNameUtil.fullyQualifiedClassNameToVariableName(componentClassName);
099
100        MethodSpec.Builder methodSpecBuilder = MethodSpec.methodBuilder(
101                        SETUP + simpleName).returns(void.class)
102                .addStatement("$1T $2N = new $1T()", desiredComponentCN, variableName)
103                .addStatement("$N.setContext($N)", variableName, tmic.getContextFieldSpec());
104
105        return methodSpecBuilder;
106    }
107
108    @Override
109    public void postHandle(ModelInterpretationContext mic, Model model) {
110        if (inError) {
111            return;
112        }
113
114        Object o = mic.peekObject();
115        if (o != implicitModelHandlerData) {
116            addWarn("The object at the of the stack is not the implicitModelHandlerData pushed earlier.");
117        } else {
118            TylerModelInterpretationContext tmic = (TylerModelInterpretationContext) mic;
119            tmic.popObject();
120
121            MethodSpec.Builder componentMethodBuilder = implicitModelHandlerData.methodSpecBuilder;
122
123            String variableName = implicitModelHandlerData.getVariableName();
124
125            componentMethodBuilder.addCode("\n");
126            componentMethodBuilder.beginControlFlow("if($N instanceof $T)", variableName, LifeCycle.class);
127            componentMethodBuilder.addStatement("(($T)$N).start()", LifeCycle.class, variableName);
128            componentMethodBuilder.endControlFlow();
129            MethodSpec statusListenerMethodSpec = componentMethodBuilder.build();
130
131            tmic.tylerConfiguratorTSB.addMethod(statusListenerMethodSpec);
132
133            tmic.configureMethodSpecBuilder.addStatement("$N()", statusListenerMethodSpec);
134        }
135
136    }
137}